Mybatis学习[0]

初始的mybatis项目结构

——————————代码部分————————–
MybatisFirst.java

package com.zxy.mybatis.first;

import java.io.IOException;
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.Test;

import com.zxy.mybatis.po.User;

public class MybatisFirst {
    @Test
    public void findByIdTest() throws IOException{

        //mybatis配置文件
        String resource="SqlMapConfig.xml";
        InputStream inputStream=Resources.getResourceAsStream(resource);
        //1.创建会化工厂,传入
        SqlSessionFactory sessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
        //通过工厂创建sqlSession
        SqlSession sqlSession=sessionFactory.openSession();
        //通过sqlSession操作数据库
        User user=sqlSession.selectOne("test.findUserById", 1);
        System.out.println(user);

        //释放资源
        sqlSession.close();
    }

    //根据用户名模糊查询用户
    @Test
    public void findByNameTest() throws IOException{
        //mybatis配置文件
            String resource="SqlMapConfig.xml";
            InputStream inputStream=Resources.getResourceAsStream(resource);
            //1.创建会化工厂,传入
            SqlSessionFactory sessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
            //通过工厂创建sqlSession
            SqlSession sqlSession=sessionFactory.openSession();
            //通过sqlSession操作数据库
            List<User> list=sqlSession.selectList("test.findUserByName", "小明");
            for(User e:list){
                System.out.println(e);
            }

            //释放资源
            sqlSession.close();
    }
    //插入用户
    @Test
    public void insertUserTest() throws IOException{
        //mybatis配置文件
        String resource="SqlMapConfig.xml";
        InputStream inputStream=Resources.getResourceAsStream(resource);
        //1.创建会化工厂,传入
        SqlSessionFactory sessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
        //通过工厂创建sqlSession
        SqlSession sqlSession=sessionFactory.openSession();
        User user=new User();
        user.setUsername("张晓军");
        user.setSex("男");
        user.setBirthday(new Date());
        user.setAddress("北京交通大学");
        sqlSession.insert("test.insertUser", user);
        sqlSession.commit();
        // 获取用户信息主键
        System.out.println(user.getId());
        sqlSession.close();
    }

    //删除用户
        @Test
        public void delelteUserTest() throws IOException{
            //mybatis配置文件
            String resource="SqlMapConfig.xml";
            InputStream inputStream=Resources.getResourceAsStream(resource);
            //1.创建会化工厂,传入
            SqlSessionFactory sessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
            //通过工厂创建sqlSession
            SqlSession sqlSession=sessionFactory.openSession();
            sqlSession.insert("test.deleteUser", 27);
            sqlSession.commit();
            sqlSession.close();
        }
        //更新用户
        @Test
        public void updateUserTest() throws IOException{
            //mybatis配置文件
            String resource="SqlMapConfig.xml";
            InputStream inputStream=Resources.getResourceAsStream(resource);
            //1.创建会化工厂,传入
            SqlSessionFactory sessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
            //通过工厂创建sqlSession
            SqlSession sqlSession=sessionFactory.openSession();
            User user=new User();
            user.setId(28);
            user.setUsername("张开先");
            user.setSex("男");
            user.setBirthday(new Date());
            user.setAddress("北京大学");
            sqlSession.insert("test.updateUser", user);
            sqlSession.commit();
            sqlSession.close();
        }
}

-------------------------------------------------------
User.java
package com.zxy.mybatis.po;

import java.util.Date;

public class User {
    private int id;
    private String username;// 用户姓名
    private String sex;// 性别
    private Date birthday;// 生日
    private String address;// 地址
    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 String getSex() {
        return sex;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    public Date getBirthday() {
        return birthday;
    }
    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    @Override
    public String toString() {
        return "User [id=" + id + ", username=" + username + ", sex=" + sex + ", birthday=" + birthday + ", address="
                + address + "]";
    }

}

User.xml

<?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="test">

<!-- 根据id获取用户信息 -->
    <select id="findUserById" parameterType="int" resultType="com.zxy.mybatis.po.User">
        select * from user where id=#{id}
    </select>
<!-- 根据用户名模糊查询用户信息 -->
    <select id="findUserByName" parameterType="java.lang.String" resultType="com.zxy.mybatis.po.User">
        SELECT * FROM USER WHERE username LIKE '%${value}%'
    </select>   
<!-- 插入用户 -->
     <insert id="insertUser" parameterType="com.zxy.mybatis.po.User">
        <selectKey keyProperty="id" order="AFTER" resultType="java.lang.Integer">
            SELECT LAST_INSERT_ID()
        </selectKey>
        insert into user(username,sex,birthday,address) values(#{username},#{sex},#{birthday},#{address})
     </insert>
<!-- 删除用户 -->
    <delete id="deleteUser" parameterType="java.lang.Integer">
        delete from user where id=#{id}
    </delete>
<!-- 更新用户 -->
    <update id="updateUser" parameterType="com.zxy.mybatis.po.User">
        update user set username=#{username},sex=#{sex},birthday=#{birthday},address=#{address} where id=#{id}
    </update>
</mapper>

log4j.properties

# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# 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

SqlMapConfig.xml

<?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>
    <!-- 和spring整合后 environments配置将废除-->
    <environments default="development">
        <environment id="development">
        <!-- 使用jdbc事务管理-->
            <transactionManager type="JDBC" />
        <!-- 数据库连接池-->
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver" />
                <property name="url" value="jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf-8" />
                <property name="username" value="root" />
                <property name="password" value="123" />
            </dataSource>
        </environment>
    </environments>
    <!-- 加载配置文件 -->
    <mappers>
        <mapper resource="sqlmap/User.xml"/>
    </mappers>
</configuration>