SpringBoot与Postman实现REST模拟请求的操作

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

server:
  port: 8080
  servlet:
    context-path: /girl
spring:
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/test
    driver-class-name: com.mysql.jdbc.Driver
    username: root
    password: 1234
  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true

@RestController
public class MyController {
    @Autowired
    UserDao userDao;
    @RequestMapping(value = "/say/{name}")
    public @ResponseBody User say(@PathVariable("name") String uname){
        User user = new User();
        user.setUname(uname);
        return  userDao.save(user);
    }
    @GetMapping("/a")
    public List<User> geyUserList(){
        return userDao.findAll();
    }
    @PostMapping("/a")
    public User addUser(@RequestParam("uname") String uname){
       User user = new User();
       user.setUname(uname);
       return userDao.save(user);
    }
    @PutMapping(value = "/a/{no}")
    public User updateUser(@PathVariable("no") Integer uno,@RequestParam("uname") String uname){
       User user = new User();
       user.setUno(uno);
       user.setUname(uname);
       return userDao.save(user);
    }
    @DeleteMapping(value = "/a/{no}")
    public void deleteUser(@PathVariable("no") Integer uno){
        userDao.deleteById(uno);
    }
}