spring与mybatis集成和事务控制

2022-10-25 18:53:12

一个. 基本介绍

本文将使用spring整合mybatis, 并加入事务管理, 以此为记, 方便以后查阅。

二. 样例

1. 代码结构图：

2. 建表语句：

DROP DATABASE test;

CREATE DATABASE test;  

USE test;  

CREATE TABLE USER(

  id VARCHAR(36) PRIMARY KEY,

  username VARCHAR(64),

  address VARCHAR(128)

)  

INSERT INTO USER (id, username, address) VALUES("001", "zhangsan", "Wuhan");

INSERT INTO USER (id, username, address) VALUES("002", "lisi", "Shanghai");

3. 实体类：

public class User {

	private String id;

	private String uname;

	private String address;

	@Override

	public String toString() {

		return "id: " + id + ", uname: " + uname + ", address: " + address;

	}

}

// 省略getter与setter方法

4. 实体映射配置：user.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="com.zdp.domain.User">

	<resultMap type="User" id="userBean">

		<id column="id" property="id"/>

		<result column="username" property="uname"/>

		<result column="address" property="address"/>

	</resultMap>

	<select id="selectUserById" parameterType="string" resultMap="userBean">

		select * from user where id = #{id}

	</select>

	<update id="updateUserByCondition" parameterType="User">

		update user

		<set>

			<if test="uname != null">

				username = #{uname} ,

			</if>

			<if test="address != null">

				address = #{address}

			</if>

		</set>

		where id = #{id}

	</update>

</mapper>

动态更新user

5. service接口：

public interface UserService {

	void updateUser(User user);

}

6. service实现：

public class UserServiceImpl implements UserService {

	private UserDao userDao;

	public void setUserDao(UserDao userDao) {

		this.userDao = userDao;

	}

	@Override

	public void updateUser(User user) {

		userDao.updateUser(user);

		System.out.println(1/0); // 执行时异常

	}

}

7. dao接口：

public interface UserDao {

	User findUserById(String id);

	void updateUser(User user);

}

8. dao实现：

public class UserDaoImpl extends SqlSessionDaoSupport implements UserDao {

	@Override

	public User findUserById(String id) {

		SqlSession sqlSession = super.getSqlSession();

		User user = (User) sqlSession.selectOne(User.class.getName() + ".selectUserById", id);

		return user;

	}

	@Override

	public void updateUser(User user) {

		super.getSqlSession().update(User.class.getName() + ".updateUserByCondition", user);

	}

}

9. mybatis全局配置：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>

	<typeAliases>

		<typeAlias type="com.zdp.domain.User" alias="User"/>

	</typeAliases>

	<mappers>

		<!-- 映射文件的位置  -->

		<mapper resource="com/zdp/domain/User.xml" />

	</mappers>

</configuration>

10. spring配置：ApplicationContext.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:aop="http://www.springframework.org/schema/aop"

	xmlns:tx="http://www.springframework.org/schema/tx"

	xsi:schemaLocation="http://www.springframework.org/schema/beans

    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

    http://www.springframework.org/schema/context

    http://www.springframework.org/schema/context/spring-context-3.0.xsd

    http://www.springframework.org/schema/tx

    http://www.springframework.org/schema/tx/spring-tx-3.0.xsd

    http://www.springframework.org/schema/aop

    http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

	<!-- 配置数据源 -->

	<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">

		<property name="driverClassName" value="com.mysql.jdbc.Driver"/>

		<property name="url" value="jdbc:mysql:///test"/>

		<property name="username" value="root"/>

		<property name="password" value="root"/>

	</bean>

	<!-- session工厂 -->

	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">

		<property name="dataSource" ref="dataSource" />

		<!-- mybatis总配置文件的位置 -->

		<property name="configLocation" value="classpath:sqlMapConfig.xml"/>

	</bean>

	<!-- 配置事务管理 -->

	<bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

		<property name="dataSource" ref="dataSource"/>

	</bean>

	<tx:advice id="transactionAdvice" transaction-manager="transactionManager">

	    <tx:attributes>

	        <tx:method name="delete*" propagation="REQUIRED" />

	        <tx:method name="save*" propagation="REQUIRED" />

	        <tx:method name="update*" propagation="REQUIRED" />

	        <tx:method name="find*" read-only="true" />

	        <tx:method name="get*" read-only="true" />

	        <tx:method name="select*" read-only="true" />

	    </tx:attributes>

	</tx:advice>  

	<aop:config>

	    <!-- 第一个"*"代表全部类, 第二个"*"代表全部方法, ".."代表随意參数 -->

	    <aop:pointcut id="pointcut" expression="execution(* com.zdp.service.*.*(..))" />  

	    <!-- 把事务控制在service层 -->

	    <aop:advisor pointcut-ref="pointcut" advice-ref="transactionAdvice" />

	</aop:config> 

	<!-- 业务处理 -->

	<bean id="userDao" class="com.zdp.dao.impl.UserDaoImpl">

		<property name="sqlSessionFactory" ref="sqlSessionFactory" />

	</bean>

	<bean id="userService" class="com.zdp.service.impl.UserServiceImpl">

		<property name="userDao" ref="userDao"/>

	</bean>

</beans>

11. junit測试：

public class SpringTest {

	private ApplicationContext context;

	@Before

	public void sprintInit() {

		context = new ClassPathXmlApplicationContext("ApplicationContext.xml");

	}

	@Test

	public void testFindUserById() {

		UserDao userDao = (UserDao) context.getBean("userDao");

		User user = userDao.findUserById("001");

		System.out.println(user);

	}	

	@Test

	public void testUpdateUser() {

		UserService userService = (UserService) context.getBean("userService");

		User user = new User();

		user.setId("001");

		user.setUname("zhangsan1");

		userService.updateUser(user);

	}

}

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