Mybatis整合Spring

MyBatis整合Spring框架的使用,需要用到的是包

mybatis-x.x.x.jar

mybatis-spring-x.x.x.jar

spring系列包，我使用的是spring3

数据库连接池使用c3p0

需要注意的是，建议在整合的时候使用3.1以上的mybatis-spring包

下面来一步一步的实现mybatis-spring整合

1，实体类：省略get和set方法

package com.tenghu.mybatis.model;
import java.io.Serializable;
public class Emp implements Serializable{
	private int id;
	private int age;
	private String name;

	public Emp(int id, int age, String name) {
		super();
		this.id = id;
		this.age = age;
		this.name = name;
	}
	public Emp() {
		super();
	}
}

2，映射文件：EmpMapper.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.tenghu.mybatis.mapper.EmpMapper">
	<!-- 查询所有数据 -->
	<select id="queryForList" resultType="Emp">
		select * from emp
	</select>
	
	<!-- 根据ID查询数据 -->
	<select id="queryEmpById" resultType="Emp">
		select * from emp where id=#{id}
	</select>
	
	<!-- 添加数据 -->
	<insert id="addEmp" parameterType="Emp">
		insert into emp values(#{name},#{id},#{age})
	</insert>
	
	<!-- 修改数据 -->
	<update id="updateEmp" parameterType="Emp">
		update emp 
		<set>
			<if test="name!=null">
				name=#{name},
			</if>
			<if test="age!=0">
				age=#{age}
			</if>
		</set>
		where id=#{id}
	</update>
	
	<!-- 删除数据 -->
	<delete id="deleteEmp" parameterType="int">
		delete from emp where id=#{id}
	</delete>
</mapper>

3，操作数据接口与实现类：

package com.tenghu.mybatis.inter;

import java.util.List;

import com.tenghu.mybatis.model.Emp;

public interface EmpManager {
	/**
	 * 查询所有数据
	 * @return
	 */
	public List<Emp> queryForList();
	
	/**
	 * 根据ID查询数据
	 * @param id
	 * @return
	 */
	public Emp queryEmpById(int id);
	
	/**
	 * 添加数据
	 * @param emp
	 * @return
	 */
	public int addEmp(Emp emp);
	
	/**
	 * 修改数据
	 * @param emp
	 * @return
	 */
	public int updateEmp(Emp emp);
	
	/**
	 * 删除数据
	 * @param id
	 * @return
	 */
	public int deleteEmp(int id);
}

package com.tenghu.mybatis.inter.impl;

import java.util.List;

import org.apache.ibatis.session.SqlSession;

import com.tenghu.mybatis.inter.EmpManager;
import com.tenghu.mybatis.model.Emp;

public class EmpManagerImpl implements EmpManager{
	private SqlSession sqlSession;
	private String namespace="com.tenghu.mybatis.mapper.EmpMapper.";

	@Override
	public List<Emp> queryForList() {
		return sqlSession.selectList(namespace+"queryForList");
	}

	public SqlSession getSqlSession() {
		return sqlSession;
	}

	public void setSqlSession(SqlSession sqlSession) {
		this.sqlSession = sqlSession;
	}

	@Override
	public Emp queryEmpById(int id) {
		return sqlSession.selectOne(namespace+"queryEmpById", id);
	}

	@Override
	public int addEmp(Emp emp) {
		return sqlSession.insert(namespace+"addEmp", emp);
	}

	@Override
	public int updateEmp(Emp emp) {
		return sqlSession.update(namespace+"updateEmp", emp);
	}

	@Override
	public int deleteEmp(int id) {
		return sqlSession.delete(namespace+"deleteEmp", id);
	}
}

4，mybatis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>
	<!-- 配置类别名 -->
	<typeAliases>
		<typeAlias alias="Emp" type="com.tenghu.mybatis.model.Emp"/>
	</typeAliases>
</configuration>

5，Spring配置文件：

<?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: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-2.5.xsd
			http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
			http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"
	default-autowire="byName">
	<!-- 引入属性文件 -->
	<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" scope="prototype">
		<property name="locations">
			<list>
				<value>classpath*:jdbc.properties</value>
			</list>
		</property>
	</bean>
	
