#4 feat: binding result에 따른 검증 로직 컨트롤러에 추가

src/main/java/com/example/board/controller/PostController.java

@@ -1,23 +1,55 @@
 package com.example.board.controller;
 
 import com.example.board.dto.PostDto;
+import com.example.board.exception.BaseException;
+import com.example.board.exception.BindingException;
+import com.example.board.exception.ErrorMessage;
 import com.example.board.response.Response;
 import com.example.board.service.PostService;
 import lombok.RequiredArgsConstructor;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.BindingResult;
+import org.springframework.validation.FieldError;
+import org.springframework.validation.ObjectError;
+import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.util.List;
+
 @RequiredArgsConstructor
 @RequestMapping("/api/v1/posts")
 @RestController
 public class PostController {
     private final PostService postService;
 
     @PostMapping
-    public Response<Long> save(@RequestBody PostDto postDto) {
+    public Response<Long> save(@RequestBody @Validated PostDto postDto, BindingResult bindingResult) {
+        bindChecking(bindingResult);
         return Response.success(postService.save(postDto));
     }
 
+    private static void bindChecking(BindingResult bindingResult) {
+        if (bindingResult.hasErrors()) {
+            StringBuilder sb = new StringBuilder();
+            bindingResult.getAllErrors().forEach(objectError -> {
+
+                FieldError field = (FieldError) objectError;
+                String message = objectError.getDefaultMessage();
+
+                System.out.println("field :" + field.getField());
+                System.out.println("message :" + message);
+
+                sb.append("field :" + field.getField());
+                sb.append("message :" + message);
+
+            });
+
+            throw new BindingException(sb.toString());
+        }
+    }
+
 }