JavaEE框架——mybatis和spring整合

Posted 2022-12-03 wangjian_an

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mybatis和spring的联合使用

当前主流的框架已经不是ssh了，前台偏向于springMvc代替struts ,后台的mybatis/ibatis的流行程度则超过了hibernate了，只有spring框架一直是流行框架里的中流砥柱。mybatis如何与spring交互呢？我为大家演示一下简单的交互过程。

整合版本：spring4.3.2和mybatis3.4.1
需要的核心整合jar包：mybatis-spring-1.3.0.jar（如果是其他版本，在网上找最新的连接包
https://github.com/mybatis）
其他相关的核心包请自行添加

连接步骤

在项目里写上spring的配置文件application.xml(src目录下）

<?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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-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
                http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd ">
    <!-- 配置数据源 -->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url" value="jdbc:mysql:///mybatis?characterEncoding=UTF-8"></property>
         <property name="username" value="root"></property>
         <property name="password" value="1234"></property>
    </bean>

     <!-- 配置事务 -->

    <aop:aspectj-autoproxy></aop:aspectj-autoproxy><!-- 开启自动代理 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean><!-- 设置数据源正式项目用DataSourceTransactionManager 测试用SimpleTransactionManager-->
    <tx:advice id="txAdive" transaction-manager="txManager"><!-- 设置通知 -->
        <tx:attributes>
            <tx:method name="*" propagation="REQUIRED"/>
        </tx:attributes>
    </tx:advice>
    <tx:annotation-driven proxy-target-class="false" transaction-manager="txManager"/><!-- 加载管理驱动 -->
    <aop:config><!-- 切面设置 -->
        <aop:pointcut expression="excution( * cn.hncu..*.(..))" id="pointcut"/>
        <!-- <aop:advisor advice-ref="txManager" pointcut-ref="pointcut"/> 可以-->
        <aop:advisor advice-ref="txAdive"/>
    </aop:config>
    <!-- 配置mybatis -->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation" >
            <value>classpath:mybatis-config.xml</value>
        </property>
    </bean>
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactoryBean"></constructor-arg>
    </bean>

    <!-- 配置业务bean -->
    <bean id="userDao" class="cn.hncu.dao.UserDaoJdbc"><!-- 手动配置 -->
        <property name="sqlSession" ref="sqlSession"></property>
    </bean>
    <bean id="userService" class="cn.hncu.service.UserService">
        <property name="dao" ref="userDao"></property>
    </bean>

    <bean id="userDao2" class="cn.hncu.dao.UserDaoJdbc2"> <!-- daoJdbc利用spring自动配置 -->
        <!-- <property name="sqlSessionFactory" ref="sqlSessionFactoryBean"></property> -->
        <property name="sqlSessionTemplate" ref="sqlSession"></property>
    </bean>
    <bean id="userService2" class="cn.hncu.service.UserService">
        <property name="dao" ref="userDao2"></property>
    </bean>
</beans>

2.写javaBean User.java

package cn.hncu.domain;

public class User 
    private String id;
    private String name;
    private String pwd;
    public String getId() 
        return id;
    
    public void setId(String id) 
        this.id = id;
    
    public String getName() 
        return name;
    
    public void setName(String name) 
        this.name = name;
    
    public String getPwd() 
        return pwd;
    
    public void setPwd(String pwd) 
        this.pwd = pwd;
    
    @Override
    public String toString() 
        return "User [id=" + id + ", name=" + name + ", pwd=" + pwd + "]";

3.配置mybatis-config.xml和User.xml
mybatis-config.xml(项目src目录下）

<?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.hncu.domain.User"  alias="User"/>
    </typeAliases>
    <mappers>
        <mapper resource="cn/hncu/domain/User.xml" />
    </mappers>
</configuration>

User.xml（User.java同目录）

<?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="user">
    <select id="all" resultType="User" >
        select *from users
    </select>
     <insert id="insert" parameterType="User">
        insert into users(id,name,pwd) values(#id,#name,#pwd)
    </insert>
</mapper>

3.设置dao层：
UserDao.java

package cn.hncu.dao;

import java.util.List;

import cn.hncu.domain.User;

public interface UserDAO 
    public List<User> query();

    public void insert(User user);

