从零搭建SSM框架（三）SSM框架整合

整合思路

1.Dao层：

Mybatis的配置文件：SqlMapConfig.xml

不需要配置任何内容，需要有文件头。文件必须存在。

applicationContext-dao.xml：

mybatis整合spring，通过由spring创建数据库连接池，spring管理SqlSessionFactory、mapper代理对象。需要mybatis和spring的整合包。

2.Service层：

applicationContext-service.xml：

所有的service实现类都放到spring容器中管理。并由spring管理事务。

3.表现层：

Springmvc框架，由springmvc管理controller。

Springmvc的三大组件。

整合步骤

 db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/e3mall?characterEncoding=utf-8
jdbc.username=root
jdbc.password=root

SqlMapConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

</configuration>

applicationContext-dao.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd">

    <!-- 数据库连接池 -->
    <!-- 加载配置文件 -->
    <context:property-placeholder location="classpath:conf/db.properties" />
    <!-- 数据库连接池 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
        destroy-method="close">
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />
        <property name="driverClassName" value="${jdbc.driver}" />
        <property name="maxActive" value="10" />
        <property name="minIdle" value="5" />
    </bean>
    <!-- 让spring管理sqlsessionfactory 使用mybatis和spring整合包中的 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 数据库连接池 -->
        <property name="dataSource" ref="dataSource" />
        <!-- 加载mybatis的全局配置文件 -->
        <property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml" />
    </bean>
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="cn.cnki.mapper" />
    </bean>
</beans>

applicationContext-service.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
    http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd">

    <!-- 配置包扫描器 -->
    <context:component-scan base-package="cn.cnki.service"/>
</beans>

applicationContext-trans.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd">
    <!-- 事务管理器 -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 数据源 -->
        <property name="dataSource" ref="dataSource" />
    </bean>
    <!-- 通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <!-- 传播行为 -->
            <tx:method name="save*" propagation="REQUIRED" />
            <tx:method name="insert*" propagation="REQUIRED" />
            <tx:method name="add*" propagation="REQUIRED" />
            <tx:method name="create*" propagation="REQUIRED" />
            <tx:method name="delete*" propagation="REQUIRED" />
            <tx:method name="update*" propagation="REQUIRED" />
            <tx:method name="find*" propagation="SUPPORTS" read-only="true" />
            <tx:method name="select*" propagation="SUPPORTS" read-only="true" />
            <tx:method name="get*" propagation="SUPPORTS" read-only="true" />
        </tx:attributes>
    </tx:advice>
    <!-- 切面 -->
    <aop:config>
        <aop:advisor advice-ref="txAdvice"
            pointcut="execution(* cn.cnki.service..*.*(..))" />
    </aop:config>
</beans>

springmvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd">

    <context:component-scan base-package="cn.cnki.controller" />
    <mvc:annotation-driven />
    <bean  class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>
    <!-- 配置资源映射 -->
    <mvc:resources location="/css/" mapping="/css/**"/>
    <mvc:resources location="/js/" mapping="/js/**"/>
</beans>

 web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
  <display-name>cnki-manager-web</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <!-- 加载spring容器 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/applicationContext-*.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
  <!-- 解决post乱码 -->
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- springmvc的前端控制器 -->
    <servlet>
        <servlet-name>cnki-manager</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- contextConfigLocation不是必须的， 如果不配置contextConfigLocation， springmvc的配置文件默认在：WEB-INF/servlet的name+"-servlet.xml" -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>cnki-manager</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

测试框架

1.数据库新建表

2.cnki-manager-pojo

TbItem

package cn.cnki.pojo;

import java.io.Serializable;
import java.util.Date;

public class TbItem implements Serializable{
    private Long id;

    private String title;

    private String sellPoint;

    private Long price;

    private Integer num;

    private String barcode;

    private String image;

    private Long cid;

    private Byte status;

    private Date created;

    private Date updated;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title == null ? null : title.trim();
    }

    public String getSellPoint() {
        return sellPoint;
    }

    public void setSellPoint(String sellPoint) {
        this.sellPoint = sellPoint == null ? null : sellPoint.trim();
    }

    public Long getPrice() {
        return price;
    }

    public void setPrice(Long price) {
        this.price = price;
    }

    public Integer getNum() {
        return num;
    }

    public void setNum(Integer num) {
        this.num = num;
    }

    public String getBarcode() {
        return barcode;
    }

    public void setBarcode(String barcode) {
        this.barcode = barcode == null ? null : barcode.trim();
    }

    public String getImage() {
        return image;
    }

    public void setImage(String image) {
        this.image = image == null ? null : image.trim();
    }

    public Long getCid() {
        return cid;
    }

    public void setCid(Long cid) {
        this.cid = cid;
    }

    public Byte getStatus() {
        return status;
    }

    public void setStatus(Byte status) {
        this.status = status;
    }

    public Date getCreated() {
        return created;
    }

    public void setCreated(Date created) {
        this.created = created;
    }

    public Date getUpdated() {
        return updated;
    }

    public void setUpdated(Date updated) {
        this.updated = updated;
    }
}

TbItemExample

package cn.cnki.pojo;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class TbItemExample {
    protected String orderByClause;

    protected boolean distinct;

    protected List<Criteria> oredCriteria;

