Mybatis——helloWorld级程序

 <?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>
     <settings>
         <setting name="defaultStatementTimeout" value="1000"/>
     </settings>
     <typeAliases>
         <typeAlias alias="user" type="com.pt.User"/>
     </typeAliases>
     <environments default="development">
         <environment id="development">
             <transactionManager type="JDBC" />
             <!-- 配置数据库连接信息 -->
             <dataSource type="POOLED">
                 <property name="driver" value="com.mysql.jdbc.Driver" />
                 <property name="url" value="jdbc:mysql://localhost:8066/TESTDB" />
                 <property name="username" value="test" />
                 <property name="password" value="test" />
             </dataSource>
         </environment>
     </environments>
     <mappers>
             <mapper resource="com/pt/map/UserMap.xml"/>
     </mappers>
 </configuration>

conf.xml

 package com.pt;

 public class User {
     public int userId;
     public String userName;
     public int getUserId() {
         return userId;
     }
     public void setUserId(int userId) {
         this.userId = userId;
     }
     public String getUserName() {
         return userName;
     }
     public void setUserName(String userName) {
         this.userName = userName;
     }

 }

User.java

 <?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.pt.map.UserMap">
     <resultMap type="user" id="userMap">
     <!--property值 是类的成员名，column 是数据库字段名  -->
         <result property="userId" column="id" />
         <result property="userName" column="name" />
     </resultMap>
     <select id="getUser" parameterType="int" resultMap="userMap">
         select * from test where id=#{id}
     </select>

     <insert id="addUser" parameterType="user" timeout="1">
         insert into test(id,name) values(#{userId},#{userName})
     </insert>
 </mapper>

UserMap.xml

 package com.pt;

 import java.io.Reader;
 import java.util.Date;

 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.junit.AfterClass;
 import org.junit.BeforeClass;
 import org.junit.Test;

 public class TestUser {
     //mybatis的配置文件
     static String resource = "conf.xml";
     //使用MyBatis提供的Resources类加载mybatis的配置文件（它也加载关联的映射文件）
     static Reader reader = null;
     //构建sqlSession的工厂
     static SqlSessionFactory sessionFactory = null;
     //创建能执行映射文件中sql的sqlSession
     static SqlSession session = null;
     @BeforeClass
     public static void setUp()throws Exception{
         reader = Resources.getResourceAsReader(resource);
         //构建sqlSession的工厂
         sessionFactory = new SqlSessionFactoryBuilder().build(reader);
         //创建能执行映射文件中sql的sqlSession
         session = sessionFactory.openSession();
         System.out.println("开始测试之前~~~~~~~~~"+ new Date());
     }

     @AfterClass
     public static void tearDown(){
         System.out.println("开始完成之后~~~~~~~~~"+ new Date());
     }

     @Test
     public void testGet() throws Exception{

         /**
          * 映射sql的标识字符串，
          * me.gacl.mapping.userMapper是userMapper.xml文件中mapper标签的namespace属性的值，
          * getUser是select标签的id属性值，通过select标签的id属性值就可以找到要执行的SQL
          */
         String statement = "com.pt.map.UserMap.getUser";//映射sql的标识字符串
         //执行查询返回一个唯一user对象的sql
         int id = 1630002;
         User user = session.selectOne(statement, id);
         System.out.println(user.getUserId());
     }

     @Test
     public void testAdd() throws Exception{
         String statement = "com.pt.map.UserMap.addUser";//映射sql的标识字符串
         //执行查询返回一个唯一user对象的sql
         User newUser = new User();
         int id = 1005000;
         int insert_result = -88;
         while(id++ != 1009000){
             try{
                 newUser.setUserId(id);
                 insert_result = session.insert(statement, newUser);
                 session.commit();
                 System.out.println(id + "===INSERT SUCCESS===" + insert_result);
             }catch(Exception e){
                 System.out.println(id + "===INSERT FAIL===" + insert_result);
                 e.printStackTrace();
             }
             Thread.sleep(0, 10);
         }
     }

 }

test