Springboot使用@Valid 和AOP做参数校验及日志输出问题

项目背景

最近在项目上对接前端的的时候遇到了几个问题

1.经常要问前端要请求参数

2.要根据请求参数写大量if...else，代码散步在 Controller 中，影响代码质量

3.为了解决问题1，到处记日志，导致到处改代码

解决方案

为了解决这类问题，我使用了@Valid 做参数校验，并使用AOP记录前端请求日志

1.Bean实体类增加注解

对要校验的实体类增加注解，如果实体类中有List结构，就在List上加@Valid

@Valid注解

UserInfo

package com.zero.check.query;
import lombok.Data;
import org.hibernate.validator.constraints.EAN;
import org.springframework.stereotype.Component;
import javax.validation.Valid;
import javax.validation.constraints.*;
import java.util.List;
/**
* @Description:
* @author: wei.wang
* @since: 2019/11/21 15:05
* @history: 1.2019/11/21 created by wei.wang
*/
@Component
@Data
public class UserInfo {
@NotBlank(message = "主键不能为空")
@Pattern(regexp = "^[1-9]\\d*$",message = "主键范围不正确")
private String id;
@Valid
@NotEmpty(message = "用户列表不能为空")
private List<User> userList;
@NotNull(message = "权限不能为空")
@Min(value = 1, message = "权限范围为[1-99]")
@Max(value = 99, message = "权限范围为[1-99]")
private Long roleId;
}

User

package com.zero.check.query;

import lombok.Data;
import org.springframework.stereotype.Component;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotNull;
import java.util.List;
/**
* @Description:
* @author: wei.wang
* @since: 2019/11/21 16:03
* @history: 1.2019/11/21 created by wei.wang
*/
@Component
@Data
public class User {
@NotBlank(message = "用户工号不能为空")
private String userId;
@NotBlank(message = "用户名称不能为空")
private String userName;
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
}

2.Controller层

在需要校验的pojo前边添加@Validated，在需要校验的pojo后边添加BindingResult br接收校验出错信息，需要注意的是, BindingResult result一定要跟在 @Validated 注解对象的后面（必须是实体类），而且当有多个@Validated注解时,每个注解对象后面都需要添加一个 BindingResult，而实际使用时由于在WebLogAspect切点读取了请求数据，会导致在Controller层请求参数中读不到数据，这里需要修改其他内容，详见Git

DataCheckController
package com.zero.check.controller;
import com.zero.check.query.User;
import com.zero.check.query.UserInfo;
import com.zero.check.utils.Response;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.*;
import javax.validation.Valid;
/**
* @Description:
* @author: wei.wang
* @since: 2019/11/21 14:57
* @history: 1.2019/11/21 created by wei.wang
*/
@RestController
@RequestMapping(value = "/check")
public class DataCheckController {
@PostMapping(value = "/userValidPost")
public Response queryUserPost(@Valid @RequestBody UserInfo userInfo, BindingResult result) {
return Response.ok().setData("Hello " + userInfo.getId());
}
@GetMapping(value = "/userValidGet")
public Response queryUserGet(@Valid User user, BindingResult result) {
return Response.ok().setData("Hello " + user.getUserName());
}
}

3.AOP

定义切点@Pointcut("execution( com.zero.check.controller.. (..))")，定义后可监控com.zero.check.controller包和子包里任意方法的执行

如果输入参数不能通过校验，就直接抛出异常，由于定义了UserInfoHandler拦截器，可以拦截处理校验错误，这样就可以省略大量的非空判断，让Controller层专注业务代码，并且将日志集中在WebLogAspect中处理，不会因为记录日志导致要到处改代码

if (bindingResult.hasErrors()) {
FieldError error = bindingResult.getFieldError();
throw new UserInfoException(Response.error(error.getDefaultMessage()).setData(error));
}

UserInfoHandler
package com.zero.check.handler;

import com.zero.check.exception.UserInfoException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