    public TbItemExample() {
        oredCriteria = new ArrayList<Criteria>();
    }

    public void setOrderByClause(String orderByClause) {
        this.orderByClause = orderByClause;
    }

    public String getOrderByClause() {
        return orderByClause;
    }

    public void setDistinct(boolean distinct) {
        this.distinct = distinct;
    }

    public boolean isDistinct() {
        return distinct;
    }

    public List<Criteria> getOredCriteria() {
        return oredCriteria;
    }

    public void or(Criteria criteria) {
        oredCriteria.add(criteria);
    }

    public Criteria or() {
        Criteria criteria = createCriteriaInternal();
        oredCriteria.add(criteria);
        return criteria;
    }

    public Criteria createCriteria() {
        Criteria criteria = createCriteriaInternal();
        if (oredCriteria.size() == 0) {
            oredCriteria.add(criteria);
        }
        return criteria;
    }

    protected Criteria createCriteriaInternal() {
        Criteria criteria = new Criteria();
        return criteria;
    }

    public void clear() {
        oredCriteria.clear();
        orderByClause = null;
        distinct = false;
    }

    protected abstract static class GeneratedCriteria {
        protected List<Criterion> criteria;

        protected GeneratedCriteria() {
            super();
            criteria = new ArrayList<Criterion>();
        }

        public boolean isValid() {
            return criteria.size() > 0;
        }

        public List<Criterion> getAllCriteria() {
            return criteria;
        }

        public List<Criterion> getCriteria() {
            return criteria;
        }

        protected void addCriterion(String condition) {
            if (condition == null) {
                throw new RuntimeException("Value for condition cannot be null");
            }
            criteria.add(new Criterion(condition));
        }

        protected void addCriterion(String condition, Object value, String property) {
            if (value == null) {
                throw new RuntimeException("Value for " + property + " cannot be null");
            }
            criteria.add(new Criterion(condition, value));
        }

        protected void addCriterion(String condition, Object value1, Object value2, String property) {
            if (value1 == null || value2 == null) {
                throw new RuntimeException("Between values for " + property + " cannot be null");
            }
            criteria.add(new Criterion(condition, value1, value2));
        }

        public Criteria andIdIsNull() {
            addCriterion("id is null");
            return (Criteria) this;
        }

        public Criteria andIdIsNotNull() {
            addCriterion("id is not null");
            return (Criteria) this;
        }

        public Criteria andIdEqualTo(Long value) {
            addCriterion("id =", value, "id");
            return (Criteria) this;
        }

        public Criteria andIdNotEqualTo(Long value) {
            addCriterion("id <>", value, "id");
            return (Criteria) this;
        }

        public Criteria andIdGreaterThan(Long value) {
            addCriterion("id >", value, "id");
            return (Criteria) this;
        }

        public Criteria andIdGreaterThanOrEqualTo(Long value) {
            addCriterion("id >=", value, "id");
            return (Criteria) this;
        }

        public Criteria andIdLessThan(Long value) {
            addCriterion("id <", value, "id");
            return (Criteria) this;
        }

        public Criteria andIdLessThanOrEqualTo(Long value) {
            addCriterion("id <=", value, "id");
            return (Criteria) this;
        }

        public Criteria andIdIn(List<Long> values) {
            addCriterion("id in", values, "id");
            return (Criteria) this;
        }

        public Criteria andIdNotIn(List<Long> values) {
            addCriterion("id not in", values, "id");
            return (Criteria) this;
        }

        public Criteria andIdBetween(Long value1, Long value2) {
            addCriterion("id between", value1, value2, "id");
            return (Criteria) this;
        }

        public Criteria andIdNotBetween(Long value1, Long value2) {
            addCriterion("id not between", value1, value2, "id");
            return (Criteria) this;
        }

        public Criteria andTitleIsNull() {
            addCriterion("title is null");
            return (Criteria) this;
        }

        public Criteria andTitleIsNotNull() {
            addCriterion("title is not null");
            return (Criteria) this;
        }

        public Criteria andTitleEqualTo(String value) {
            addCriterion("title =", value, "title");
            return (Criteria) this;
        }

        public Criteria andTitleNotEqualTo(String value) {
            addCriterion("title <>", value, "title");
            return (Criteria) this;
        }

        public Criteria andTitleGreaterThan(String value) {
            addCriterion("title >", value, "title");
            return (Criteria) this;
        }

        public Criteria andTitleGreaterThanOrEqualTo(String value) {
            addCriterion("title >=", value, "title");
            return (Criteria) this;
        }

        public Criteria andTitleLessThan(String value) {
            addCriterion("title <", value, "title");
            return (Criteria) this;
        }

        public Criteria andTitleLessThanOrEqualTo(String value) {
            addCriterion("title <=", value, "title");
            return (Criteria) this;
        }

        public Criteria andTitleLike(String value) {
            addCriterion("title like", value, "title");
            return (Criteria) this;
        }

        public Criteria andTitleNotLike(String value) {
            addCriterion("title not like", value, "title");
            return (Criteria) this;
        }

        public Criteria andTitleIn(List<String> values) {
            addCriterion("title in", values, "title");
            return (Criteria) this;
        }

        public Criteria andTitleNotIn(List<String> values) {
            addCriterion("title not in", values, "title");
            return (Criteria) this;
        }

