mybatis learning: Notes development mybatis CRUD operations

Dao layer:

 1 public interface IUserDao {
 2 
 3     /**
 4      * 查询所有结果
 5      * @return
 6      */
 7     @Select("select * from user")
 8     List<User> findAll();
 9 
10     /**
11      * 保存用户
12      * @param user
13      */
14     @Insert("insert into user(username,address,sex,birthday) values(#{username},#{address},#{sex},#{birthday})")
15     void saveUser(User user);
16 
17     /**
18       * update user
 . 19       * @param User
 20 is       * / 
21 is      @Update ( "SET Update User username = # {} username, address address = # {}, {Sex Sex = #}, Birthday = {#} WHERE ID = Birthday {ID} # " )
 22 is      void the updateUser (the user user);
 23 is  
24      / ** 
25       * delete the user
 26 is       * @param ID
 27       * / 
28      @Delete (" delete from WHERE ID = user ID # {} " )
 29      void deleteUser (id Integer);
 30  
31 is      / ** 
32       * The query user id
 33       *@param the userId
 34 is       * @return 
35       * / 
36      @Select ( "SELECT * WHERE ID from User ID = # {}" )
 37 [      the User the findById (Integer the userId);
 38 is  
39      / ** 
40       * Fuzzy queries the user
 41       * @ param username
 42 is       * @return 
43 is       * / 
44 is  //     @Select ( "SELECT * WHERE username like from User # {} username")      // parameter placeholders 
45      @Select ( "SELECT * WHERE from User username like '% $ value}% { ' ")       // string concatenation 
46 is      List <the User>findUserByName (String username);
 47  
48      / ** 
49       * the total number of user queries
 50       * @return 
51 is       * / 
52 is      @Select ( "SELECT COUNT (*) from User" )
 53 is      int findTotalUser ();
 54 is  
55 }

 

test：

 1 public class AnnotationCRUDTest {
 2 
 3     private InputStream in;
 4     private SqlSessionFactory factory;
 5     private SqlSession session;
 6     private IUserDao userDao;
 7 
 8     @Before
 9     public void init() throws IOException {
10         in = Resources.getResourceAsStream("SqlMapConfig.xml");
11         factory = new SqlSessionFactoryBuilder().build(in);
12         session = factory.openSession();
13         userDao = session.getMapper(IUserDao.class);
14     }
15 
16     @After
17     public  void  destory() throws IOException {
18         session.commit();
19         session.close();
20         in.close();
21     }
22 
23     @Test
24     public  void testSave(){
25         User user = new User();
26         user.setUsername("flypig");
27         user.setAddress("中国");
28 
29         userDao.saveUser(user);
30     }
31 
32     @Test
33     public void testUpdate(){
34         User user = new User();
35         user.setId(49);
36         user.setUsername("flypighhh");
37         user.setAddress("China");
38         user.setSex("男");
39         user.setBirthday(new Date());
40 
41         userDao.updateUser(user);
42     }
43 
44     @Test
45     public void testDelete(){
46         userDao.deleteUser(49);
47     }
48 
49     @Test
50     public void testFindOne(){
51         User user = userDao.findById(48);
52         System.out.println(user);
53     }
54 
55     @Test
56     public void testFindUserByName(){
57         //List<User> users = userDao.findUserByName("%王%");
58         List<User> users = userDao.findUserByName("王");
59         for (User user : users) {
60             System.out.println(user);
61         }
62     }
63 
64     @Test
65     public void testFindTotal(){
66         int total = userDao.findTotalUser();
67         System.out.println(total);
68     }
69 
70 }