USE `mybatis`;/*Table structure for table `user` */DROP TABLE IF EXISTS `user`;CREATE TABLE `user` (  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '用户ID',  `name` varchar(45) NOT NULL DEFAULT '无名氏' COMMENT '用户名',  `age` tinyint(3) NOT NULL DEFAULT '21' COMMENT '用户年龄',  `birthday` datetime NOT NULL DEFAULT '1970-01-01 00:00:00' COMMENT '用户生日',  `address` varchar(256) NOT NULL DEFAULT '北京' COMMENT '用户地址',  PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=18 DEFAULT CHARSET=utf8 COMMENT='用户表';/*Data for the table `user` */insert  into `user`(`id`,`name`,`age`,`birthday`,`address`) values (1,'赵敏',23,'1990-01-23 20:24:21','明教'),(2,'李四',18,'1986-12-23 12:13:11','广州'),(3,'张五',33,'1975-09-23 02:13:11','上海'),(4,'王六',27,'1984-11-01 11:23:14','重庆'),(5,'张三丰',108,'1971-01-02 02:12:11','武当'),(6,'想起 来叫什么了',22,'1984-01-23 20:23:22','魔都上海'),(7,'呵呵',22,'1984-01-23 20:23:22','不知道是哪的'),(8,'张无忌',18,'2015-10-28 15:31:31','明教');

/***/package com.pb.mybatis.po;import java.util.Date;/**   * @Title: User.java * @Package com.pb.mybatis.po * @ClassName User * @Description: TODO(用户类) * @author 刘楠  * @date 2015-10-30 下午4:27:05 * @version V1.0   */public class User {        //用户ID    private int id;    //用户名    private String name;    //用户年龄    private int age;        //生日    private Date birthday;    //地址    private String address;    /**     * @return the id     */    public int getId() {        return id;    }    /**     * @param id the id to set     */    public void setId(int id) {        this.id = id;    }    /**     * @return the name     */    public String getName() {        return name;    }    /**     * @param name the name to set     */    public void setName(String name) {        this.name = name;    }    /**     * @return the age     */    public int getAge() {        return age;    }    /**     * @param age the age to set     */    public void setAge(int age) {        this.age = age;    }    /**     * @return the birthday     */    public Date getBirthday() {        return birthday;    }    /**     * @param birthday the birthday to set     */    public void setBirthday(Date birthday) {        this.birthday = birthday;    }    /**     * @return the address     */    public String getAddress() {        return address;    }    /**     * @param address the address to set     */    public void setAddress(String address) {        this.address = address;    }    /** (non Javadoc)         * <p>Title: toString</p>         * <p>Description: </p>         * @return         * @see java.lang.Object#toString()     */    @Override    public String toString() {        return "User [id=" + id + ", name=" + name + ", age=" + age                + ", birthday=" + birthday + ", address=" + address + "]";    }        }

#数据库基本配置信息#驱动jdbc.driver=com.mysql.jdbc.Driver#连接URLjdbc.url=jdbc:mysql://localhost:3306/mybatis?CharacterEncoding=utf8#用户名jdbc.username=root#密码jdbc.password=root

# Global logging configurationlog4j.rootLogger=DEBUG, stdout# MyBatis logging configuration...# Console output...log4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

/***/package com.pb.mybatis.mapper;import java.util.List;import org.apache.ibatis.annotations.Param;import com.pb.mybatis.po.User;/**   * @Title: UserMapper.java * @Package com.pb.mybatis.mapper * @ClassName UserMapper * @Description: TODO(用户类数据访问层Mapper接口) * @author 刘楠  * @date 2015-10-30 下午6:17:43 * @version V1.0   */public interface UserMapper {            public User findUserById(int id);        /**     *      * @Title: findUserByWhere         * @Description: TODO(根据条件查询用户)         * @return List<User>     */    public List<User> findUserByWhere(@Param("id") int id,@Param("name")String username);        /**     *      * @Title: updateUser         * @Description: TODO(修改)         * @param user     * @return int     */    public int updateUser(User user);}

<?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.pb.mybatis.mapper.UserMapper"><!-- 映射 --><resultMap type="User" id="userResultMap"><id property="id" column="id"/><result property="name" column="name"/><result property="age" column="age"/><result property="birthday" column="birthday"/><result property="address" column="address"/></resultMap><select id="findUserById" parameterType="int" resultMap="userResultMap">select * from user where id=#{id}</select><!-- 根据条件查询用户 --><select id="findUserByWhere" resultMap="userResultMap">select * from user<where><!--where会自动去掉第一个成功的条件的and和or  --><if test="id!=null and id!='' and id!=0">and id=#{id}</if><if test="name!=null and name!=''">or name like "%"#{name}"%"</if></where></select><!--修改  SET NAME=#{name},age=#{age},birthday=#{birthday},address=#{address}--><update id="updateUser" parameterType="User">UPDATE USER<!--使用SET来更新  --><set><if test="name !=null and name !=''">NAME=#{name},</if><if test="age !=null  and age !='' and age !=0">age=#{age},</if><if test="birthday !=null">birthday=#{birthday},</if><if test="address !=null and address !=''">address=#{address}</if></set>WHERE id=#{id}</update></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><properties resource="db.properties" /><typeAliases><!--使用默认别名  --><package name="com.pb.mybatis.po"/></typeAliases><environments default="development"><environment id="development">    <transactionManager type="JDBC"/>    <dataSource type="POOLED">        <property name="driver" value="${jdbc.driver}"/>        <property name="url" value="${jdbc.url}"/>        <property name="username" value="${jdbc.username}"/>        <property name="password" value="${jdbc.password}"/>    </dataSource></environment></environments><mappers><!-- 加载映射 --><package name="com.pb.mybatis.mapper"/></mappers></configuration>

/***/package com.pb.mybatis.mapper;import static org.junit.Assert.*;import java.io.InputStream;import java.util.Date;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.junit.Before;import org.junit.Test;import com.pb.mybatis.po.User;/**   * @Title: UserMapperTest.java * @Package com.pb.mybatis.mapper * @ClassName UserMapperTest * @Description: TODO(用一句话描述该文件做什么) * @author 刘楠  * @date 2015-10-30 下午6:25:23 * @version V1.0   */public class UserMapperTest {private SqlSessionFactory sqlSessionFactory;        /**     *      * @Title: setUp         * @Description: TODO(在每个方法前执行的方法)         * @throws Exception void     */    @Before    public void setUp() throws Exception {        String resource="configuration.xml";        InputStream in=Resources.getResourceAsStream(resource);        //获取会话工厂        sqlSessionFactory=new SqlSessionFactoryBuilder().build(in);    }        @Test    public void testFindUserById() {        //获取会话        SqlSession sqlSession=sqlSessionFactory.openSession();        UserMapper userMapper=sqlSession.getMapper(UserMapper.class);        User user=userMapper.findUserById(1);        System.out.println(user);    }        @Test    public void testFindUserByWhere() {        //获取会话        SqlSession sqlSession=sqlSessionFactory.openSession();        UserMapper userMapper=sqlSession.getMapper(UserMapper.class);        List<User> list=userMapper.findUserByWhere(0,"");        System.out.println(list);    }    @Test    public void testUpdateUser() {        //获取会话        SqlSession sqlSession=sqlSessionFactory.openSession();        UserMapper userMapper=sqlSession.getMapper(UserMapper.class);        User user=userMapper.findUserById(6);        System.out.println(user);        user.setBirthday(new Date());                user.setName("sssss");        user.setAddress("ddd");        int num=userMapper.updateUser(user);        sqlSession.commit();        System.out.println("num="+num);            }}