        public Criteria andTitleBetween(String value1, String value2) {
            addCriterion("title between", value1, value2, "title");
            return (Criteria) this;
        }

        public Criteria andTitleNotBetween(String value1, String value2) {
            addCriterion("title not between", value1, value2, "title");
            return (Criteria) this;
        }

        public Criteria andSellPointIsNull() {
            addCriterion("sell_point is null");
            return (Criteria) this;
        }

        public Criteria andSellPointIsNotNull() {
            addCriterion("sell_point is not null");
            return (Criteria) this;
        }

        public Criteria andSellPointEqualTo(String value) {
            addCriterion("sell_point =", value, "sellPoint");
            return (Criteria) this;
        }

        public Criteria andSellPointNotEqualTo(String value) {
            addCriterion("sell_point <>", value, "sellPoint");
            return (Criteria) this;
        }

        public Criteria andSellPointGreaterThan(String value) {
            addCriterion("sell_point >", value, "sellPoint");
            return (Criteria) this;
        }

        public Criteria andSellPointGreaterThanOrEqualTo(String value) {
            addCriterion("sell_point >=", value, "sellPoint");
            return (Criteria) this;
        }

        public Criteria andSellPointLessThan(String value) {
            addCriterion("sell_point <", value, "sellPoint");
            return (Criteria) this;
        }

        public Criteria andSellPointLessThanOrEqualTo(String value) {
            addCriterion("sell_point <=", value, "sellPoint");
            return (Criteria) this;
        }

        public Criteria andSellPointLike(String value) {
            addCriterion("sell_point like", value, "sellPoint");
            return (Criteria) this;
        }

        public Criteria andSellPointNotLike(String value) {
            addCriterion("sell_point not like", value, "sellPoint");
            return (Criteria) this;
        }

        public Criteria andSellPointIn(List<String> values) {
            addCriterion("sell_point in", values, "sellPoint");
            return (Criteria) this;
        }

        public Criteria andSellPointNotIn(List<String> values) {
            addCriterion("sell_point not in", values, "sellPoint");
            return (Criteria) this;
        }

        public Criteria andSellPointBetween(String value1, String value2) {
            addCriterion("sell_point between", value1, value2, "sellPoint");
            return (Criteria) this;
        }

        public Criteria andSellPointNotBetween(String value1, String value2) {
            addCriterion("sell_point not between", value1, value2, "sellPoint");
            return (Criteria) this;
        }

        public Criteria andPriceIsNull() {
            addCriterion("price is null");
            return (Criteria) this;
        }

        public Criteria andPriceIsNotNull() {
            addCriterion("price is not null");
            return (Criteria) this;
        }

        public Criteria andPriceEqualTo(Long value) {
            addCriterion("price =", value, "price");
            return (Criteria) this;
        }

        public Criteria andPriceNotEqualTo(Long value) {
            addCriterion("price <>", value, "price");
            return (Criteria) this;
        }

        public Criteria andPriceGreaterThan(Long value) {
            addCriterion("price >", value, "price");
            return (Criteria) this;
        }

        public Criteria andPriceGreaterThanOrEqualTo(Long value) {
            addCriterion("price >=", value, "price");
            return (Criteria) this;
        }

        public Criteria andPriceLessThan(Long value) {
            addCriterion("price <", value, "price");
            return (Criteria) this;
        }

        public Criteria andPriceLessThanOrEqualTo(Long value) {
            addCriterion("price <=", value, "price");
            return (Criteria) this;
        }

        public Criteria andPriceIn(List<Long> values) {
            addCriterion("price in", values, "price");
            return (Criteria) this;
        }

        public Criteria andPriceNotIn(List<Long> values) {
            addCriterion("price not in", values, "price");
            return (Criteria) this;
        }

        public Criteria andPriceBetween(Long value1, Long value2) {
            addCriterion("price between", value1, value2, "price");
            return (Criteria) this;
        }

        public Criteria andPriceNotBetween(Long value1, Long value2) {
            addCriterion("price not between", value1, value2, "price");
            return (Criteria) this;
        }

        public Criteria andNumIsNull() {
            addCriterion("num is null");
            return (Criteria) this;
        }

        public Criteria andNumIsNotNull() {
            addCriterion("num is not null");
            return (Criteria) this;
        }

        public Criteria andNumEqualTo(Integer value) {
            addCriterion("num =", value, "num");
            return (Criteria) this;
        }

        public Criteria andNumNotEqualTo(Integer value) {
            addCriterion("num <>", value, "num");
            return (Criteria) this;
        }

        public Criteria andNumGreaterThan(Integer value) {
            addCriterion("num >", value, "num");
            return (Criteria) this;
        }

        public Criteria andNumGreaterThanOrEqualTo(Integer value) {
            addCriterion("num >=", value, "num");
            return (Criteria) this;
        }

        public Criteria andNumLessThan(Integer value) {
            addCriterion("num <", value, "num");
            return (Criteria) this;
        }

        public Criteria andNumLessThanOrEqualTo(Integer value) {
            addCriterion("num <=", value, "num");
            return (Criteria) this;
        }

        public Criteria andNumIn(List<Integer> values) {
            addCriterion("num in", values, "num");
            return (Criteria) this;
        }

