package com.ij34.model;public class User {  private int id;  private String name;  private int age;  public int getId() {    return id;}public void setId(int id) {    this.id = id;}public String getName() {    return name;}public void setName(String name) {    this.name = name;}public int getAge() {    return age;}public void setAge(int age) {    this.age = age;}public String toString() {    return "User [id=" + id + ", name=" + name + ", age=" + age + "]";}}

package com.ij34.model;public interface UserMapper {         public User selectUser(int id);    public void insertUser(User user);    public void updateUser(User user);    public void deleteUser(String name);}

<?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.ij34.model.UserMapper">  <select id="selectUser" parameterType="int" resultType="User">    select * from users where id=#{id};  </select>    <update id="updateUser" keyProperty="id">    update users set name=#{name},age=#{age} where id=#{id}  </update>    <insert id="insertUser" >   insert into users(name,age)values(#{name},#{age})  </insert>  <delete id="deleteUser" >    delete from users where name=#{name}  </delete>  </mapper>

<?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.ij34.model.User" alias="User"/></typeAliases><!--  <environments default="development">    <environment id="development">      <transactionManager type="JDBC"/>      <dataSource type="POOLED">        <property name="driver" value="http://www.mamicode.com/com.mysql.jdbc.Driver"/>        <property name="url" value="http://www.mamicode.com/jdbc:mysql://localhost:3306/mybatis?useSSL=true"/>        <property name="username" value="http://www.mamicode.com/root"/>        <property name="password" value="http://www.mamicode.com/123456"/>      </dataSource>    </environment>  </environments>  -->  <mappers>  <mapper resource="com/ij34/mybatis/UserMapper.xml"/><!--    <mapper class="com.ij34.model.UserMapper"/> -->  </mappers></configuration>

<?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"       xsi:schemaLocation="            http://www.springframework.org/schema/beans            http://www.springframework.org/schema/beans/spring-beans-4.3.xsd            http://www.springframework.org/schema/context            http://www.springframework.org/schema/context/spring-context-4.3.xsd">    <!-- Showcase‘s CustomFreemarkerManager example -->  <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">     <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>      <property name="url" value="jdbc:mysql://localhost:3306/mybatis"></property>      <property name="username" value="root"></property>      <property name="password" value="123456"></property>   </bean>   <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">      <property name="dataSource" ref="dataSource"></property>      <property name="configLocation" value="com/ij34/mybatis/mybatis-config.xml"></property>  </bean>  <bean id="UserMapperFactory" class="org.mybatis.spring.mapper.MapperFactoryBean">      <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>      <property name="mapperInterface" value="com.ij34.model.UserMapper"></property>  </bean></beans>

package com.ij34.bean;import java.io.IOException;//import java.io.InputStream;//import java.util.List;////import org.apache.ibatis.io.Resources;//import org.apache.ibatis.session.SqlSession;//import org.apache.ibatis.session.SqlSessionFactory;//import org.apache.ibatis.session.SqlSessionFactoryBuilder;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.ij34.model.*;public class Test {public static void main(String[] args) throws IOException {   @SuppressWarnings("resource")ApplicationContext ac=new ClassPathXmlApplicationContext("com/ij34/mybatis/applicationContext.xml");   UserMapper mapper=(UserMapper) ac.getBean("UserMapperFactory");   User user=mapper.selectUser(3);  //查找   System.out.println(user);/*     User user=new User();     user.setId(9);     user.setName("小测01");     user.setAge(22);     mapper.insertUser(user);  //添加     System.out.println(user);*//*    User user=mapper.selectUser(8);    user.setName("大大A");    user.setAge(28);    mapper.updateUser(user);  //更改    System.out.println(user);*/ //  mapper.deleteUser("小测01");  //删除 //  System.out.println("已经删除：小测01");}}