<!-- mybatis包 --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.2.0</version></dependency><!-- mysql --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.22</version></dependency>

# 开发环境中日志的级别使用DEBUG，生产环境中日志级别为ERROR
log4j.rootLogger=DEBUG, stdout
log4j.logger.org.mybatis.example.BlogMapper=TRACE
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

<?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 alias="User" type="com.yihaomen.mybatis.model.User"/> </typeAliases> <!-- spring整合之后，environments配置将废除  --><environments default="development"><environment id="development"><!-- 使用jdbc事务管理，事务控制有mybatis --><transactionManager type="JDBC"/><!-- 数据库连接池 ，有mybatis管理--><dataSource type="POOLED"><property name="driver" value="com.mysql.jdbc.Driver"/><property name="url" value="jdbc:mysql://192.168.6.1:3306/test"/><property name="username" value="dev"/><property name="password" value="123qwe"/></dataSource></environment></environments><!-- 加载映射文件 --><mappers><mapper resource="com/yihaomen/mybatis/model/User.xml"/></mappers>
</configuration>

package com.yihaomen.mybatis.model;public class User {private int id;private String userName;private int userAge;private String userAddress;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}public int getUserAge() {return userAge;}public void setUserAge(int userAge) {this.userAge = userAge;}public String getUserAddress() {return userAddress;}public void setUserAddress(String userAddress) {this.userAddress = userAddress;}}

<?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命名空间，作用就是对sql进行分类化管理，注意：使用mapper代理方法开发，namespace有特殊重要作用 -->
<mapper namespace="com.yihaomen.mybatis.dao.IUserOperation"><!-- 在映射文件中配置很多sql --><!-- id标识映射文件的sql，称为statement的id ，将sql语句封装到mappedStatement对象中，所以将id称为statement的idparameterType:指定输入类型  resultType：指定sql输出结果的所映射的java对象，select指定resultType表示将单挑记录映射成java对象--><select id="selectUserByID" parameterType="int" resultType="User">select * from `user` where id = #{id}</select><insert id="addUser" parameterType="User" useGeneratedKeys="true" keyProperty="id"> insert into user(userName,userAge,userAddress) values(#{userName},#{userAge},#{userAddress})  </insert>  <update id="updateUser" parameterType="User">update user set userName=#{userName},userAge=#{userAge},userAddress=#{userAddress} where id=#{id}</update><delete id="deleteUser" parameterType="int">delete from user where id=#{id}</delete><select id="list"  resultType="User">select * from `user`</select><!-- ${}表示拼接sql串，指定就是单挑记录所映射的java对象类型,使用${}拼接，容易导致sql注入${value}:拼接输入参数的内容，如果传入类型是简单类型，${}中只能使用value --><select id="findUserByName"  parameterType="String"  resultType="User">select * from `user` where username like '%${value}%'        </select>
</mapper>

package com.yihaomen.mybatis.dao;import java.util.List;import com.yihaomen.mybatis.model.Article;
import com.yihaomen.mybatis.model.User;//注意：接口名字必须与  xml中的namespace名字一样   2、接口实现方法每个名字  与xml中的id对应
public interface IUserOperation {   //查询数据public User selectUserByID(int id);    //增加数据public void addUser(User user);   //更新数据public void updateUser(User user);    //删除数据public void deleteUser(int id);//联合查询public List<Article> getUserArticles(int id);    //list获取public List<User> list();    //模糊查询public List<User> findUserByName(String name);}