        public Criteria andNumNotIn(List<Integer> values) {
            addCriterion("num not in", values, "num");
            return (Criteria) this;
        }

        public Criteria andNumBetween(Integer value1, Integer value2) {
            addCriterion("num between", value1, value2, "num");
            return (Criteria) this;
        }

        public Criteria andNumNotBetween(Integer value1, Integer value2) {
            addCriterion("num not between", value1, value2, "num");
            return (Criteria) this;
        }

        public Criteria andBarcodeIsNull() {
            addCriterion("barcode is null");
            return (Criteria) this;
        }

        public Criteria andBarcodeIsNotNull() {
            addCriterion("barcode is not null");
            return (Criteria) this;
        }

        public Criteria andBarcodeEqualTo(String value) {
            addCriterion("barcode =", value, "barcode");
            return (Criteria) this;
        }

        public Criteria andBarcodeNotEqualTo(String value) {
            addCriterion("barcode <>", value, "barcode");
            return (Criteria) this;
        }

        public Criteria andBarcodeGreaterThan(String value) {
            addCriterion("barcode >", value, "barcode");
            return (Criteria) this;
        }

        public Criteria andBarcodeGreaterThanOrEqualTo(String value) {
            addCriterion("barcode >=", value, "barcode");
            return (Criteria) this;
        }

        public Criteria andBarcodeLessThan(String value) {
            addCriterion("barcode <", value, "barcode");
            return (Criteria) this;
        }

        public Criteria andBarcodeLessThanOrEqualTo(String value) {
            addCriterion("barcode <=", value, "barcode");
            return (Criteria) this;
        }

        public Criteria andBarcodeLike(String value) {
            addCriterion("barcode like", value, "barcode");
            return (Criteria) this;
        }

        public Criteria andBarcodeNotLike(String value) {
            addCriterion("barcode not like", value, "barcode");
            return (Criteria) this;
        }

        public Criteria andBarcodeIn(List<String> values) {
            addCriterion("barcode in", values, "barcode");
            return (Criteria) this;
        }

        public Criteria andBarcodeNotIn(List<String> values) {
            addCriterion("barcode not in", values, "barcode");
            return (Criteria) this;
        }

        public Criteria andBarcodeBetween(String value1, String value2) {
            addCriterion("barcode between", value1, value2, "barcode");
            return (Criteria) this;
        }

        public Criteria andBarcodeNotBetween(String value1, String value2) {
            addCriterion("barcode not between", value1, value2, "barcode");
            return (Criteria) this;
        }

        public Criteria andImageIsNull() {
            addCriterion("image is null");
            return (Criteria) this;
        }

        public Criteria andImageIsNotNull() {
            addCriterion("image is not null");
            return (Criteria) this;
        }

        public Criteria andImageEqualTo(String value) {
            addCriterion("image =", value, "image");
            return (Criteria) this;
        }

        public Criteria andImageNotEqualTo(String value) {
            addCriterion("image <>", value, "image");
            return (Criteria) this;
        }

        public Criteria andImageGreaterThan(String value) {
            addCriterion("image >", value, "image");
            return (Criteria) this;
        }

        public Criteria andImageGreaterThanOrEqualTo(String value) {
            addCriterion("image >=", value, "image");
            return (Criteria) this;
        }

        public Criteria andImageLessThan(String value) {
            addCriterion("image <", value, "image");
            return (Criteria) this;
        }

        public Criteria andImageLessThanOrEqualTo(String value) {
            addCriterion("image <=", value, "image");
            return (Criteria) this;
        }

        public Criteria andImageLike(String value) {
            addCriterion("image like", value, "image");
            return (Criteria) this;
        }

        public Criteria andImageNotLike(String value) {
            addCriterion("image not like", value, "image");
            return (Criteria) this;
        }

        public Criteria andImageIn(List<String> values) {
            addCriterion("image in", values, "image");
            return (Criteria) this;
        }

        public Criteria andImageNotIn(List<String> values) {
            addCriterion("image not in", values, "image");
            return (Criteria) this;
        }

        public Criteria andImageBetween(String value1, String value2) {
            addCriterion("image between", value1, value2, "image");
            return (Criteria) this;
        }

        public Criteria andImageNotBetween(String value1, String value2) {
            addCriterion("image not between", value1, value2, "image");
            return (Criteria) this;
        }

        public Criteria andCidIsNull() {
            addCriterion("cid is null");
            return (Criteria) this;
        }

        public Criteria andCidIsNotNull() {
            addCriterion("cid is not null");
            return (Criteria) this;
        }

        public Criteria andCidEqualTo(Long value) {
            addCriterion("cid =", value, "cid");
            return (Criteria) this;
        }

        public Criteria andCidNotEqualTo(Long value) {
            addCriterion("cid <>", value, "cid");
            return (Criteria) this;
        }

        public Criteria andCidGreaterThan(Long value) {
            addCriterion("cid >", value, "cid");
            return (Criteria) this;
        }

        public Criteria andCidGreaterThanOrEqualTo(Long value) {
            addCriterion("cid >=", value, "cid");
            return (Criteria) this;
        }

        public Criteria andCidLessThan(Long value) {
            addCriterion("cid <", value, "cid");
            return (Criteria) this;
        }

        public Criteria andCidLessThanOrEqualTo(Long value) {
            addCriterion("cid <=", value, "cid");
            return (Criteria) this;
        }

