spring-boot-demo | depth learning and actual combat | Object-Relational Mapping library

import org.springframework.stereotype.Component;
import org.springframework.validation.annotation.Validated;
import javax.validation.Valid;
@Component
@Validated
public class MyService {
    public void execute(@Valid MyRequest request) {
            //todo
    }
}

import lombok.Data;

import javax.validation.constraints.Positive;

@Data
public class MyRequest {
    @Positive(message = "id should be positive")
    private Long id;
}

@Controller
public class MainController {
    @Autowired
    private MyService service;
    @RequestMapping(value = "/execute", method = {GET, POST})
    @ResponseBody
    public MyResponse execute() {
        MyResponse res = new MyResponse();
        service.execute(new MyRequest());
        res.setHtmlText("hello world");
        return res;
    }
}

    4.0.0
    
        org.springframework.boot
        spring-boot-starter-parent
        2.5.4
         
    
    com.fudy
    spring-boot-demo
    0.0.1-SNAPSHOT
    spring-boot-demo
    Demo project for Spring Boot
    
        1.8
    
    
        
            org.springframework.boot
            spring-boot-starter
        
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
        
            org.projectlombok
            lombok
        
        
            org.springframework.boot
            spring-boot-starter-validation
        
        
            javax.validation
            validation-api
        
        
            org.hibernate.validator
            hibernate-validator
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

import lombok.Data;

import javax.validation.constraints.NotNull;
import javax.validation.constraints.Positive;

@Data
public class MyRequest {
    //@Positive(message = "id should be positive")
    @NotNull(message = "id should not be null")
    private Long id;
}