update : 2주차 과제

build.gradle

@@ -24,10 +24,10 @@ repositories {
 }
 
 dependencies {
-    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+//    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
     implementation 'org.springframework.boot:spring-boot-starter-web'
     compileOnly 'org.projectlombok:lombok'
-    runtimeOnly 'com.mysql:mysql-connector-j'
+//    runtimeOnly 'com.mysql:mysql-connector-j'
     annotationProcessor 'org.projectlombok:lombok'
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
     testRuntimeOnly 'org.junit.platform:junit-platform-launcher'

src/main/java/com/example/week2/builder/App1.java

@@ -1,8 +1,22 @@
 package com.example.week2.builder;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 public class App1 {
 
+  private static final Logger log = LoggerFactory.getLogger(App1.class);
+
   public static void main(String[] args) {
 
+    log.error("에러입니다.");
+    Student student = Student.builder()
+            .name("최수빈")
+            .age(25)
+            .school("세종대학교")
+            .build();
+
+    System.out.println(student);
+
   }
 }

src/main/java/com/example/week2/builder/Student.java

@@ -6,13 +6,15 @@
 import lombok.NoArgsConstructor;
 import lombok.Setter;
 import lombok.ToString;
+import lombok.extern.slf4j.Slf4j;
 
 @Getter
 @Setter
 @AllArgsConstructor
 @NoArgsConstructor
 @Builder
 @ToString
+@Slf4j
 public class Student {
   private String name;
   private int age;

src/main/java/com/example/week2/exception/ErrorCode.java

@@ -8,8 +8,9 @@
 @AllArgsConstructor
 public enum ErrorCode {
 
-  INVALID_REQUEST(HttpStatus.BAD_REQUEST, "잘못된 요청이 들어왔습니다"),;
-
+  INVALID_REQUEST(HttpStatus.BAD_REQUEST, "잘못된 요청이 들어왔습니다"),
+  SEJONG_UNIT(HttpStatus.OK,"세종대 학생 등록이 되었습니다"),
+  CUSTOM_ERROR(HttpStatus.BAD_REQUEST, "커스텀 에러가 발생했습니다.");
 
   private final HttpStatus status;
   private final String message;

src/main/java/com/example/week2/exception/ExceptionController.java

@@ -21,4 +21,9 @@ public void throwIllegalArgumentException() {
     throw new IllegalArgumentException();
   }
 
+  @GetMapping("/custom")
+  public void method1(){
+    throw new CustomException(ErrorCode.CUSTOM_ERROR);
+  }
+
 }

src/main/java/com/example/week2/exception/GlobalExceptionHandler.java

@@ -1,15 +1,17 @@
 package com.example.week2.exception;
 
 import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
 
 @RestControllerAdvice
 @Slf4j
 public class GlobalExceptionHandler {
 
-  @ExceptionHandler(NullPointerException.class)
+  @ExceptionHandler(NullPointerException.class) // null포인터익셉션을 잡아냄
   public String handleNullPointerException() {
+    // 잡아낸 후 다음 코드 실행
     log.error("NullPointer Exception 처리 시작");
     return "NullPointer Exception 핸들링";
   }
@@ -19,4 +21,18 @@ public String handleInternalError() {
     log.error("InternalError 처리 시작");
     return "InternalError 핸들링";
   }
+
+  @ExceptionHandler(CustomException.class)
+  public ResponseEntity<ErrorResponse> handleCustomException(CustomException e){
+    log.error("CustomException 발생: {}", e.getMessage(), e);
+
+    ErrorCode errorCode = e.getErrorCode();
+
+    ErrorResponse response = ErrorResponse.builder()
+            .errorCode(errorCode)
+            .errorMessage(errorCode.getMessage())
+            .build();
+
+    return ResponseEntity.status(errorCode.getStatus()).body(response);
+  }
 }

src/main/java/com/example/week2/swagger/config/SwaggerConfig.java

@@ -5,7 +5,7 @@
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
-@Configuration
+@Configuration // 환경설정
 public class SwaggerConfig {
 
   @Bean