        public Criteria andCidIn(List<Long> values) {
            addCriterion("cid in", values, "cid");
            return (Criteria) this;
        }

        public Criteria andCidNotIn(List<Long> values) {
            addCriterion("cid not in", values, "cid");
            return (Criteria) this;
        }

        public Criteria andCidBetween(Long value1, Long value2) {
            addCriterion("cid between", value1, value2, "cid");
            return (Criteria) this;
        }

        public Criteria andCidNotBetween(Long value1, Long value2) {
            addCriterion("cid not between", value1, value2, "cid");
            return (Criteria) this;
        }

        public Criteria andStatusIsNull() {
            addCriterion("status is null");
            return (Criteria) this;
        }

        public Criteria andStatusIsNotNull() {
            addCriterion("status is not null");
            return (Criteria) this;
        }

        public Criteria andStatusEqualTo(Byte value) {
            addCriterion("status =", value, "status");
            return (Criteria) this;
        }

        public Criteria andStatusNotEqualTo(Byte value) {
            addCriterion("status <>", value, "status");
            return (Criteria) this;
        }

        public Criteria andStatusGreaterThan(Byte value) {
            addCriterion("status >", value, "status");
            return (Criteria) this;
        }

        public Criteria andStatusGreaterThanOrEqualTo(Byte value) {
            addCriterion("status >=", value, "status");
            return (Criteria) this;
        }

        public Criteria andStatusLessThan(Byte value) {
            addCriterion("status <", value, "status");
            return (Criteria) this;
        }

        public Criteria andStatusLessThanOrEqualTo(Byte value) {
            addCriterion("status <=", value, "status");
            return (Criteria) this;
        }

        public Criteria andStatusIn(List<Byte> values) {
            addCriterion("status in", values, "status");
            return (Criteria) this;
        }

        public Criteria andStatusNotIn(List<Byte> values) {
            addCriterion("status not in", values, "status");
            return (Criteria) this;
        }

        public Criteria andStatusBetween(Byte value1, Byte value2) {
            addCriterion("status between", value1, value2, "status");
            return (Criteria) this;
        }

        public Criteria andStatusNotBetween(Byte value1, Byte value2) {
            addCriterion("status not between", value1, value2, "status");
            return (Criteria) this;
        }

        public Criteria andCreatedIsNull() {
            addCriterion("created is null");
            return (Criteria) this;
        }

        public Criteria andCreatedIsNotNull() {
            addCriterion("created is not null");
            return (Criteria) this;
        }

        public Criteria andCreatedEqualTo(Date value) {
            addCriterion("created =", value, "created");
            return (Criteria) this;
        }

        public Criteria andCreatedNotEqualTo(Date value) {
            addCriterion("created <>", value, "created");
            return (Criteria) this;
        }

        public Criteria andCreatedGreaterThan(Date value) {
            addCriterion("created >", value, "created");
            return (Criteria) this;
        }

        public Criteria andCreatedGreaterThanOrEqualTo(Date value) {
            addCriterion("created >=", value, "created");
            return (Criteria) this;
        }

        public Criteria andCreatedLessThan(Date value) {
            addCriterion("created <", value, "created");
            return (Criteria) this;
        }

        public Criteria andCreatedLessThanOrEqualTo(Date value) {
            addCriterion("created <=", value, "created");
            return (Criteria) this;
        }

        public Criteria andCreatedIn(List<Date> values) {
            addCriterion("created in", values, "created");
            return (Criteria) this;
        }

        public Criteria andCreatedNotIn(List<Date> values) {
            addCriterion("created not in", values, "created");
            return (Criteria) this;
        }

        public Criteria andCreatedBetween(Date value1, Date value2) {
            addCriterion("created between", value1, value2, "created");
            return (Criteria) this;
        }

        public Criteria andCreatedNotBetween(Date value1, Date value2) {
            addCriterion("created not between", value1, value2, "created");
            return (Criteria) this;
        }

        public Criteria andUpdatedIsNull() {
            addCriterion("updated is null");
            return (Criteria) this;
        }

        public Criteria andUpdatedIsNotNull() {
            addCriterion("updated is not null");
            return (Criteria) this;
        }

        public Criteria andUpdatedEqualTo(Date value) {
            addCriterion("updated =", value, "updated");
            return (Criteria) this;
        }

        public Criteria andUpdatedNotEqualTo(Date value) {
            addCriterion("updated <>", value, "updated");
            return (Criteria) this;
        }

        public Criteria andUpdatedGreaterThan(Date value) {
            addCriterion("updated >", value, "updated");
            return (Criteria) this;
        }

        public Criteria andUpdatedGreaterThanOrEqualTo(Date value) {
            addCriterion("updated >=", value, "updated");
            return (Criteria) this;
        }

        public Criteria andUpdatedLessThan(Date value) {
            addCriterion("updated <", value, "updated");
            return (Criteria) this;
        }

        public Criteria andUpdatedLessThanOrEqualTo(Date value) {
            addCriterion("updated <=", value, "updated");
            return (Criteria) this;
        }

        public Criteria andUpdatedIn(List<Date> values) {
            addCriterion("updated in", values, "updated");
            return (Criteria) this;
        }

