SSM框架整合图书管理项目

SSM框架整合

1、建立简单的maven项目

2、导入依赖

<?xml version="1.0" encoding="UTF-8"?>
<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>

    <groupId>org.example</groupId>
    <artifactId>SSM</artifactId>
    <version>1.0-SNAPSHOT</version>

    <!--导入依赖  Junit  数据库驱动  连接池  servlet  jsp  mybatis  mybatis-spring spring -->
    <dependencies>
        <!--junit-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>

        <!--数据库驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>6.0.6</version>
        </dependency>
        <!--数据库连接池-->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>
        <!--Servlet -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>
        <!--jsp-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.2</version>
        </dependency>
        <!--mybatis-spring-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.2</version>
        </dependency>
        <!--spring-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.1.9.RELEASE</version>
        </dependency>
        <!---->

    </dependencies>

    <!--静态资源导出问题-->
    <!--在build中配置resources，来防止我们资源导出失败的问题-->
    <build>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>
</project>

3、建立数据库连接（在schemas中选择连接的数据库）


4、建立相应的包

5、编写配置文件

• mybatis核心配置文件框架

<?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>

• spring核心配置文件框架

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       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.xsd">

</beans>

将连接数据库的一些操作封装起来

driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&serverTimezone=Asia/Shanghai
username=root
password=root

在mybatis核心配置文件中引入

<?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>

    <!--配置数据源 交给spring去做-->

    <!--起别名-->
    <typeAliases>
        <typeAlias type="com.zheng.pojo.Books" alias="Books"/>
    </typeAliases>

    <!--在mybatis核心配置文件中注册mapper文件-->
    <mappers>
        <mapper class="com.zheng.dao.BookMapper"/>
    </mappers>

</configuration>

编写实体类

package com.zheng.pojo;

public class Books {
    private int bookId;
    private String bookName;
    private int bookCounts;
    private String detail;

    public Books( ) {

    }
    public Books(int bookId, String bookName, int bookCounts, String detail) {
        this.bookId = bookId;
        this.bookName = bookName;
        this.bookCounts = bookCounts;
        this.detail = detail;
    }

    public int getBookId() {
        return bookId;
    }

    public void setBookId(int bookId) {
        this.bookId = bookId;
    }

    public String getBookName() {
        return bookName;
    }

    public void setBookName(String bookName) {
        this.bookName = bookName;
    }

    public int getBookCounts() {
        return bookCounts;
    }

    public void setBookCounts(int bookCounts) {
        this.bookCounts = bookCounts;
    }

    public String getDetail() {
        return detail;
    }

    public void setDetail(String detail) {
        this.detail = detail;
    }

    @Override
    public String toString() {
        return "Books{" +
                "bookId=" + bookId +
                ", bookName='" + bookName + '\'' +
                ", bookCounts=" + bookCounts +
                ", detail='" + detail + '\'' +
                '}';
    }
}

编写dao层

package com.zheng.dao;

import com.zheng.pojo.Books;

import java.util.List;

public interface BookMapper {
    /**
     * 增加一本书
     */
    int addBook(Books books);

    /**
     * 删除一本书
     */

    int deleteBookById(int id);

    /**
     * 更新一本书
     */

    int updateBook(Books books);

    /**
     * 查询所有的书籍
     */

    List<Books> queryAllBook();

    /**
     * 查询一本书籍通过id
     */

    Books queryBookById(int id);
}

编写对应的mapper文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.zheng.dao.BookMapper">

    <!--* 增加一本书-->
    <insert id="addBook" parameterType="Books">
        insert into ssmbuild.books (bookId,bookName,bookCounts,detail)
        values(#{bookId},#{bookName},#{bookCounts},#{detail})
    </insert>

    <!--* 删除一本书-->
    <delete id="deleteBookById" parameterType="int">
        delete from ssmbuild.books where bookId=#{bookId}
    </delete>

    <!-- * 更新一本书-->
    <update id="updateBook" parameterType="Books">
        update ssmbuild.books set bookId=#{bookId},bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail}
        where bookId=#{bookId}
    </update>

    <!--* 查询所有的书籍-->
    <select id="queryAllBook" parameterType="Books">
        select * from ssmbuild.books
    </select>

    <!--* 查询一本书籍通过id-->
    <select id="queryBookById" resultType="Books">
        select * from ssmbuild.books where bookId=#{bookId}
    </select>

</mapper>

编写service层（service调用dao层）

接口

package com.zheng.service;

import com.zheng.pojo.Books;

import java.util.List;

public interface BookService {
    /**
     * 增加一本书
     */
    int addBook(Books books);

    /**
     * 删除一本书
     */

    int deleteBookById(int id);

    /**
     * 更新一本书
     */

    int updateBook(Books books);

    /**
     * 查询所有的书籍
     */

    List<Books> queryAllBook();

