8、mybatis之增删改查

文章目录

1、EmployeeMapper.xml
2、测试增删改查

1、EmployeeMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--指定为接口的全类名-->
<mapper namespace="com.mi.dao.EmployeeMapper"><!--id 为接口的方法名--><select id="getEmployeeById" resultType="com.mi.pojo.Employee">select * from employee where id = #{id}</select><insert id="addEmp" parameterType="com.mi.pojo.Employee">insert into employee (last_name,gender) values (#{lastName},#{gender})</insert><delete id="deleteEmp">delete from employee where id = #{id}</delete><update id="updateEmp" >update employee set last_name = #{lastName},gender = #{gender} where id = #{id}</update>
</mapper>

2、测试增删改查

package com.mi.test;import com.mi.dao.EmployeeMapper;
import com.mi.pojo.Employee;
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;public class TestMybatis {public SqlSessionFactory getSqlSessionFactory() throws IOException {String resource  = "mybatis-config.xml";InputStream inputStream = Resources.getResourceAsStream(resource);return new SqlSessionFactoryBuilder().build(inputStream);}@Testpublic void testGet() throws IOException {//1、获取SqlSessionFactory对象SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();//2、获取Sqlsesion对象SqlSession sqlSession = sqlSessionFactory.openSession();try {//3、获取接口的实现类对象//会为接口自动创建一个代理对象，代理对象去执行增删改查方法EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);Employee employee = mapper.getEmployeeById(3);System.out.println(employee);}finally {sqlSession.close();}}@Testpublic void testAdd() throws IOException {//1、获取SqlSessionFactory对象SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();//2、获取Sqlsesion对象SqlSession sqlSession = sqlSessionFactory.openSession();try {//3、获取接口的实现类对象//会为接口自动创建一个代理对象，代理对象去执行增删改查方法EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);Integer employee = mapper.addEmp(new Employee(null,"jerry","1"));sqlSession.commit();System.out.println(employee);}finally {sqlSession.close();}}@Testpublic void testDel() throws IOException {//1、获取SqlSessionFactory对象SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();//2、获取Sqlsesion对象SqlSession sqlSession = sqlSessionFactory.openSession();try {//3、获取接口的实现类对象//会为接口自动创建一个代理对象，代理对象去执行增删改查方法EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);Integer employee = mapper.deleteEmp(1);sqlSession.commit();System.out.println(employee);}finally {sqlSession.close();}}@Testpublic void testUpdate() throws IOException {//1、获取SqlSessionFactory对象SqlSessionFactory sqlSessionFactory = getSqlSessionFactory();//2、获取Sqlsesion对象SqlSession sqlSession = sqlSessionFactory.openSession();try {//3、获取接口的实现类对象//会为接口自动创建一个代理对象，代理对象去执行增删改查方法EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);Integer employee = mapper.updateEmp(new Employee(3,"jerry","0"));sqlSession.commit();System.out.println(employee);}finally {sqlSession.close();}}}

8、mybatis之增删改查相关推荐

mybatis实现增删改查xml配置和后端Java编程完整教程
mybatis实现增删改查xml配置和后端编程教程 SqlMapConfig.xml <?xml version="1.0" encoding="UTF-8&quo ...
mybatis完整增删改查入门实例
mybatis完整增删改查入门实例编程步骤 ①创建Java工程. ②导入jar包. ③创建sqlMapConfig.xml配置文件,这是mybatis的入口. ④创建数据库,数据库表user_c,插 ...
idea使用mybatis写增删改查
idea应用mybatis写增删改查 entity层 private Integer id;private String userCode;private String userName;privat ...
Spring+SpringMVC+Mybatis实现增删改查--（五）SSM修改员工页面搭建
Spring+SpringMVC+Mybatis实现增删改查--(五)SSM修改员工页面搭建修改员工: 1.在index.jsp页面点击"编辑"弹出编辑对话框 2.去数据库查询部 ...
MyBatis的增删改查操作
MyBatis的增删改查操作简单实现一下MyBatis的增删改查,并且在控制台输出结果. 文章目录 MyBatis的增删改查操作 MyBatis的简单入门一.查询操作二.增加操作三.修改操作 ...
MyBatis实现增删改查功能（总）
文章目录 MyBatis实现增删改查功能(总) 一.创建数据库.表.数据二.MyBatis的Maven项目创建三.MyBatis的Maven模块创建四.配置jar包pom.xml 五.MyBat ...
Mybatis实现增删改查
文章目录 Mybatis实现增删改查一.mybatis的配置 1.1 添加相应的jar包 1.2 配置mybatis.xml文件 1.3 创建数据库 1.4 创建实体类 1.5 创建接口实现的方法 ...
（Mybatis）增删改查实现
文章目录 namespace 增删改查 1. Select 2. Insert 3. Update 4. Delete 万能Map 模糊查询 namespace namespace一定要与mapper ...
3. mysql的注解驱动的三种方式_上手spring boot项目(三)之spring boot整合mybatis进行增删改查的三种方式。...
1.引入依赖 org.springframework.boot spring-boot-starter-web org.mybatis.spring.boot mybatis-spring-boot- ...

8、mybatis之增删改查

文章目录

1、EmployeeMapper.xml

2、测试增删改查

8、mybatis之增删改查相关推荐

最新文章

热门文章