[BE] feat: 커스텀 예외 도입 및 GlobalExceptionHandler 처리 예외 수정 (#93)

backend/src/main/java/com/woowacourse/friendogly/GlobalExceptionHandler.java

@@ -1,21 +1,28 @@
 package com.woowacourse.friendogly;
 
+import com.woowacourse.friendogly.exception.FriendoglyException;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.http.converter.HttpMessageNotReadableException;
 import org.springframework.web.HttpRequestMethodNotSupportedException;
+import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
 import org.springframework.web.servlet.resource.NoResourceFoundException;
 
 @RestControllerAdvice
 public class GlobalExceptionHandler {
 
-    @ExceptionHandler(IllegalArgumentException.class)
-    public ResponseEntity<String> handle(RuntimeException exception) {
+    @ExceptionHandler(FriendoglyException.class)
+    public ResponseEntity<String> handle(FriendoglyException exception) {
         return new ResponseEntity<>(exception.getMessage(), HttpStatus.BAD_REQUEST);
     }
 
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<String> handle(MethodArgumentNotValidException exception) {
+        return new ResponseEntity<>("유효하지 않은 요청 값입니다.", HttpStatus.BAD_REQUEST);
+    }
+
     @ExceptionHandler(HttpMessageNotReadableException.class)
     public ResponseEntity<String> handle(HttpMessageNotReadableException exception) {
         return new ResponseEntity<>("읽을 수 없는 HTTP 메세지입니다.", HttpStatus.BAD_REQUEST);

backend/src/main/java/com/woowacourse/friendogly/exception/FriendoglyException.java

@@ -0,0 +1,8 @@
+package com.woowacourse.friendogly.exception;
+
+public class FriendoglyException extends RuntimeException {
+
+    public FriendoglyException(String message) {
+        super(message);
+    }
+}