【Mybatis】接口类注释增删改查

员工实体类：

 创建接口类，WorkerMapper.java

 1 package com.xiaobiti.dao;
 2 
 3 import com.xiaobiti.pojo.Worker;
 4 import org.apache.ibatis.annotations.*;
 5 
 6 public interface WorkerMapper {
 7     //查询
 8     @Select("select * from tb_worker where id = #{id}")
 9     Worker findById(int id);
10     //插入
11     @Insert("insert into tb_worker(name,age,sex,worker_id) values (#{name},#{age},#{sex},#{worker_id})")
12     void addWorker(Worker w);
13     //更新
14     @Update("update tb_worker set name=#{name},age=#{age},sex=#{sex},worker_id=#{worker_id} where id = #{id}")
15     void updateWorker(Worker w);
16     //删除
17     @Delete("delete from tb_worker where id=#{id}")
18     void deleteWorker(int id);
19     //传入参数的查询方式
20     @Select("select * from tb_worker where id=#{workId} and name=#{workName}")
21     Worker findByIdAndName(@Param("workId") int id,@Param("workName")String name);
22 }

需要在mybatis-config.xml配置文件中添加：

 测试类运行代码：

 1 //查询
 2     @Test
 3     public void findById(){
 4         SqlSession session = MybatisUtils.getSession();
 5         WorkerMapper mapper = session.getMapper(WorkerMapper.class);
 6         Worker worker = mapper.findById(2);
 7         System.out.println(worker);
 8     }
 9 
10     //插入
11     @Test
12     public void addWorker(){
13         SqlSession session = MybatisUtils.getSession();
14         WorkerMapper mapper = session.getMapper(WorkerMapper.class);
15         Worker worker = new Worker();
16         worker.setAge(20);
17         worker.setName("jojo");
18         worker.setSex("男");
19         worker.setWorker_id(1008);
20         mapper.addWorker(worker);
21         session.commit();
22         System.out.println(worker);
23     }
24 
25     //更新
26     @Test
27     public void updateWorker(){
28         SqlSession session = MybatisUtils.getSession();
29         WorkerMapper mapper = session.getMapper(WorkerMapper.class);
30         Worker worker = new Worker();
31         worker.setId(2);
32         worker.setAge(20);
33         worker.setName("jojo");
34         worker.setSex("男");
35         worker.setWorker_id(1008);
36         mapper.updateWorker(worker);
37         session.commit();
38         System.out.println(worker);
39     }
40 
41     //删除
42     @Test
43     public void deleteWorker(){
44         SqlSession session = MybatisUtils.getSession();
45         WorkerMapper mapper = session.getMapper(WorkerMapper.class);
46         mapper.deleteWorker(5);
47         session.commit();
48     }
49 
50     //传入参数的查询
51     @Test
52     public void findByIdAndName(){
53         SqlSession session = MybatisUtils.getSession();
54         WorkerMapper mapper = session.getMapper(WorkerMapper.class);
55         Worker worker = mapper.findByIdAndName(3,"李四");
56         System.out.println(worker);
57     }