        public Criteria andUpdatedNotIn(List<Date> values) {
            addCriterion("updated not in", values, "updated");
            return (Criteria) this;
        }

        public Criteria andUpdatedBetween(Date value1, Date value2) {
            addCriterion("updated between", value1, value2, "updated");
            return (Criteria) this;
        }

        public Criteria andUpdatedNotBetween(Date value1, Date value2) {
            addCriterion("updated not between", value1, value2, "updated");
            return (Criteria) this;
        }
    }

    public static class Criteria extends GeneratedCriteria {

        protected Criteria() {
            super();
        }
    }

    public static class Criterion {
        private String condition;

        private Object value;

        private Object secondValue;

        private boolean noValue;

        private boolean singleValue;

        private boolean betweenValue;

        private boolean listValue;

        private String typeHandler;

        public String getCondition() {
            return condition;
        }

        public Object getValue() {
            return value;
        }

        public Object getSecondValue() {
            return secondValue;
        }

        public boolean isNoValue() {
            return noValue;
        }

        public boolean isSingleValue() {
            return singleValue;
        }

        public boolean isBetweenValue() {
            return betweenValue;
        }

        public boolean isListValue() {
            return listValue;
        }

        public String getTypeHandler() {
            return typeHandler;
        }

        protected Criterion(String condition) {
            super();
            this.condition = condition;
            this.typeHandler = null;
            this.noValue = true;
        }

        protected Criterion(String condition, Object value, String typeHandler) {
            super();
            this.condition = condition;
            this.value = value;
            this.typeHandler = typeHandler;
            if (value instanceof List<?>) {
                this.listValue = true;
            } else {
                this.singleValue = true;
            }
        }

        protected Criterion(String condition, Object value) {
            this(condition, value, null);
        }

        protected Criterion(String condition, Object value, Object secondValue, String typeHandler) {
            super();
            this.condition = condition;
            this.value = value;
            this.secondValue = secondValue;
            this.typeHandler = typeHandler;
            this.betweenValue = true;
        }

        protected Criterion(String condition, Object value, Object secondValue) {
            this(condition, value, secondValue, null);
        }
    }
}

3.cnki-manager-dao

TbItemMapper

package cn.cnki.mapper;

import cn.cnki.pojo.TbItem;
import cn.cnki.pojo.TbItemExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;

public interface TbItemMapper {
    int countByExample(TbItemExample example);

    int deleteByExample(TbItemExample example);

    int deleteByPrimaryKey(Long id);

    int insert(TbItem record);

    int insertSelective(TbItem record);

    List<TbItem> selectByExample(TbItemExample example);

    TbItem selectByPrimaryKey(Long id);

    int updateByExampleSelective(@Param("record") TbItem record, @Param("example") TbItemExample example);

    int updateByExample(@Param("record") TbItem record, @Param("example") TbItemExample example);

    int updateByPrimaryKeySelective(TbItem record);

