Spring框架基於註解開發CRUD詳解
Spring框架基於註解開發CRUD,供大傢參考,具體內容如下
1. Maven坐標
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.2.0.RELEASE</version> </dependency> <!-- SpringJDBC jar包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.2.0.RELEASE</version> </dependency> <!-- spring整合junit jar包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>5.2.0.RELEASE</version> <scope>test</scope> </dependency> <!-- Lombok jar包 --> <dependency> <scope>compile</scope> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.16</version> </dependency> <!--單元測試jar包--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <!-- mysql數據庫jar包 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> <scope>runtime</scope> </dependency>
2. 實體類
@Data @Component //等價於 <bean id="user" class="org.westos.pojo.User"/> public class User { private Integer id; private String username; private Date birthday; private String sex; private String address; }
3. Spring配置類
用於代替原來的SpringIOC
@Configuration @ComponentScan(value = "org.westos") @PropertySource("classpath:jdbcConfig.properties") public class MyConfig { @Value("${jdbc.driver}") private String driver; @Value("${jdbc.url}") private String url; @Value("${jdbc.username}") private String username; @Value("${jdbc.password}") private String password; //註入數據源 @Bean("dataSource") public DataSource createDataSource() { DruidDataSource ds = new DruidDataSource(); ds.setDriverClassName(driver); ds.setUrl(url); ds.setUsername(username); ds.setPassword(password); return ds; } @Bean("jdbcTemplate") //註入JDBCtemplate模板 public JdbcTemplate createJdbcTemplate(DataSource dataSource){ return new JdbcTemplate(dataSource); } }
4. 業務層代碼
接口
public interface UserService { //查詢所有用戶 List<User> findAll(); //根據id查詢用戶 User findUserById(Integer uid); //保存用戶 void save(User user); //更新用戶 void update(User user); //刪除用戶 void delete(Integer uid); }
實現類
@Service("userService") public class UserServiceImpl implements UserService { @Autowired private UserDao userDao; //查詢所有用戶 public List<User> findAll() { List<User> list = userDao.findAll(); return list; } //根據id查詢用戶 public User findUserById(Integer uid) { User user = userDao.findUserById(uid); return user; } //保存用戶 public void save(User user) { userDao.save(user); } //更新用戶 public void update(User user) { userDao.update(user); } //刪除用戶 public void delete(Integer uid) { userDao.delete(uid); } }
5. 持久層代碼
接口
public interface UserDao { //查詢所有 List<User> findAll(); //根據id查詢 User findUserById(Integer uid); //保存 void save(User user); //更新 void update(User user); //刪除 void delete(Integer uid); }
實現類
@Repository("userDao") public class UserDaoImpl implements UserDao { @Autowired private JdbcTemplate jdbcTemplate; //查詢所有 public List<User> findAll() { return jdbcTemplate.query("select * from user", new BeanPropertyRowMapper<User>(User.class)); } //根據id查詢 public User findUserById(Integer uid) { return jdbcTemplate.queryForObject("select * from user where id=?", new BeanPropertyRowMapper<User>(User.class), uid); } //保存 public void save(User user) { jdbcTemplate.update("insert into user(username,birthday,sex,address) values (?,?,?,?)", user.getUsername(), user.getBirthday(), user.getSex(), user.getAddress()); } //更新 public void update(User user) { jdbcTemplate.update("update user set username=?,birthday=?,sex=?,address=? where id = ?", user.getUsername(), user.getBirthday(), user.getSex(), user.getAddress(), user.getId()); } //刪除 public void delete(Integer uid) { jdbcTemplate.update("delete from user where id=?", uid); } }
6. jdbc配置文件
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/mybatis_test jdbc.username=root jdbc.password=123
7. 測試類代碼
@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(classes = MyConfig.class) public class MyTest { @Autowired private UserService userService; @Autowired private User user; @Test public void findAllTest(){ List<User> list = userService.findAll(); for (User user : list) { System.out.println(user); } } @Test public void findUserByIdTest(){ User user = userService.findUserById(74); System.out.println(user); } @Test public void saveUserTest(){ user.setUsername("張三"); user.setBirthday(new Date()); user.setSex("女"); user.setAddress("西安市長安區"); userService.save(user); } @Test public void updateUserTest(){ user.setId(75); user.setUsername("李四"); user.setBirthday(new Date()); user.setSex("女"); user.setAddress("西安市雁塔"); userService.update(user); } @Test public void deleteUserTest(){ user.setId(75); userService.delete(user.getId()); } }
8. 工程目錄
以上就是本文的全部內容,希望對大傢的學習有所幫助,也希望大傢多多支持WalkonNet。
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