Mybatis3.2和Spring3.x整合----Myb…

1. 工程主要文件

 

2. 主要jar包

mybatis-3.2.0.jar

mybatis-spring-1.1.1.jar

mysql-connector-java-3.1.13-bin.jar

log4j-1.2.11.jar

3. mybatis-config.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>

<properties resource="resources/jdbc.properties"></properties>

<typeAliases>

<!-- 导入此包下的所有类，相当于注册。。 -->

<package name="com.edu.mybatis_spring.model" />

</typeAliases>

 

<environments default="development">

<environment id="development">

<!-- 使用JDBC的事务管理 -->

<transactionManager type="JDBC" />

<dataSource type="POOLED">

<property name="username" value="${username}" />

<property name="password" value="${password}" />

<property name="driver" value="${driver}" />

<property name="url" value="${url}" />

</dataSource>

</environment>

</environments>

 

<mappers>

<mapper resource="com/edu/mybatis_spring/mapper/UserMapper.xml" />

</mappers>

</configuration>

 

4. UserMapper.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.edu.mybatis_spring.mapper.UserMapper">

<!--

当使用该Mybatis与Spring整合的时候，

xml文件必须和相应的Mapper接口文件同名，并在同一路径下

-->

<insert id="addUser" parameterType="User">

insert into tb_user(name, age) values(#{name}, #{age})

</insert>

 

<select id="getUserByName" resultType="User"

parameterType="java.lang.String">

select * from tb_user where name=#{name}

</select>

</mapper>

 

5. User.java

 

package com.edu.mybatis_spring.model;

 

 

public class User {

private int id;

private String name;

private int age;

/ 省略getter/setter方法

 

 

6. UserMapper.java

 

package com.edu.mybatis_spring.mapper;

 

import com.edu.mybatis_spring.model.User;

 

 

public interface UserMapper {

public void addUser(User user);

public User getUserByName(String username);

}

 

7. UserDaoImpl.java

package com.edu.mybatis_spring.dao.impl;

 

import org.apache.ibatis.session.SqlSession;

 

import com.edu.mybatis_spring.mapper.UserMapper;

import com.edu.mybatis_spring.model.User;

import com.edu.mybatis_spring.util.MybatisUtil;

 

 

public class UserDaoImpl implements UserMapper {

 

 

@Override

public void addUser(User user) {

SqlSession session = null;

 

try {

session = MybatisUtil.getSession();

session.getMapper(UserMapper.class).addUser(user);

session.commit();

} catch (Exception e) {

session.rollback();

e.printStackTrace();

} finally {

MybatisUtil.closeSession(session);

}

}

 

 

@Override

public User getUserByName(String username) {

return MybatisUtil.getSession().getMapper(UserMapper.class)

.getUserByName(username);

}

 

}

 

8. MybatisUtil.java

 

package com.edu.mybatis_spring.util;

 

import java.io.IOException;

import java.io.InputStream;

 

import org.apache.ibatis.io.Resources;

import org.apache.ibatis.session.SqlSession;

import org.apache.ibatis.session.SqlSessionFactory;

import org.apache.ibatis.session.SqlSessionFactoryBuilder;

 

 

public class MybatisUtil {

private static SqlSessionFactory sqlSessionFactory = null;

/ initialized SqlSessionFactory

static {

try {

InputStream is = Resources

.getResourceAsStream("resources/mybatis-config.xml");

sqlSessionFactory = new SqlSessionFactoryBuilder().build(is);

} catch (IOException e) {

e.printStackTrace();

}

}

 

public static SqlSessionFactory getSqlSessionFactory() {

return sqlSessionFactory;

}

 

 

public static SqlSession getSession() {

return sqlSessionFactory.openSession();

}

 

 

public static void closeSession(SqlSession session) {

session.close();

}

}

 

9. jdbc.properties

driver=com.mysql.jdbc.Driver

url=jdbc:mysql://localhost:3306/mybatis_spring?useUnicode=true&characterEncoding=UTF-8

username=root

password=mysql123

10. Init.sql

drop database mybatis_spring;

create database mybatis_spring;

use mybatis_spring;

 

drop table tb_user;

create table tb_user(

id int auto_increment,

name varchar(30),

age int(10),

primary key(id)

);

 

insert into tb_user(id, name, age) values(null, 'zhangsan', 20);

11. UserDaoImplTest

 

package com.edu.mybatis_spring.dao.impl;

 

import org.junit.After;

import static org.junit.Assert.*;

import org.junit.Before;

import org.junit.Test;

 

import com.edu.mybatis_spring.mapper.UserMapper;

import com.edu.mybatis_spring.model.User;

 

 

public class UserDaoImplTest {

 

private UserMapper userMapper = null;

 

@Before

public void setUp() throws Exception {

userMapper = new UserDaoImpl();

}

 

 

@After

public void tearDown() throws Exception {

userMapper = null;

}

 

 

@Test

public void testAddUser() {

User user = new User();

user.setName("lisi");

user.setAge(12);

userMapper.addUser(user);

assertNotNull("=========== userMapper.addUser(user) failure...", userMapper.getUserByName("lisi"));

}

 

 

@Test

public void testGetUserByName() {

assertNotNull(userMapper.getUserByName("lisi"));

}

 

}

 

12. 结果

 

 

12. 分析总结

         这是整合的第一步，暂时只是一个mybatis的工程。学过mybatis的对于这个工程理解很容易。mybatis和hibernate是比较相似的。都可以通过配置文件实现表和实体类的一一映射。只不过mybatis要写的sql还是比较原生态的，根直接操作数据库的sql语句基本一致。mybaits-config.xml文件配置了数据源以及运行需要的环境。当我们把spring整合进来后这个文件也就不需要了。这些配置都可以放在spring的配置文件里了。而且在实现类里也不再需要我们手动管理事务和SqlSessionFactory的管理。这些都可以spring管理。

    更多关于Mybatis的信息请看这里：

1. http://mybatis.github.io/mybatis-3/zh/

2. http://code.google.com/p/mybatis/

3. http://blog.csdn.net/weoln/article/details/5782750

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