/**
* @Description:
* @author: wei.wang
* @since: 2019/11/21 15:04
* @history: 1.2019/11/21 created by wei.wang
*/
@RestControllerAdvice
public class UserInfoHandler {

/**
* 校验错误拦截处理
*
* @param e 错误信息集合
* @return 错误信息
*/
@ExceptionHandler(UserInfoException.class)
public Object handle(UserInfoException e) {
return e.getR();
}
}

WebLogAspect

package com.zero.check.aspect;

import com.alibaba.fastjson.JSON;
import com.zero.check.exception.UserInfoException;
import com.zero.check.utils.Response;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import javax.servlet.http.HttpServletRequest;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
/**
* @Description:
* @author: wei.wang
* @since: 2019/11/21 13:47
* @history: 1.2019/11/21 created by wei.wang
*/
@Aspect
@Component
public class WebLogAspect {
private Logger logger = LoggerFactory.getLogger(WebLogAspect.class);
private final String REQUEST_GET = "GET";
private final String REQUEST_POST = "POST";
/**
* 定义切点，切点为com.zero.check.controller包和子包里任意方法的执行
*/
@Pointcut("execution(* com.zero.check.controller..*(..))")
public void webLog() {
}
/**
* 前置通知，在切点之前执行的通知
*
* @param joinPoint 切点
*/
@Before("webLog() &&args(..,bindingResult)")
public void doBefore(JoinPoint joinPoint, BindingResult bindingResult) {
if (bindingResult.hasErrors()) {
FieldError error = bindingResult.getFieldError();
throw new UserInfoException(Response.error(error.getDefaultMessage()).setData(error));
}
//获取请求参数
try {
String reqBody = this.getReqBody();
logger.info("REQUEST: " + reqBody);
} catch (Exception ex) {
logger.info("get Request Error: " + ex.getMessage());
}
}
/**
* 后置通知，切点后执行
*
* @param ret
*/
@AfterReturning(returning = "ret", pointcut = "webLog()")
public void doAfterReturning(Object ret) {
//处理完请求，返回内容
try {
logger.info("RESPONSE: " + JSON.toJSONString(ret));
} catch (Exception ex) {
logger.info("get Response Error: " + ex.getMessage());
}
}
/**
* 返回调用参数
*
* @return ReqBody
*/
private String getReqBody() {
//从获取RequestAttributes中获取HttpServletRequest的信息
HttpServletRequest request = this.getHttpServletRequest();
//获取请求方法GET/POST
String method = request.getMethod();
Optional.ofNullable(method).orElse("UNKNOWN");
if (REQUEST_POST.equals(method)) {
return this.getPostReqBody(request);
} else if (REQUEST_GET.equals(method)) {
return this.getGetReqBody(request);
}
return "get Request Parameter Error";
}
/**
* 获取request
* Spring对一些（如RequestContextHolder、TransactionSynchronizationManager、LocaleContextHolder等）中非线程安全状态的bean采用ThreadLocal进行处理
* 让它们也成为线程安全的状态
*
* @return
*/
private HttpServletRequest getHttpServletRequest() {
//获取RequestAttributes
RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
return (HttpServletRequest) requestAttributes.resolveReference(RequestAttributes.REFERENCE_REQUEST);
}
/**
* 获取GET请求数据
*
* @param request
* @return
*/
private String getGetReqBody(HttpServletRequest request) {
Enumeration<String> enumeration = request.getParameterNames();
Map<String, String> parameterMap = new HashMap<>(16);
while (enumeration.hasMoreElements()) {
String parameter = enumeration.nextElement();
parameterMap.put(parameter, request.getParameter(parameter));
}
return parameterMap.toString();
}
/**
* 获取POST请求数据
*
* @param request
* @return 返回POST参数
*/
private String getPostReqBody(HttpServletRequest request) {
StringBuilder stringBuilder = new StringBuilder();
try (InputStream inputStream = request.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream))) {
char[] charBuffer = new char[128];
int bytesRead = -1;
while ((bytesRead = bufferedReader.read(charBuffer)) > 0) {
stringBuilder.append(charBuffer, 0, bytesRead);
}
} catch (IOException e) {
logger.info("get Post Request Parameter err : " + e.getMessage());
}
return stringBuilder.toString();
}
}

