mybatis+spring整合入门案例

com.frank.domain

　　User.java

package com.frank.domain;

public class User {
    private Integer id;
    private String name;
    private Integer 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 Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }
    public User(Integer id, String name, Integer age) {
        super();
        this.id = id;
        this.name = name;
        this.age = age;
    }
    public User() {
        super();
    }
    @Override
    public String toString() {
        return "User [id=" + id + ", name=" + name + ", age="
                + age + "]";
    }
    

}

com.frank.mapper

　　UserMapper.java

package com.frank.mapper;

import java.util.List;

import com.frank.domain.User;

public interface UserMapper {

    public void addUser(User user);

    public void delUser(Integer id);
    
    public User findById(Integer id);
    
    public List<User> findAll();
    
    public void updateUser(User user);


}

　　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.frank.mapper.UserMapper">
    
    <resultMap type="User" id="userResult">
        <result column="user_id" property="id"/>
        <result column="user_name" property="name"/>
        <result column="user_age" property="age"/>
    </resultMap>
    
    <insert id="addUser" parameterType ="User">
        insert into s_user(user_name,user_age) values(#{name},#{age})
    </insert>
    
    <delete id="delUser" parameterType="int">
        delete from s_user where user_id=#{id}
    </delete>

    <select id="findById" parameterType="int" resultMap="userResult">
        select * from s_user where user_id=#{id}
    </select>
    
    <select id="findAll" resultMap="userResult">
        select *  from s_user
    </select>
    
    <update id="updateUser" parameterType="User">
        update s_user set user_name=#{name},user_age=#{age} where user_id=#{id}
    </update>


</mapper>

com.frank.test

　　Test_mybatis.java

package com.frank.test;

import java.util.List;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.frank.domain.User;
import com.frank.mapper.UserMapper;


@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("/applicationContext.xml")
public class Test_mybatis {
    
    @Autowired
    private UserMapper userMapper;
    @Test
    public void testInsert(){
        User user=new User(null, "frank", 15);
        userMapper.addUser(user);
        
    }
    @Test
    public void testDel(){
        userMapper.delUser(5);
    }
    
    @Test
    public void testFindById(){
        User u = userMapper.findById(2);
        System.out.println(u);
    }
    @Test
    public void testFindAll(){
        List<User> list=userMapper.findAll();
        System.out.println(list);
    }
    

}

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:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"
    xmlns:tx="http://www.springframework.org/schema/tx">

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver">
        </property>
        <property name="url" value="jdbc:mysql://127.0.0.1:3306/mybatis">
        </property>
        <property name="username" value="root"></property>
        <property name="password" value="frank1994"></property>
    </bean>
    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>    
        <property name="typeAliasesPackage" value="com.frank.domain"></property>
    </bean>
    
    <!-- mybatis自动扫描，加载映射文件 -->
    <bean  class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.frank.mapper"></property>        
        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
     </bean>
     
     <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property> 
     </bean>
     
     <tx:annotation-driven transaction-manager="txManager" />

</beans>

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>
    
</configuration>