    int updateByPrimaryKey(TbItem record);
}

TbItemMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="cn.cnki.mapper.TbItemMapper" >
  <resultMap id="BaseResultMap" type="cn.cnki.pojo.TbItem" >
    <id column="id" property="id" jdbcType="BIGINT" />
    <result column="title" property="title" jdbcType="VARCHAR" />
    <result column="sell_point" property="sellPoint" jdbcType="VARCHAR" />
    <result column="price" property="price" jdbcType="BIGINT" />
    <result column="num" property="num" jdbcType="INTEGER" />
    <result column="barcode" property="barcode" jdbcType="VARCHAR" />
    <result column="image" property="image" jdbcType="VARCHAR" />
    <result column="cid" property="cid" jdbcType="BIGINT" />
    <result column="status" property="status" jdbcType="TINYINT" />
    <result column="created" property="created" jdbcType="TIMESTAMP" />
    <result column="updated" property="updated" jdbcType="TIMESTAMP" />
  </resultMap>
  <sql id="Example_Where_Clause" >
    <where >
      <foreach collection="oredCriteria" item="criteria" separator="or" >
        <if test="criteria.valid" >
          <trim prefix="(" suffix=")" prefixOverrides="and" >
            <foreach collection="criteria.criteria" item="criterion" >
              <choose >
                <when test="criterion.noValue" >
                  and ${criterion.condition}
                </when>
                <when test="criterion.singleValue" >
                  and ${criterion.condition} #{criterion.value}
                </when>
                <when test="criterion.betweenValue" >
                  and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
                </when>
                <when test="criterion.listValue" >
                  and ${criterion.condition}
                  <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
                    #{listItem}
                  </foreach>
                </when>
              </choose>
            </foreach>
          </trim>
        </if>
      </foreach>
    </where>
  </sql>
  <sql id="Update_By_Example_Where_Clause" >
    <where >
      <foreach collection="example.oredCriteria" item="criteria" separator="or" >
        <if test="criteria.valid" >
          <trim prefix="(" suffix=")" prefixOverrides="and" >
            <foreach collection="criteria.criteria" item="criterion" >
              <choose >
                <when test="criterion.noValue" >
                  and ${criterion.condition}
                </when>
                <when test="criterion.singleValue" >
                  and ${criterion.condition} #{criterion.value}
                </when>
                <when test="criterion.betweenValue" >
                  and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
                </when>
                <when test="criterion.listValue" >
                  and ${criterion.condition}
                  <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >
                    #{listItem}
                  </foreach>
                </when>
              </choose>
            </foreach>
          </trim>
        </if>
      </foreach>
    </where>
  </sql>
  <sql id="Base_Column_List" >
    id, title, sell_point, price, num, barcode, image, cid, status, created, updated
  </sql>
  <select id="selectByExample" resultMap="BaseResultMap" parameterType="cn.cnki.pojo.TbItemExample" >
    select
    <if test="distinct" >
      distinct
    </if>
    <include refid="Base_Column_List" />
    from tb_item
    <if test="_parameter != null" >
      <include refid="Example_Where_Clause" />
    </if>
    <if test="orderByClause != null" >
      order by ${orderByClause}
    </if>
  </select>
  <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Long" >
    select
    <include refid="Base_Column_List" />
    from tb_item
    where id = #{id,jdbcType=BIGINT}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Long" >
    delete from tb_item
    where id = #{id,jdbcType=BIGINT}
  </delete>
  <delete id="deleteByExample" parameterType="cn.cnki.pojo.TbItemExample" >
    delete from tb_item
    <if test="_parameter != null" >
      <include refid="Example_Where_Clause" />
    </if>
  </delete>
  <insert id="insert" parameterType="cn.cnki.pojo.TbItem" >
    insert into tb_item (id, title, sell_point,
      price, num, barcode,
      image, cid, status,
      created, updated)
    values (#{id,jdbcType=BIGINT}, #{title,jdbcType=VARCHAR}, #{sellPoint,jdbcType=VARCHAR},
      #{price,jdbcType=BIGINT}, #{num,jdbcType=INTEGER}, #{barcode,jdbcType=VARCHAR},
      #{image,jdbcType=VARCHAR}, #{cid,jdbcType=BIGINT}, #{status,jdbcType=TINYINT},
      #{created,jdbcType=TIMESTAMP}, #{updated,jdbcType=TIMESTAMP})
  </insert>
  <insert id="insertSelective" parameterType="cn.cnki.pojo.TbItem" >
    insert into tb_item
    <trim prefix="(" suffix=")" suffixOverrides="," >
      <if test="id != null" >
        id,
      </if>
      <if test="title != null" >
        title,
      </if>
      <if test="sellPoint != null" >
        sell_point,
      </if>
      <if test="price != null" >
        price,
      </if>
      <if test="num != null" >
        num,
      </if>
      <if test="barcode != null" >
        barcode,
      </if>
      <if test="image != null" >
        image,
      </if>
      <if test="cid != null" >
        cid,
      </if>
      <if test="status != null" >
        status,
      </if>
      <if test="created != null" >
        created,
      </if>
      <if test="updated != null" >
        updated,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides="," >
      <if test="id != null" >
        #{id,jdbcType=BIGINT},
      </if>
      <if test="title != null" >
        #{title,jdbcType=VARCHAR},
      </if>
      <if test="sellPoint != null" >
        #{sellPoint,jdbcType=VARCHAR},
      </if>
      <if test="price != null" >
        #{price,jdbcType=BIGINT},
      </if>
      <if test="num != null" >
        #{num,jdbcType=INTEGER},
      </if>
      <if test="barcode != null" >
        #{barcode,jdbcType=VARCHAR},
      </if>
      <if test="image != null" >
        #{image,jdbcType=VARCHAR},
      </if>
      <if test="cid != null" >
        #{cid,jdbcType=BIGINT},
      </if>
      <if test="status != null" >
        #{status,jdbcType=TINYINT},
      </if>
      <if test="created != null" >
        #{created,jdbcType=TIMESTAMP},
      </if>
      <if test="updated != null" >
        #{updated,jdbcType=TIMESTAMP},
      </if>
    </trim>
  </insert>
  <select id="countByExample" parameterType="cn.cnki.pojo.TbItemExample" resultType="java.lang.Integer" >
    select count(*) from tb_item
    <if test="_parameter != null" >
      <include refid="Example_Where_Clause" />
    </if>
  </select>
  <update id="updateByExampleSelective" parameterType="map" >
    update tb_item
    <set >
      <if test="record.id != null" >
        id = #{record.id,jdbcType=BIGINT},
      </if>
      <if test="record.title != null" >
        title = #{record.title,jdbcType=VARCHAR},
      </if>
      <if test="record.sellPoint != null" >
        sell_point = #{record.sellPoint,jdbcType=VARCHAR},
      </if>
      <if test="record.price != null" >
        price = #{record.price,jdbcType=BIGINT},
      </if>
      <if test="record.num != null" >
        num = #{record.num,jdbcType=INTEGER},
      </if>
      <if test="record.barcode != null" >
        barcode = #{record.barcode,jdbcType=VARCHAR},
      </if>
      <if test="record.image != null" >
        image = #{record.image,jdbcType=VARCHAR},
      </if>
      <if test="record.cid != null" >
        cid = #{record.cid,jdbcType=BIGINT},
      </if>
      <if test="record.status != null" >
        status = #{record.status,jdbcType=TINYINT},
      </if>
      <if test="record.created != null" >
        created = #{record.created,jdbcType=TIMESTAMP},
      </if>
      <if test="record.updated != null" >
        updated = #{record.updated,jdbcType=TIMESTAMP},
      </if>
    </set>
    <if test="_parameter != null" >
      <include refid="Update_By_Example_Where_Clause" />
    </if>
  </update>
  <update id="updateByExample" parameterType="map" >
    update tb_item
    set id = #{record.id,jdbcType=BIGINT},
      title = #{record.title,jdbcType=VARCHAR},
      sell_point = #{record.sellPoint,jdbcType=VARCHAR},
      price = #{record.price,jdbcType=BIGINT},
      num = #{record.num,jdbcType=INTEGER},
      barcode = #{record.barcode,jdbcType=VARCHAR},
      image = #{record.image,jdbcType=VARCHAR},
      cid = #{record.cid,jdbcType=BIGINT},
      status = #{record.status,jdbcType=TINYINT},
      created = #{record.created,jdbcType=TIMESTAMP},
      updated = #{record.updated,jdbcType=TIMESTAMP}
    <if test="_parameter != null" >
      <include refid="Update_By_Example_Where_Clause" />
    </if>
  </update>
  <update id="updateByPrimaryKeySelective" parameterType="cn.cnki.pojo.TbItem" >
    update tb_item
    <set >
      <if test="title != null" >
        title = #{title,jdbcType=VARCHAR},
      </if>
      <if test="sellPoint != null" >
        sell_point = #{sellPoint,jdbcType=VARCHAR},
      </if>
      <if test="price != null" >
        price = #{price,jdbcType=BIGINT},
      </if>
      <if test="num != null" >
        num = #{num,jdbcType=INTEGER},
      </if>
      <if test="barcode != null" >
        barcode = #{barcode,jdbcType=VARCHAR},
      </if>
      <if test="image != null" >
        image = #{image,jdbcType=VARCHAR},
      </if>
      <if test="cid != null" >
        cid = #{cid,jdbcType=BIGINT},
      </if>
      <if test="status != null" >
        status = #{status,jdbcType=TINYINT},
      </if>
      <if test="created != null" >
        created = #{created,jdbcType=TIMESTAMP},
      </if>
      <if test="updated != null" >
        updated = #{updated,jdbcType=TIMESTAMP},
      </if>
    </set>
    where id = #{id,jdbcType=BIGINT}
  </update>
  <update id="updateByPrimaryKey" parameterType="cn.cnki.pojo.TbItem" >
    update tb_item
    set title = #{title,jdbcType=VARCHAR},
      sell_point = #{sellPoint,jdbcType=VARCHAR},
      price = #{price,jdbcType=BIGINT},
      num = #{num,jdbcType=INTEGER},
      barcode = #{barcode,jdbcType=VARCHAR},
      image = #{image,jdbcType=VARCHAR},
      cid = #{cid,jdbcType=BIGINT},
      status = #{status,jdbcType=TINYINT},
      created = #{created,jdbcType=TIMESTAMP},
      updated = #{updated,jdbcType=TIMESTAMP}
    where id = #{id,jdbcType=BIGINT}
  </update>
</mapper>