    /**
     * 查询一本书籍通过id
     */

    Books queryBookById(int id);
}

编写接口实现子类

package com.zheng.service;

import com.zheng.dao.BookMapper;
import com.zheng.pojo.Books;

import java.util.List;

public class BookServiceImpl implements BookService{

    //业务层调用dao层，组合dao
    private BookMapper bookMapper;

    public void setBookMapper(BookMapper bookMapper) {
        this.bookMapper = bookMapper;
    }

    public int addBook(Books books) {
        return bookMapper.addBook(books);
    }

    public int deleteBookById(int id) {
        return bookMapper.deleteBookById(id);
    }

    public int updateBook(Books books) {
        return bookMapper.updateBook(books);
    }

    public List<Books> queryAllBook() {
        return bookMapper.queryAllBook();
    }

    public Books queryBookById(int id) {
        return bookMapper.queryBookById(id);
    }
}

整合mybatis

核心配置文件
mybatis-config.xml

<?xml version="1.0" encoding="UTF8"?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

    <!--配置数据源 交给spring去做-->

    <!--起别名-->
    <typeAliases>
        <typeAlias type="com.zheng.pojo.Books" alias="Books"/>
    </typeAliases>

    <!--在mybatis核心配置文件中注册mapper文件-->
    <mappers>
        <mapper class="com.zheng.dao.BookMapper"/>
    </mappers>

</configuration>

database.properties

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&serverTimezone=Asia/Shanghai
jdbc.username=root
jdbc.password=root

整合spring

• 整合dao接口
  spring-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:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <!--1、关联数据库配置文件-->
    <context:property-placeholder location="classpath:database.properties"></context:property-placeholder>

    <!--2、连接池
        dbcp:半自动连接，不能自动连接
        c3p0:自动化操作，自动化的加载配置文件，并且可以自动设置到对象中
        druid:hikari
    -->

    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>

        <!--c3p0连接池的私有属性-->
        <property name="maxPoolSize" value="30"></property>
        <property name="minPoolSize" value="10"/>
        <!--关闭连接后不自动commit-->
        <property name="autoCommitOnClose" value="false"/>
        <!--获取连接超时时间-->
        <property name="checkoutTimeout" value="10000"/>
        <!--当获取连接失败重试次数-->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>

    <!--3、sqlsessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--绑定mybatis的配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
    </bean>

    <!--4、配置dao接口扫描包，动态的实现Dao接口可以注入到spring容器中-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--注入sqlsessionFactory-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!--要扫描的包-->
        <property name="basePackage" value="com.zheng.dao"/>
    </bean>

</beans>

• 整合service接口
  spring-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:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    <!--扫描service下的包-->
    <context:component-scan base-package="com.zheng.service"/>

    <!--2、将我们的所有业务类，注入到spring，可以通过配置，或者注解实现-->
    <bean id="BookServiceImpl" class="com.zheng.service.BookServiceImpl">
        <property name="bookMapper" ref="bookMapper"/>
    </bean>

    <!--3、声明事务配置-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--注入数据源-->
        <property name="dataSource" ref="dataSource"/>

    </bean>

</beans>

整合spingmvc

1、给maven项目加入框架
2、配置web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <!--配置DispatchServlet；这个是springMVC的核心，请求分发器，前端控制器-->
    <servlet>
        <servlet-name>springMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <!--里边的路径是编写的配置文件-->
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>

        <!--启动级别-->
        <load-on-startup>1</load-on-startup>
    </servlet>

    <!--在springMVC中，/：代表匹配所有的请求，不包括jsp页面。/*：匹配所有的请求，包括jsp-->
    <servlet-mapping>
        <servlet-name>springMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--乱码过滤-->
    <filter>
        <filter-name>encodingFilter</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>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>

3、配置spring-mvc.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:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"

       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--1、注解驱动-->
    <mvc:annotation-driven/>
    <!--2、静态资源过滤-->
    <mvc:default-servlet-handler/>
    <!--3、自动扫描包(controller)-->
    <context:component-scan base-package="com.zheng.controller"/>
    <!--4、视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver">
        <!--前缀-->
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <!--后缀-->
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

测试

package com.zheng.controller;

import com.zheng.pojo.Books;
import com.zheng.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

@Controller
@RequestMapping("/book")
public class BookController {

    @Autowired
    @Qualifier("BookServiceImpl")
    private BookService bookService;

    //查询所有的书籍，并且返回一个书籍展示页面

    @RequestMapping("/queryAll")
    public String list(Model model){
        List<Books> books = bookService.queryAllBook();
        model.addAttribute("list:",books);
        return "allBook";
    }
}

遇到的问题：
1、lib文件的位置和class平级

applicationContext

<?xml version="1.0" encoding="UTF8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       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.xsd">

    <import resource="classpath:spring-dao.xml"/>
    <import resource="classpath:spring-service.xml"/>
    <import resource="classpath:spring-mvc.xml"/>

</beans>

2、编码字节无效
。将resources配置文件的utf-8写成utf8
mapper文件中的也要修改
3、在web.xml文件中地址位置改掉

    <!--里边的路径是编写的配置文件-->
            <param-value>classpath:applicationContext.xml</param-value>