/**测试第16章的增,删,改 的内容*  错误1: <insert id="addEmp" parameterType="com.bean.Employee">  ,注意选取数据类型是parameterType,不是Map*  错误2: 按顺序查找全部数据,但是delete清楚数据后, id自增变量不是从零开始的;所以自己的while循环不好!*  ---------*  1. mybatis 支持允许增删改查,直接定义如下类型: Integer/long/boolean类型*  2. 手动提交即可, openSession.commit();*  3.*/

<?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.dao.EmployeeMapper"><!--namespace: 名称空间id: 唯一标识resultType:返回值类型#{id} : 从传递过来的参数中取出id值public Employee getEmpById(Integer id);--><select id="getEmpById" resultType="com.bean.Employee" databaseId="mysql">select * from tbl_employee where id = #{id}</select><!--public void addEmp(Employee employee);parameterType : 参数类型,可以省略;mysql支持自增主键,自增主键的获取:mybatis也是利用statement.getGeneratedKeys()调用方法: 在标签中添加即可: useGeneratedKeys="true";--><insert id="addEmp" parameterType="com.bean.Employee"useGeneratedKeys="true" keyProperty="id">insert into tbl_employee(last_name,email,gender)values (#{lastName},#{email},#{gender})</insert><!--public void updateEmp(Employee employee);--><update id="updateEmp" >update tbl_employeeset last_name=#{lastName},email=#{email},gender=#{gender}where id=#{id}</update><!--public void deleteEmpById(Integer id);--><delete id="deleteEmpById">delete from tbl_employee where id=#{id}</delete>
</mapper>

package com.dao;
import com.bean.*;//接口式编程! namespace: 名称空间,指定为接口名字;
public interface EmployeeMapper {public Employee getEmpById(Integer id);//添加返回值类型,表示mybatis的会话状态是true或者falsepublic boolean addEmp(Employee employee);public boolean updateEmp(Employee employee);public boolean deleteEmpById(Integer id);
}

package com.test;
import com.bean.Employee;
import com.dao.EmployeeMapper;
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 java.io.IOException;
import java.io.InputStream;/**测试第16章的增,删,改 的内容*  错误1: <insert id="addEmp" parameterType="com.bean.Employee">  ,注意选取数据类型是parameterType,不是Map*  错误2: 按顺序查找全部数据,但是delete清楚数据后, id自增变量不是从零开始的;所以自己的while循环不好!*  ---------*  1. mybatis 支持允许增删改查,直接定义如下类型: Integer/long/boolean类型*  2. 手动提交即可, openSession.commit();*  3.*/
public class test_tp16 {public SqlSessionFactory getSqlSessionFactory() throws IOException {String resource = "mybatis-config.xml";InputStream inputStream=Resources.getResourceAsStream(resource);return new SqlSessionFactoryBuilder().build(inputStream);}@Testpublic void test03() throws IOException{//默认是不自动提交数据的,需要我们自己手动提交SqlSession openSession = getSqlSessionFactory().openSession();try {EmployeeMapper mapper = openSession.getMapper(EmployeeMapper.class);//1-1 测试:增加一条记录//  Employee employee1 = new Employee(null, "jerry", "jerry@163.com", "0");//     mapper.addEmp(employee1);//1-1-1 测试自增:增加一条记录Employee employee1 = new Employee(null, "葫芦娃", "葫芦娃@163.com", "0");mapper.addEmp(employee1);//1-2 测试; 更新一号的名字为 jerry,性别为1
//            Employee employee = new Employee(1, "jerry", "jerry@163.com", "1");
//            mapper.updateEmp(employee);//1-3 测试删除,删除第二号的员工//   boolean b= mapper.deleteEmpById(2);//   System.out.println(b);//1-4 测试; 按顺序查找全部数据,
            Employee employee;int i=1;while ((employee = mapper.getEmpById(i))!=null){i++;System.out.println(employee);}//2.手动提交
            openSession.commit();} finally {openSession.close();}}
}