	<!-- 配置数据源 -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" scope="prototype">
		<property name="driverClass" value="${mysql.driver}"/>
		<property name="jdbcUrl" value="${mysql.url}"/>
		<property name="user" value="${mysql.username}"/>
		<property name="password" value="${mysql.password}"/>
		<property name="maxPoolSize" value="100"/>
	</bean>
	
	<!-- 配置SqlSessionFactory -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean" scope="prototype">
		<property name="dataSource" ref="dataSource"/>
		<property name="configLocation" value="classpath:mybatis/mybatis-config.xml"/>
		<property name="mapperLocations" value="classpath*:com/tenghu/mybatis/mapper/*.xml"/>
	</bean>
	
	<!-- 配置SqlSession -->
	<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate" scope="prototype">
		<constructor-arg index="0" ref="sqlSessionFactory"/>
	</bean>
	
	<!-- 配置事务管理器 -->
	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" scope="prototype">
		<property name="dataSource" ref="dataSource"/>
	</bean>
	<!-- 使用申明式事务 -->
	<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>

<?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: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-2.5.xsd
			http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
			http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"
	default-autowire="byName">
	<bean id="empManagerImpl" class="com.tenghu.mybatis.inter.impl.EmpManagerImpl" scope="prototype"/>
</beans>

6，数据库属性文件：

mysql.driver=com.mysql.jdbc.Driver
mysql.url=jdbc:mysql://127.0.0.1:3306/company
mysql.username=root
mysql.password=xiaohu

7，工具类：

package com.tenghu.mybatis.util;

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

public class ApplicationContextUtil {
	private ApplicationContextUtil(){}
	private static ApplicationContext applicationContext;
	static{
		applicationContext=new ClassPathXmlApplicationContext("classpath*:spring/*.xml");
	}
	
	public static <T> T getBean(String names){
		return (T) applicationContext.getBean(names);
	}
}

8，测试类：

package com.tenghu.mybatis.test;

import java.util.List;

import org.junit.Test;

import com.tenghu.mybatis.inter.EmpManager;
import com.tenghu.mybatis.model.Emp;
import com.tenghu.mybatis.util.ApplicationContextUtil;

public class EmpManagerTest {
	/**
	 * 查询所有数据
	 */
	@Test
	public void testQueryForList(){
		EmpManager empManager=ApplicationContextUtil.getBean("empManagerImpl");
		List<Emp> empList=empManager.queryForList();
		for (Emp emp : empList) {
			System.out.println(emp.getAge()+"\t"+emp.getId()+"\t"+emp.getName());
		}
	}
	
	/**
	 * 根据ID查询数据
	 */
	@Test
	public void testQueryEmpById(){
		EmpManager empManager=ApplicationContextUtil.getBean("empManagerImpl");
		Emp emp=empManager.queryEmpById(6);
		System.out.println(emp.getAge()+"\t"+emp.getId()+"\t"+emp.getName());
	}
	
	/**
	 * 添加数据
	 */
	@Test
	public void testAddEmp(){
		EmpManager empManager=ApplicationContextUtil.getBean("empManagerImpl");
		Emp emp=new Emp(7, 34, "李思思");
		int result=empManager.addEmp(emp);
		System.out.println(result>0?"添加成功":"添加失败");
	}
	
	/**
	 * 修改数据
	 */
	@Test
	public void testUpdateEmp(){
		EmpManager empManager=ApplicationContextUtil.getBean("empManagerImpl");
		Emp emp=new Emp(7, 54, "李思思");
		int result=empManager.updateEmp(emp);
		System.out.println(result>0?"修改成功":"修改失败");
	}
	
	/**
	 * 删除数据
	 */
	@Test
	public void testDeleteEmp(){
		EmpManager empManager=ApplicationContextUtil.getBean("empManagerImpl");
		int result=empManager.deleteEmp(7);
		System.out.println(result>0?"删除成功":"删除失败");
	}
}

简单的mybatis整合spring框架就算实现了