java Spring引导和buildResponseEntity（）

Question

我试图从spring-boot-exception-handling编译代码，并从RestExceptionHandler编译部分代码，它扩展了ResponseEntityExceptionHandler

 protected ResponseEntity<Object> handleMissingServletRequestParameter(

    MissingServletRequestParameterException ex, HttpHeaders headers,
    HttpStatus status, WebRequest request) {
    String error = ex.getParameterName() + " parameter is missing";

    return buildResponseEntity(new ApiError(BAD_REQUEST, error, ex));
 }

由于缺少buildResponseEntity()方法，无法编译

buildResponseEntity()到底是做什么的？这个方法是Spring启动框架的一部分吗？我找不到那个方法的任何参考资料

Answer 1

它是链接到的RestExceptionHandler类末尾的私有方法：

    private ResponseEntity<Object> buildResponseEntity(ApiError apiError) {
        return new ResponseEntity<>(apiError, apiError.getStatus());
    }