1、添加pom依赖
<!-- mysql --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.46</version> </dependency> <!-- mybatis --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.2</version> </dependency> <!-- springboot实现热部署 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> </dependency> <!-- 单元测试 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency>
2、注解方式配置
application.properties
mybatis.type-aliases-package=cn.xupengzhuang.entity spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.datasource.url=jdbc:mysql://localhost:3306/zhuang-blogger?useUnicode=true&characterEncoding=utf-8 spring.datasource.username=root spring.datasource.password=root
springboot会自动加载spring.datasource.*相关配置,数据源就会自动注入到sqlSessionFactory中,sqlSessionFactory会自动注入到Mapper中
启动类中添加对mapper包扫描
@SpringBootApplication @MapperScan("cn.xupengzhuang.mapper") public class ZhuangBloggerApplication { public static void main(String[] args) { SpringApplication.run(ZhuangBloggerApplication.class, args); } }
3、实体类
public class UserEntity { private static final long serialVersionUID = 1L; private Long id; private String userName; private String passWord; private UserSexEnum userSex; private String nickName; public UserEntity() { super(); } public UserEntity(String userName, String passWord, UserSexEnum userSex) { super(); this.passWord = passWord; this.userName = userName; this.userSex = userSex; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getPassWord() { return passWord; } public void setPassWord(String passWord) { this.passWord = passWord; } public UserSexEnum getUserSex() { return userSex; } public void setUserSex(UserSexEnum userSex) { this.userSex = userSex; } public String getNickName() { return nickName; } public void setNickName(String nickName) { this.nickName = nickName; } @Override public String toString() { // TODO Auto-generated method stub return "userName " + this.userName + ", pasword " + this.passWord + "sex " + userSex.name(); } }
4、枚举类
public enum UserSexEnum { MAN, WOMAN }
5、开发Mapper
public interface UserMapper { @Select("SELECT * FROM users") @Results({ @Result(property = "userSex", column = "user_sex", javaType = UserSexEnum.class), @Result(property = "nickName", column = "nick_name") }) List<UserEntity> getAll(); @Select("SELECT * FROM users WHERE id = #{id}") @Results({ @Result(property = "userSex", column = "user_sex", javaType = UserSexEnum.class), @Result(property = "nickName", column = "nick_name") }) UserEntity getOne(Long id); @Insert("INSERT INTO users(userName,passWord,user_sex) VALUES(#{userName}, #{passWord}, #{userSex})") void insert(UserEntity user); @Update("UPDATE users SET userName=#{userName},nick_name=#{nickName} WHERE id =#{id}") void update(UserEntity user); @Delete("DELETE FROM users WHERE id =#{id}") void delete(Long id); }
6、使用
@RestController @RequestMapping("/user") public class UserController { @Autowired private UserMapper userMapper; @GetMapping("/getUsers") public List<UserEntity> getUsers() { List<UserEntity> users=userMapper.getAll(); return users; } @GetMapping("/getUser/{id}") public UserEntity getUser(@PathVariable("id") Long id) { UserEntity user=userMapper.getOne(id); return user; } @PostMapping("/add") public void save(UserEntity user) { userMapper.insert(user); } @PutMapping("/update") public void update(UserEntity user) { userMapper.update(user); } @DeleteMapping("/delete/{id}") public void delete(@PathVariable("id") Long id) { userMapper.delete(id); } }
7、测试
@RunWith(SpringRunner.class) @SpringBootTest public class UserMapperTest { @Autowired private UserMapper userMapper; @Test public void testInsert() throws Exception { userMapper.insert(new UserEntity("aa", "a123456", UserSexEnum.MAN)); userMapper.insert(new UserEntity("bb", "b123456", UserSexEnum.WOMAN)); userMapper.insert(new UserEntity("cc", "b123456", UserSexEnum.WOMAN)); Assert.assertEquals(3, userMapper.getAll().size()); } @Test public void testQuery() throws Exception { List<UserEntity> users = userMapper.getAll(); System.out.println(users.toString()); } @Test public void testUpdate() throws Exception { UserEntity user = userMapper.getOne(30l); System.out.println(user.toString()); user.setNickName("neo"); userMapper.update(user); Assert.assertTrue(("neo".equals(userMapper.getOne(30l).getNickName()))); } }