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>cn.cnki</groupId>
    <artifactId>cnki-manager</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  <artifactId>cnki-manager-dao</artifactId>
  <dependencies>
        <dependency>
            <groupId>cn.cnki</groupId>
            <artifactId>cnki-manager-pojo</artifactId>
            <version>0.0.1-SNAPSHOT</version>
        </dependency>
        <!-- Mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
        </dependency>
        <dependency>
            <groupId>com.github.miemiedev</groupId>
            <artifactId>mybatis-paginator</artifactId>
        </dependency>
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>3.4.2</version>
        </dependency>
        <!-- MySql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!-- 连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
        </dependency>
    </dependencies>
    <!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 -->
    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
    </build>
</project>

4.cnki-manager-interface

ItemService

package cn.cnki.service;

import cn.cnki.pojo.TbItem;

public interface ItemService {

    TbItem getItemById(long itemId);
}

5.cnki-manager-service

ItemServiceImpl

package cn.cnki.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import cn.cnki.mapper.TbItemMapper;
import cn.cnki.pojo.TbItem;
import cn.cnki.pojo.TbItemExample;
import cn.cnki.pojo.TbItemExample.Criteria;
import cn.cnki.service.ItemService;

@Service
public class ItemServiceImpl implements ItemService {

    @Autowired
    private TbItemMapper itemMapper;

    @Override
    public TbItem getItemById(long itemId) {
        //根据主键查询
        //TbItem tbItem = itemMapper.selectByPrimaryKey(itemId);
        TbItemExample example = new TbItemExample();
        Criteria criteria = example.createCriteria();
        //设置查询条件
        criteria.andIdEqualTo(itemId);
        //执行查询
        List<TbItem> list = itemMapper.selectByExample(example);
        if (list != null && list.size() > 0) {
            return list.get(0);
        }
        return null;
    }

}

6.cnki-manager-web

ItemController

package cn.cnki.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import cn.cnki.pojo.TbItem;
import cn.cnki.service.ItemService;

@Controller
public class ItemController {

    @Autowired
    private ItemService itemService;

    @RequestMapping("/item/{itemId}")
    @ResponseBody
    public TbItem getItemById(@PathVariable Long itemId) {
        TbItem tbItem = itemService.getItemById(itemId);
        return tbItem;
    }

}

7.重新运行cnki-manager

http://localhost:8080/item/536563