spring - 如何将 Controller 方法内部生成的变量传递给 ExceptionHandler

Question

我需要将 Controller 方法内部生成的变量传递给异常处理程序。

变量是日志类，其中的信息由变量服务类设置。

下面的代码将解释我的意图。

@RequestMapping(value = "", method = RequestMethod.POST)
public @ResponseBody byte[] handleRequest(HttpServletRequest httpReq){
    CmpLog cmpLog = new CmpLog();
    cmpLog.setClient_ip(getClientIp(httpReq));
    ....
    testService.businessLogic(cmpLog);
    }



@ExceptionHandler(Exception.class)
@ResponseStatus(value=HttpStatus.BAD_REQUEST)
public @ResponseBody byte[] exceptionHandler(HttpServletRequest request, Exception e){

    // How do I somehow get the cmpLog in the above method?
    cmpLogService.create(cmpLog);
}

Answer 1

在handleRequest中你可以做

httpReq.setAttribute("cmpLog", cmpLog ) (生成异常之前的某个位置)

并且在exceptionHandler中你可以做

CmpLog cmpLog = (CmpLog)request.getAttribute("cmpLog")