在Spring Boot中实现自定义异常

// CustomException.java
public class CustomException extends Exception {
    private int errorCode;

    public CustomException(String message, int errorCode) {
        super(message);
        this.errorCode = errorCode;
    }

    public int getErrorCode() {
        return errorCode;
    }
}

// GlobalExceptionHandler.java
@ControllerAdvice
public class GlobalExceptionHandler {
    @ExceptionHandler(CustomException.class)
    public ResponseEntity<String> handleCustomException(CustomException ex) {
        // 处理CustomException的逻辑
        String message = ex.getMessage();
        int errorCode = ex.getErrorCode();
        
        // 返回自定义的响应信息
        return ResponseEntity.status(errorCode).body(message);
    }
}

// SomeController.java
@RestController
public class SomeController {
    @GetMapping("/some-endpoint")
    public ResponseEntity<String> someEndpoint() throws CustomException {
        // 模拟抛出CustomException
        throw new CustomException("Custom exception message", 500);
    }
}