package com.yihaomen.mybatis.ui;import java.io.Reader;
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 com.yihaomen.mybatis.dao.IUserOperation;
import com.yihaomen.mybatis.model.User;public class Test {private static SqlSessionFactory sqlSessionFactory;private static Reader reader; //创建会话工厂，传入mybatis的配置文件信息static{try{//得到配置文件流reader = Resources.getResourceAsReader("Configuration.xml");//创建会话工厂，传入mybatis的配置文件信息sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);}catch(Exception e){e.printStackTrace();}}//公共方法，返回初始化的sqlSessionFactory对象public static SqlSessionFactory getSession(){return sqlSessionFactory;}//查询数据public void select() {//通过工厂得到sqlsessionSqlSession session = sqlSessionFactory.openSession();try {//通过SqlSession操作数据库//第一个参数：映射文件中statement的id//第二个参数：指定和映射文件所匹配的parameterType类型参数User user = (User) session.selectOne("com.yihaomen.mybatis.model.User.selectUserByID", 1);System.out.println(user.getUserAddress());System.out.println(user.getUserName());} finally {session.close();}}//增加数据public void addUser(String address,String name){//创建user对象User user=new User();user.setUserAddress(address);user.setUserName(name);user.setUserAge(80);//通过工厂得到SqlSessionSqlSession session = sqlSessionFactory.openSession();try {IUserOperation userOperation=session.getMapper(IUserOperation.class);//添加数据userOperation.addUser(user);//提交session.commit();//System.out.println("当前增加的用户 id为:"+user.getId());} finally {session.close();}}//更新数据public void updateUser(int id,String address){//先得到用户,然后修改，提交。SqlSession session = sqlSessionFactory.openSession();try {IUserOperation userOperation = session.getMapper(IUserOperation.class);User user = userOperation.selectUserByID(id);            user.setUserAddress(address);userOperation.updateUser(user);session.commit();System.out.println("更新成功！！");} finally {session.close();}}//删除数据public void deleteUser(int id) {SqlSession session = sqlSessionFactory.openSession();try{IUserOperation userOperation = session.getMapper(IUserOperation.class);userOperation.deleteUser(id);session.commit();  System.out.println("删除数据：id= "+id);}finally {session.close();}}//list获取public void getList() {SqlSession session = sqlSessionFactory.openSession();try{IUserOperation userOperation = session.getMapper(IUserOperation.class);List<User> us = userOperation.list();          session.commit();  //System.out.println("生成list： "+us.size());}finally {session.close();}}//模糊查询public void geFindUserByName(String name) {SqlSession session = sqlSessionFactory.openSession();try{IUserOperation userOperation = session.getMapper(IUserOperation.class);List<User> us = userOperation.findUserByName(name);   System.out.println(us.size());session.commit();  }finally {session.close();}        }public static void main(String[] args) {Test test = new Test();test.getList();        test.geFindUserByName("小");//test.addUser("杭州","小江");}
}

[2017-01-10 20:22:33] DEBUG [main] - Logging initialized using 'class org.apache.ibatis.logging.slf4j.Slf4jImpl' adapter.
[2017-01-10 20:22:33] DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
[2017-01-10 20:22:33] DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
[2017-01-10 20:22:33] DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
[2017-01-10 20:22:33] DEBUG [main] - PooledDataSource forcefully closed/removed all connections.
[2017-01-10 20:22:33] DEBUG [main] - Opening JDBC Connection
[2017-01-10 20:22:34] DEBUG [main] - Created connection 238157928.
[2017-01-10 20:22:34] DEBUG [main] - Setting autocommit to false on JDBC Connection [com.mysql.jdbc.JDBC4Connection@e320068]
[2017-01-10 20:22:34] DEBUG [main] - ==>  Preparing: select * from `user` where username like '%小%'
[2017-01-10 20:22:34] DEBUG [main] - ==> Parameters:
[2017-01-10 20:22:34] DEBUG [main] - <==      Total: 7
7
[2017-01-10 20:22:34] DEBUG [main] - Resetting autocommit to true on JDBC Connection [com.mysql.jdbc.JDBC4Connection@e320068]
[2017-01-10 20:22:34] DEBUG [main] - Closing JDBC Connection [com.mysql.jdbc.JDBC4Connection@e320068]
[2017-01-10 20:22:34] DEBUG [main] - Returned connection 238157928 to pool.