mybatis入门

<?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>
    <environments default="development">
     <environment id="development">
      <transactionManager type="JDBC"/>
      <dataSource type="POOLED">
        <!--表示Oracle数据库链接驱动-->
        <property name="driver" value="oracle.jdbc.driver.OracleDriver"/>
        <!--表示链接字符串-->
        <property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl"/>
        <property name="username" value="hotelsup"/>
        <property name="password" value="123"/>
      </dataSource>
    </environment>
  </environments> 
  <mappers>
    <!--sql的配置文件 暂时不管-->
  </mappers>

</configuration>

package com.jinglin.hotelsup.model;

import java.io.Serializable;

public class Userinfo implements Serializable{
       private Integer userid ;
       private String username ;
       private String userpwd ;
       private String card ;
       private String job ;
       private String del ;
    public Integer getUserid() {
        return userid;
    }
    public void setUserid(Integer userid) {
        this.userid = userid;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getUserpwd() {
        return userpwd;
    }
    public void setUserpwd(String userpwd) {
        this.userpwd = userpwd;
    }
    public String getCard() {
        return card;
    }
    public void setCard(String card) {
        this.card = card;
    }
    public String getJob() {
        return job;
    }
    public void setJob(String job) {
        this.job = job;
    }
    public String getDel() {
        return del;
    }
    public void setDel(String del) {
        this.del = del;
    }
}

<?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.jinglin.hotelsup.model">
    <!-- 编写SQL语句，select,delete,update,insert -->
    <insert id="insertitem" parameterType="com.jinglin.hotelsup.model.Userinfo">
        insert into userinfo(userid,username,userpwd,card,job)
        values(userseq.nextval,#{username},#{userpwd},#{card},#{job})
    </insert>
    
    <update id="updateitem" parameterType="com.jinglin.hotelsup.model.Userinfo">
        update userinfo set username=#{username},userpwd=#{userpwd},card=#{card},job=#{job} where userid=#{userid}
    </update>
    <!--物理删除-->
    <delete id="deleteitem" >
        delete userinfo where userid=#{id}
    </delete>
    <!--逻辑删除-->
    <delete id="updateuser" parameterType="com.jinglin.hotelsup.model.Userinfo">
        update userinfo set del=‘Y‘ where userid=#{id}
    </delete>
    
    <select id="selectone" resultType="com.jinglin.hotelsup.model.Userinfo">
        select * from userinfo where del=‘N‘ and userid=#{id}
    </select>
    
    <select id="selectall" resultMap="com.jinglin.hotelsup.model.userinfomap">
        select * from userinfo where del=‘N‘
    </select>
    <!-- 配置查询结果集   数据表字段和实体类的属性的映射关系-->
    <resultMap id="userinfomap" type="com.jinglin.hotelsup.model.Userinfo">
        <!-- id表示首先配置主键 ,property表示的是实体类的属性名，column表示的是数据库表的字段名-->
        <id  property="userid" column="userid"/>
        <result property="username" column="username"/>
        <result property="userpwd" column="userpwd"/>
        <result property="card" column="card"/>
        <result property="job" column="job"/>
        <result property="del" column="del"/>
    </resultMap>
    
</mapper>

<mappers>
  <!-- 引入映射的配置文件 -->
  <mapper resource="com/jinglin/bookstore/model/UserinfoMapper.xml" /> 
</mappers>

package com.jinglin.hotelsup.dao.imp;

import java.io.IOException;
import java.io.InputStream;

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.jinglin.hotelsup.dao.IDao;
import com.jinglin.hotelsup.model.Userinfo;

public class UserInfoDao implements IDao<Userinfo> {
    static SqlSessionFactory sqlsessionFactory =null;
    static{
        String resource = "mybatis-config.xml";
        try {
            //把配置信息读取到内存中
            InputStream inputStrem =Resources.getResourceAsStream(resource);
            //创建sqlsessionFactory这个对象
            sqlsessionFactory =new  SqlSessionFactoryBuilder().build(inputStrem);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    @Override
    public int additem(Useriinfo t) {
        //采用Mybatis的方法
        SqlSession sqlSession = sqlsessionFactory.openSession();
        //表示调用新增数据的方法
        int i =sqlSession.insert("com.jinglin.hotelsup.model.insertItem", t);
        //涉及到事务
        sqlSession.commit();//把操作的数据提交到数据库中
        //关掉操作
        sqlSession.close();
        return i;
    }
    @Test
    public void testit(){
        Userinfo u = new Userinfo();
        u.setCard("123");
        u.setJob("工程师");
        u.setUsername("admin123");
        u.setUserpwd("123456");
        int result = additem(u);
        System.out.println(result);
    }
}