Java基础-SSM之Spring和Mybatis整合案例

　　　　　　　　　　　　　　　　Java基础-SSM之Spring和Mybatis整合案例

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　作者：尹正杰

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 　　在之前我分享过mybatis和Spring的配置案例，想必大家对它们的配置已经很熟悉了，接下来我们把两者结合起来让他们一起来协同工作，帮我们在数据库中插入数据，编程起来是相当的方便。

一.准备环境

1>.案例分析

　　我们想要把一条数据插入到数据库中，利用Spring和mybatis插件来完成，大致的流程图如下：

2>.数据库配置创建测试数据表 

　　在编程之前，我们需要启动数据库，并在数据库中提前创建出我们需要用到的测试表。创建过程如下：

 create database yinzhengjie;

 use yinzhengjie;

 create table if not exists users(id int primary key auto_increment,name varchar(20) , age int) ;

二.实操演示

1>.创建新模块，引入Maven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>cn.org.yinzhengjie</groupId>
     <artifactId>MySpringMybatis</artifactId>
     <version>1.0-SNAPSHOT</version>

     <dependencies>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
             <version>4.11</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context-support</artifactId>
             <version>4.3.5.RELEASE</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-jdbc</artifactId>
             <version>4.3.5.RELEASE</version>
         </dependency>
         <dependency>
             <groupId>org.mybatis</groupId>
             <artifactId>mybatis</artifactId>
             <version>3.2.1</version>
         </dependency>
         <dependency>
             <groupId>org.mybatis</groupId>
             <artifactId>mybatis-spring</artifactId>
             <version>1.3.0</version>
         </dependency>
         <dependency>
             <groupId>c3p0</groupId>
             <artifactId>c3p0</artifactId>
             <version>0.9.1.2</version>
         </dependency>
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
             <version>5.1.17</version>
         </dependency>
         <dependency>
             <groupId>org.aspectj</groupId>
             <artifactId>aspectjrt</artifactId>
             <version>1.6.1</version>
         </dependency>
         <dependency>
             <groupId>org.aspectj</groupId>
             <artifactId>aspectjweaver</artifactId>
             <version>1.8.10</version>
         </dependency>
     </dependencies>
 </project>

2>.创建相应的包并编写代码

 /*
 @author :yinzhengjie
 Blog:http://www.cnblogs.com/yinzhengjie/tag/Java%E5%9F%BA%E7%A1%80/
 EMAIL:y1053419035@qq.com
 */
 package cn.org.yinzhengjie.sm.dao;

 import java.util.List;

 /**
  * Basedao,基本dao
  */
 public interface BaseDao<T> {
     public void insert(T t) ;
     public void update(T t) ;
     public void delete(Integer id) ;
     public T selectOne(Integer id) ;
     public List<T> selectAll() ;
 }

BaseDao.java 文件内容

 /*
 @author :yinzhengjie
 Blog:http://www.cnblogs.com/yinzhengjie/tag/Java%E5%9F%BA%E7%A1%80/
 EMAIL:y1053419035@qq.com
 */
 package cn.org.yinzhengjie.sm.dao.impl;

 import cn.org.yinzhengjie.sm.dao.BaseDao;
 import cn.org.yinzhengjie.sm.domain.User;
 import org.apache.ibatis.session.SqlSessionFactory;
 import org.mybatis.spring.support.SqlSessionDaoSupport;
 import org.springframework.stereotype.Repository;

 import javax.annotation.Resource;
 import java.util.List;

 /**
  *
  */
 @Repository("userDao")
 public class UserDaoImpl extends SqlSessionDaoSupport implements BaseDao<User> {

     public void insert(User user) {
         getSqlSession().insert("users.insert" , user) ;
     }

     public void update(User user) {
         getSqlSession().update("users.update", user);
     }

     public void delete(Integer id) {
         getSqlSession().delete("users.deleteOne", id);
     }

     public User selectOne(Integer id) {
         return getSqlSession().selectOne("users.selectOne", id);
     }

     public List<User> selectAll() {
         return getSqlSession().selectList("users.selectAll");
     }

     @Resource(name="sqlSessionFactory")
     public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
         super.setSqlSessionFactory(sqlSessionFactory);
     }
 }

UserDaoImpl.java 文件内容

 /*
 @author :yinzhengjie
 Blog:http://www.cnblogs.com/yinzhengjie/tag/Java%E5%9F%BA%E7%A1%80/
 EMAIL:y1053419035@qq.com
 */
 package cn.org.yinzhengjie.sm.service;

 import java.util.List;

 /**
  * Created by Administrator on 2018/7/12.
  */
 public interface BaseService<T> {
     public void insert(T t);

     public void update(T t);

     public void delete(Integer id);

     public T selectOne(Integer id);

     public List<T> selectAll();
 }

BaseService.java 文件内容

 /*
 @author :yinzhengjie
 Blog:http://www.cnblogs.com/yinzhengjie/tag/Java%E5%9F%BA%E7%A1%80/
 EMAIL:y1053419035@qq.com
 */
 package cn.org.yinzhengjie.sm.service.impl;

 import cn.org.yinzhengjie.sm.dao.BaseDao;
 import cn.org.yinzhengjie.sm.domain.User;
 import cn.org.yinzhengjie.sm.service.BaseService;
 import org.springframework.stereotype.Service;

 import javax.annotation.Resource;
 import java.util.List;

