如何使用ResponseEntity从REST调用返回简单的错误消息？

public class ErrorResponse {
    private int errorCode;
    private String errorMessage;

    // 构造函数、Getter和Setter方法
}

@RestController
public class MyController {

    @GetMapping("/api/resource")
    public ResponseEntity<?> getResource() {
        try {
            // 执行REST调用逻辑
            // 如果发生错误，抛出异常
        } catch (Exception e) {
            ErrorResponse errorResponse = new ErrorResponse();
            errorResponse.setErrorCode(500);
            errorResponse.setErrorMessage("Internal Server Error");

            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorResponse);
        }
    }
}

ResponseEntity<ErrorResponse> response = restTemplate.getForEntity(url, ErrorResponse.class);
if (response.getStatusCode() == HttpStatus.INTERNAL_SERVER_ERROR) {
    ErrorResponse errorResponse = response.getBody();
    int errorCode = errorResponse.getErrorCode();
    String errorMessage = errorResponse.getErrorMessage();
    // 处理错误信息
}