mybatis框架

package com.tgb.model;

/**
 * 用户
 * @author liang
 *
 */
public class User {

    private int id;
    private String age;
    private String userName;
    public User(){
        super();
    }
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getAge() {
        return age;
    }
    public void setAge(String age) {
        this.age = age;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public User(int id, String age, String userName) {
        super();
        this.id = id;
        this.age = age;
        this.userName = userName;
    }
}

package com.tgb.mapper;

import java.util.List;

import com.tgb.model.User;

public interface UserMapper {

    void save(User user);
    boolean update(User user);
    boolean delete(int id);
    User findById(int id);
    List<User> findAll();
}

<?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">
<!-- 
    namespace：必须与对应的接口全类名一致
    id:必须与对应接口的某个对应的方法名一致
    
 -->
<mapper namespace="com.tgb.mapper.UserMapper">
    
    <insert id="save" parameterType="User">
        insert into t_user(user_name,user_age) values(#{userName},#{age})
    </insert>
    
    <update id="update" parameterType="User">
        update t_user set user_name=#{userName},user_age=#{age} where user_id=#{id}
    </update>
    
    <delete id="delete" parameterType="int">
        delete from t_user where user_id=#{id}
    </delete>
    
     <!-- mybsits_config中配置的alias类别名,也可直接配置resultType为类路劲 -->  
    <select id="findById" parameterType="int" resultType="User">
        select user_id id,user_name userName,user_age age from t_user where user_id=#{id}
    </select>
    
    <select id="findAll" resultType="User">
        select user_id id,user_name userName,user_age age from t_user
    </select>
    
</mapper>

<?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"
    xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">

    <!-- 1. 数据源 : DriverManagerDataSource -->
    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/mybatis" />
        <property name="username" value="root" />
        <property name="password" value="123456" />
    </bean>

    <!--
        2. mybatis的SqlSession的工厂: SqlSessionFactoryBean dataSource:引用数据源

        MyBatis定义数据源,同意加载配置
    -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="configLocation" value="classpath:config/mybatis-config.xml" /> 
    </bean>

    <!--
        3. mybatis自动扫描加载Sql映射文件/接口 : MapperScannerConfigurer sqlSessionFactory

        basePackage:指定sql映射文件/接口所在的包（自动扫描）
    -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.tgb.mapper"></property>
        <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
    </bean>

    <!--
        4. 事务管理 : DataSourceTransactionManager dataSource:引用上面定义的数据源
    -->
    <bean id="txManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!-- 5. 使用声明式事务
         transaction-manager：引用上面定义的事务管理器
     -->
    <tx:annotation-driven transaction-manager="txManager" />

</beans>

<?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>

    <!-- 实体类,简称 -设置别名 -->
    <typeAliases>
        <typeAlias alias="User" type="com.tgb.model.User" />
    </typeAliases>
    <!-- 实体接口映射资源 -->
    <!--
        说明：如果xxMapper.xml配置文件放在和xxMapper.java统一目录下，mappers也可以省略，因为org.mybatis.spring.mapper.MapperFactoryBean默认会去查找与xxMapper.java相同目录和名称的xxMapper.xml
    -->
    <mappers>
        <mapper resource="com/tgb/mapper/userMapper.xml" />
    </mappers>

</configuration>