如何解决整数溢出问题？

news2024/9/30 2:02:50

1、问题解析

当以整数数据类型（包括字节、短、长和其他类型）存储的值过大（大于变量可容纳的最大值）的值时，将发生整数溢出（或环
绕）。整数的最高有效位丢失，而其余值则相对于最小值（对于带符号类型，为 0 或负值）。简单来说就是实体类是个Integer类型，但是请求的时候传了值超过了Integer的最大取值范围报错了，但是不能返回异常响应（如500、400等），否则就认为没有对这种情况进行处理。

2、修复建议

在问题api成批分配（跳转链接）的基础上修改，针对InputCoercionException异常单独处理。

@ExceptionHandler(value = HttpMessageNotReadableException.class)
    public ResponseEntity<ResponseDTO> methodHttpMessageNotReadableExceptionHandler(
            HttpServletRequest request, HttpMessageNotReadableException e) {
        // 判断是否是整数溢出问题
        if (e.getRootCause() instanceof InputCoercionException || e.getRootCause() instanceof InvalidFormatException) {
            logger.error("类型转换错误");
            logger.error("请求地址：{}", request.getServletPath());
            ResponseDTO responseDTO = WebUtils.createFailureResponse(ErrorCodeEnum.S_REQ_PARAM_ERROR, "非法的请求参数");
            return new ResponseEntity<>(responseDTO, HttpStatus.OK);
        }
        logger.error("请求body中存在实体类中不存在的参数");
        logger.error("请求地址：{}", request.getServletPath());
        ResponseDTO responseDTO = WebUtils.createFailureResponse(ErrorCodeEnum.S_REQ_PARAM_ERROR, "请求参数不正确");
        return new ResponseEntity<>(responseDTO, HttpStatus.INTERNAL_SERVER_ERROR);
    }

3、问题重新参数

请求参数的 ->“page” 本来应该传1 ，但是传了99999999999999999999，

测试传了page为99999999999999999999的请求和响应：

POST	/ngbsp-api/user-act/admin/discuss/black/list	HTTP/1.1
Host:	10.110.120.101:89
Accept:	application/json,	text/plain,	*/*
X-CSRF-TOKEN:	a6a5d13a-74e5-4507-bbc9-4fc0ccf94d7a
X-Requested-With:	XMLHttpRequest
User-Agent:	Mozilla/5.0	(Windows	NT	10.0;	Win64;	x64)	AppleWebKit/537.36	(KHTML,	like	Gecko)	Chrome/126.0.0.0	Safari/537.36Content-Type:	application/json;
Origin:	http://10.110.120.101:89
Referer:	http://10.110.120.101:89/ngbsp/
Accept-Language:	en-US
Connection:	keep-alive
Cookie:	LCUID=LzWATXrrydZKuIW4n18FFtf1mAoEUwqHy2AO0zGqMk9wz7l3tiOqZXpz/seb3o4IOyVQA4jS93S2k5OpJyRS8W62Y5Rxx+fTURpA+eQzD5g=;NGBSPSID=OGEwMjlmOTAtMDEzZi00NGY2LTk0OGQtOTM3YTg1NjYyYThj;	LCSSID=OGEwMjlmOTAtMDEzZi00NGY2LTk0OGQtOTM3YTg1NjYyYThjContent-Length:	58
{
	"page":	 99999999999999999999,
	"pageSize":	10,
	"userPhone":	""
}
HTTP/1.1	500	Internal	Server	Error
Server:	nginx/1.21.6
Date:	Wed,	24	Jul	2024	09:02:34	GMT
Content-Type:	application/json
Transfer-Encoding:	chunked
Connection:	keep-alive
Cache-Control:	no-cache,	no-store,	max-age=0,	must-revalidate
Expires:	0
Pragma:	no-cache
Referrer-Policy:	no-referrer
X-Content-Type-Options:	nosniff
X-Frame-Options:	DENY
X-Xss-Protection:	1	;	mode=block
{
	"timestamp":	"2024-07-24	17:02:34",
	"status":	500,
	"error":	"Internal	Server	Error",
	"path":	"/user-act/admin/discuss/black/list"
}