9.18/3

backend/src/main/java/com/example/demo/common/GlobalExceptionHandler.java

@@ -0,0 +1,43 @@
+package com.example.demo.common;
+
+import org.springframework.dao.DataAccessException;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    private ResponseEntity<Map<String,Object>> badRequest(String message) {
+        Map<String,Object> body = new HashMap<>();
+        body.put("message", message);
+        return ResponseEntity.badRequest().body(body);
+    }
+
+    @ExceptionHandler(IllegalArgumentException.class)
+    public ResponseEntity<?> handleIllegalArgument(IllegalArgumentException ex) {
+        return badRequest(ex.getMessage());
+    }
+
+    @ExceptionHandler(IllegalStateException.class)
+    public ResponseEntity<?> handleIllegalState(IllegalStateException ex) {
+        return badRequest(ex.getMessage());
+    }
+
+    @ExceptionHandler(DataAccessException.class)
+    public ResponseEntity<?> handleDataAccess(DataAccessException ex) {
+        return badRequest("数据库操作失败");
+    }
+
+    @ExceptionHandler(Exception.class)
+    public ResponseEntity<?> handleAny(Exception ex) {
+        Map<String,Object> body = new HashMap<>();
+        body.put("message", ex.getMessage() == null ? "Internal Server Error" : ex.getMessage());
+        return ResponseEntity.status(500).body(body);
+    }
+}
+
+