 /**
  * 用户服务实现类
  */
 @Service("userService")
 public class UserServiceImpl implements BaseService<User> {

     @Resource(name="userDao")
     private BaseDao<User> userDao ;

     public void insert(User user) {
         userDao.insert(user);
     }

     public void update(User user) {
         userDao.update(user);
     }

     public void delete(Integer id) {
         userDao.delete(id);
     }

     public User selectOne(Integer id) {
         return userDao.selectOne(id);
     }

     public List<User> selectAll() {
         return userDao.selectAll();
     }
 }

UserServiceImpl.java 文件内容

 /*
 @author :yinzhengjie
 Blog:http://www.cnblogs.com/yinzhengjie/tag/Java%E5%9F%BA%E7%A1%80/
 EMAIL:y1053419035@qq.com
 */
 package cn.org.yinzhengjie.sm.domain;

 /**
  */
 public class User {
     private Integer id;
     private String name;
     private int age;

     public Integer getId() {
         return id;
     }

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

     public String getName() {
         return name;
     }

     public void setName(String name) {
         this.name = name;
     }

     public int getAge() {
         return age;
     }

     public void setAge(int age) {
         this.age = age;
     }
 }

User.java 文件内容

3>.编写mybatis的配置文件

 <?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>
     <typeAliases>
         <typeAlias type="cn.org.yinzhengjie.sm.domain.User"    alias="_User" />
     </typeAliases>
     <mappers>
         <mapper resource="UserMapper.xml"/>
     </mappers>
 </configuration>

mybatis-config.xml 文件内容

 <?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">
 <!-- 定义名字空间 -->
 <mapper namespace="users">
     <insert id="insert">
         insert into users(name, age) values(#{name}, #{age}) ;
     </insert>

     <update id="update">
         update users set name = #{name} , age = #{age} where id = #{id}
     </update>

     <delete id="deleteOne">
         delete from users where id = #{id}
     </delete>

     <select id="selectOne" resultType="_User">
         select * from users where id = #{id}
     </select>

     <select id="selectAll" resultType="_User">
         select * from users
     </select>

 </mapper>

UserMapper.xml 文件内容

4>.编写Spring的配置文件（环绕通知，文件名为：beans.xml）

 <?xml version="1.0"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:aop="http://www.springframework.org/schema/aop"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:tx="http://www.springframework.org/schema/tx"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
                         http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
                         http://www.springframework.org/schema/aop
                         http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
                         http://www.springframework.org/schema/context
                         http://www.springframework.org/schema/context/spring-context-4.3.xsd
                         http://www.springframework.org/schema/tx
                         http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
     <context:component-scan base-package="cn.org.yinzhengjie.sm.service,cn.org.yinzhengjie.sm.dao" />
     <!-- 数据源 -->
     <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
         <property name="driverClass" value="com.mysql.jdbc.Driver"/>
         <property name="jdbcUrl" value="jdbc:mysql://localhost:5200/yinzhengjie"/>
         <property name="user" value="root"/>
         <property name="password" value="yinzhengjie"/>
         <property name="maxPoolSize" value="10"/>
         <property name="minPoolSize" value="2"/>
         <property name="initialPoolSize" value="3"/>
         <property name="acquireIncrement" value="2"/>
     </bean>

     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
         <property name="dataSource" ref="dataSource"/>
         <property name="configLocation" value="classpath:mybatis-config.xml"/>
     </bean>

     <!-- 事务管理器，在servie层面上实现事务管理的。 -->
     <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
         <property name="dataSource" ref="dataSource" />
     </bean>

     <!-- 事务通知 -->
     <tx:advice id="txAdvicd" transaction-manager="txManager">
         <tx:attributes>
             <tx:method name="insert*" propagation="REQUIRED" isolation="DEFAULT" />
             <tx:method name="update*" propagation="REQUIRED" isolation="DEFAULT" />
             <tx:method name="delete*" propagation="REQUIRED" isolation="DEFAULT" />
             <tx:method name="select*" propagation="REQUIRED" isolation="DEFAULT" read-only="true" />
             <tx:method name="*" propagation="REQUIRED" isolation="DEFAULT" />
         </tx:attributes>
     </tx:advice>

     <!-- 定义环绕通知 -->
     <aop:config>
         <aop:advisor pointcut="execution(* *..*Service.*(..))" advice-ref="txAdvicd" />
     </aop:config>
 </beans>

5>.新建包名（cn.org.yinzhengjie.sm.main）， 编写测试代码如下：

 /*
 @author :yinzhengjie
 Blog:http://www.cnblogs.com/yinzhengjie/tag/Java%E5%9F%BA%E7%A1%80/
 EMAIL:y1053419035@qq.com
 */
 package cn.org.yinzhengjie.sm.main;

 import cn.org.yinzhengjie.sm.domain.User;
 import cn.org.yinzhengjie.sm.service.BaseService;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.support.ClassPathXmlApplicationContext;

 public class Demo {
     public static void main(String[] args) {
         ApplicationContext ac = new ClassPathXmlApplicationContext("beans.xml");
         BaseService service = (BaseService) ac.getBean("userService");
         User user = new User();
         user.setName("YinZhengJie");
         user.setAge(18);
         service.insert(user);

         User yzj = (User)service.selectOne(1);
         System.out.println(yzj.getName());
     }
 }

　　以上代码执行结果如下：

6>.运行第5步的测试代码，并查看数据库信息：