SpringBoot 必知必会的19个常用注解

@SpringBootApplication
public class SpringbootLearningApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringbootLearningApplication.class, args);
    }
}

@RestController
public class IndexController {
    @Autowired
    private TestService testService;
}

@Service
public class TestService {
}

@Repository
public class TestDao {
}

@Controller
public class IndexController {

}

@RestController
public class IndexController {
}

@Configuration
public class TestConfiguration {
}

@Configuration
public class TestConfiguration {
    @Bean
    public TestHelper testHelper(){
        return new TestHelper();
    }
}

    @RequestMapping("/helloworld")
    public String helloWorld(){
        return "helloWorld";
    }

 @GetMapping("/helloworld")
    public String helloWorld(){
        return "helloWorld";
    }

 @PostMapping("/helloworld")
    public String helloWorld(){
        return "helloWorld";
    }

 @DeleteMapping("/helloworld")
    public String helloWorld(){
        return "helloWorld";
    }

 @PatchMapping("/helloworld")
    public String helloWorld(){
        return "helloWorld";
    }

 @PutMapping("/helloworld")
    public String helloWorld(){
        return "helloWorld";
    }

    @GetMapping("/helloworld/{name}/{age}")
    public String helloWorld(@PathVariable("name") String name,@PathVariable("age") String age){
        return name;
    }

   public String helloWorld(@RequestParam String name){
        return name;
    }

   public String helloWorld(@RequestBody User user){
        return user.getName();
    }

    @Value("${name}")
    private String name;

@Configuration
@ConfigurationProperties(prefix = "user")
public class UserConfig {
    private String userName;
    private String age;

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }
}

    @Autowired
    private UserConfig userConfig