UserDaoJdbc.java（纯底层模式）

package cn.hncu.dao;

import java.util.List;

import org.apache.ibatis.session.SqlSession;

import cn.hncu.domain.User;

public class UserDaoJdbc implements UserDAO 
    private SqlSession sqlSession;
    @Override
    public List<User> query() 
        return sqlSession.selectList("all");
    
    public SqlSession getSqlSession() 
        return sqlSession;
    
    public void setSqlSession(SqlSession sqlSession) 
        this.sqlSession = sqlSession;
    
    @Override
    public void insert(User user) 
         getSqlSession().insert("insert", user);

UserDaoJdbc2.java（继承SqlSessionDaoSupport模式）

package cn.hncu.dao;

import java.util.List;
import org.mybatis.spring.support.SqlSessionDaoSupport;

import cn.hncu.domain.User;

public class UserDaoJdbc2 extends SqlSessionDaoSupport implements UserDAO 

    @Override
    public List<User> query() 
        return getSqlSession().selectList("all");
    
    @Override
    public void insert(User user) 
         getSqlSession().insert("insert", user);

4.service层
IStudService.java

package cn.hncu.service;

import java.util.List;

import cn.hncu.domain.User;

public interface IUserService 
    public List<User> query();
    public void insert(User user,User user2);

StudServiceImpl.java

package cn.hncu.service;

import java.util.List;

import cn.hncu.dao.UserDAO;
import cn.hncu.domain.User;

public class UserService implements IUserService 
    private UserDAO dao;
    @Override
    public List<User> query() 
        return dao.query();
    
    public UserDAO getDao() 
        return dao;
    
    public void setDao(UserDAO dao) 
        this.dao = dao;
    
    @Override
    public void insert(User user,User user2) 
        dao.insert(user);
        dao.insert(user2);

5.测试代码：
测试代码一：
Demo.java

package cn.hncu;

import java.sql.SQLException;
import java.util.List;

import javax.sql.DataSource;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.junit.Test;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;

import cn.hncu.domain.User;

public class Demo 

    @Test//测试dataSource
    public void demo()
        ApplicationContext act=new ClassPathXmlApplicationContext("applicationContent.xml");
        DataSource ds=act.getBean("dataSource", DataSource.class);
        System.out.println(ds);
    
    @Test//测试SqlSessionFactory
    public void demo2() throws SQLException
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContent.xml");
        SqlSessionFactory ssf = (SqlSessionFactory) ctx.getBean("sqlSessionFactoryBean");
        SqlSession s = ssf.openSession();
        System.out.println( s );
    

    //坑:版本匹配----mybatis-3.4.1 配 mybatis-spring-1.3.0
    @Test//测试SqlSessionTemplate
    public void demo3()
        ApplicationContext act=new ClassPathXmlApplicationContext("applicationContent.xml");
        SqlSession s=act.getBean("sqlSession", SqlSession.class);
        System.out.println(s);
        List<User> list=s.selectList("all");
        System.out.println(list);

测试代码二：
Demo2.java

package cn.hncu;

import java.util.List;
import java.util.UUID;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import cn.hncu.domain.User;
import cn.hncu.service.IUserService;

public class Demo2 
    @Test//测试spring+mybatis---service+dao  --dao完全是我们自己写
    public void demo()
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContent.xml");
        IUserService service = ctx.getBean("userService", IUserService.class);
        List<User> list=service.query();
        System.out.println(list);
    
    @Test//测试spring+mybatis---service+dao   ----mybatis推荐的方式: dao继承SqlSessionDaoSupport
    public void demo2()
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContent.xml");
        IUserService service = ctx.getBean("userService2", IUserService.class);
        List<User> list=service.query();
        System.out.println(list);
    
    @Test//测试事务
    public void demo3()
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContent.xml");
        IUserService service = ctx.getBean("userService2", IUserService.class);
        User user=new User();
        user.setId(UUID.randomUUID().toString().replaceAll("-", ""));
        user.setName("1111");
        user.setPwd("1111");
        User user2=new User();
        user2.setId(UUID.randomUUID().toString().replaceAll("-", ""));
        user2.setName("222222222222222222222222222222222222222222222" +
                "222222222222222222222222222222222222222222222222222222222" +
                "222222222222222222222222222222222222222222222222222222222222" +
                "2222222222222222222222222222222222222222222222222222222222222222222222" +
                "22222222222222222222222222222222222222222222222222222222");
        user2.setPwd("2222");
        service.insert(user, user2);

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