validation - spring-boot-aop : before, after, around

aop/src/main/java/com/example/aop/config/BindingAdvice.java

@@ -0,0 +1,69 @@
+package com.example.aop.config;
+
+import com.example.aop.domain.CommonDto;
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.annotation.After;
+import org.aspectj.lang.annotation.Around;
+import org.aspectj.lang.annotation.Aspect;
+import org.aspectj.lang.annotation.Before;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Component;
+import org.springframework.validation.BindingResult;
+import org.springframework.validation.FieldError;
+import org.springframework.web.context.request.RequestContextHolder;
+import org.springframework.web.context.request.ServletRequestAttributes;
+
+import javax.servlet.http.HttpServletRequest;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+
+// @Configuration -> @Controller , @Service, @Repository -> @Component
+@Component
+@Aspect
+public class BindingAdvice {
+
+    @Before("execution(* com.example.aop.web..*Controller.*(..))")
+    public void before() {
+        HttpServletRequest request =
+                ((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getRequest();
+        System.out.println("전처리 로그");
+    }
+    @After("execution(* com.example.aop.web..*Controller.*(..))")
+    public void after() {
+        System.out.println("후처리 로그");
+    }
+
+
+    @Around("execution(* com.example.aop.web..*Controller.*(..))")
+    public Object validCheck(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
+        String type = proceedingJoinPoint.getSignature().getDeclaringTypeName();
+        String method = proceedingJoinPoint.getSignature().getName();
+        System.out.println(type);
+        System.out.println(method);
+
+        Object[] args = proceedingJoinPoint.getArgs();
+        Map<String, String> errorMap = new HashMap<>();
+
+//        for (Object arg : args) {
+//            if (arg instanceof BindingResult) {
+//                BindingResult bindingResult = (BindingResult) arg;
+//                if (bindingResult.hasErrors()) {
+//                    for (FieldError error : bindingResult.getFieldErrors()) {
+//                        errorMap.put(error.getField(), error.getDefaultMessage());
+//                    }
+//                }
+//            }
+//        }
+
+        Arrays.stream(args)
+                .filter(v -> v instanceof BindingResult)
+                .filter(v -> ((BindingResult) v).hasErrors())
+                .forEach(v -> ((BindingResult) v).getFieldErrors()
+                        .forEach(error -> errorMap.put(error.getField(), error.getDefaultMessage())));
+
+        return errorMap.isEmpty() ? proceedingJoinPoint.proceed() : new CommonDto<>(errorMap, HttpStatus.BAD_REQUEST.value());
+    }
+}
+
+

aop/src/main/java/com/example/aop/web/UserController.java

@@ -40,13 +40,6 @@ public class UserController {
     @PostMapping("/user")
     public CommonDto<?> save(@RequestBody @Valid JoinReqDto dto, BindingResult bindingResult) {
         System.out.println("save()");
-        if (bindingResult.hasErrors()) {
-            Map<String, String> errorMap = new HashMap<>();
-            bindingResult.getFieldErrors().forEach(error -> {
-                errorMap.put(error.getField(), error.getDefaultMessage());
-            });
-            return new CommonDto<>(errorMap, HttpStatus.BAD_REQUEST.value());
-        }
         userRepository.save(dto);
         return new CommonDto<>("ok", HttpStatus.CREATED.value());
     }
@@ -63,14 +56,8 @@ public class UserController {
     @PutMapping("/user/{id}")
     public CommonDto<?> update(@PathVariable int id, @Valid @RequestBody UpdateReqDto dto, BindingResult bindingResult){
         System.out.println("update()");
-        if (bindingResult.hasErrors()) {
-            Map<String, String> errorMap = new HashMap<>();
-            bindingResult.getFieldErrors().forEach(error -> {
-                errorMap.put(error.getField(), error.getDefaultMessage());
-            });
-            return new CommonDto<>(errorMap, HttpStatus.BAD_REQUEST.value());
-        }
         userRepository.update(id, dto);
         return new CommonDto<>(HttpStatus.OK.value());
     }
+
 }