4.测试

POST接口

localhost:9004/check/userValidPost

请求参数

{
"id":"12",
"userList": [
{
"userId": "Google",
"userName": "http://www.google.com"
},
{
"userId": "S",
"userName": "http://www.SoSo.com"
},
{
"userId": "SoSo",
"userName": "http://www.SoSo.com"
}
],
"roleId":"11"
}

返回结果

{
"code": "ok",
"data": "Hello 12",
"requestid": "706cd81db49d4c9795e5457cebb1ba8c"
}

请求参数

{
"id":"1A2",
"userList": [
{
"userId": "Google",
"userName": "http://www.google.com"
},
{
"userId": "S",
"userName": "http://www.SoSo.com"
},
{
"userId": "SoSo",
"userName": "http://www.SoSo.com"
}
],
"roleId":"11"
}

返回结果

{
"code": "error",
"message": "主键范围不正确",
"data": {
"codes": [
"Pattern.userInfo.id",
"Pattern.id",
"Pattern.java.lang.String",
"Pattern"
],
"arguments": [
{
"codes": [
"userInfo.id",
"id"
],
"arguments": null,
"defaultMessage": "id",
"code": "id"
},
[],
{
"defaultMessage": "^[1-9]\\d*$",
"arguments": null,
"codes": [
"^[1-9]\\d*$"
]
}
],
"defaultMessage": "主键范围不正确",
"objectName": "userInfo",
"field": "id",
"rejectedValue": "1A2",
"bindingFailure": false,
"code": "Pattern"
},
"requestid": "076c899495b448b59f1b133efd130061"
}

控制台输出

可以看到第一次请求时WebLogAspect成功打印了请求数据和返回结果,而第二次因为没有通过校验，没有进入WebLogAspect，所以没有打印数据

2019-11-21 22:50:43.283 INFO 94432 --- [nio-9004-exec-2] com.zero.check.aspect.WebLogAspect    : REQUEST: {
"id":"1",
"userList": [
{
"userId": "Google",
"userName": "http://www.google.com"
},
{
"userId": "S",
"userName": "http://www.SoSo.com"
},
{
"userId": "SoSo",
"userName": "http://www.SoSo.com"
}
],
"roleId":"11"
}
2019-11-21 22:50:43.345 INFO 94432 --- [nio-9004-exec-2] com.zero.check.aspect.WebLogAspect    : RESPONSE: {"code":"ok","data":"Hello 1","requestid":"286174a075c144eeb0de0b8dbd7c1851"}

GET接口

localhost:9004/check/userValidGet?userId=a&userName=zero

返回结果

{
"code": "ok",
"data": "Hello zero",
"requestid": "9b5ea9bf1db64014b0b4d445d8baf9dc"
}
localhost:9004/check/userValidGet?userId=a&userName=

返回结果

{
"code": "error",
"message": "用户名称不能为空",
"data": {
"codes": [
"NotBlank.user.userName",
"NotBlank.userName",
"NotBlank.java.lang.String",
"NotBlank"
],
"arguments": [
{
"codes": [
"user.userName",
"userName"
],
"arguments": null,
"defaultMessage": "userName",
"code": "userName"
}
],
"defaultMessage": "用户名称不能为空",
"objectName": "user",
"field": "userName",
"rejectedValue": "",
"bindingFailure": false,
"code": "NotBlank"
},
"requestid": "5677d93c084d418e88cf5bb8547c5a2e"
}

控制台输出

可以看到第一次请求时WebLogAspect成功打印了请求和返回结果,而第二次因为没有通过校验，没有进入WebLogAspect，所以没有打印数据

2019-11-21 23:18:50.755 INFO 94432 --- [nio-9004-exec-9] com.zero.check.aspect.WebLogAspect    : REQUEST: {userName=zero, userId=a}
2019-11-21 23:18:50.756 INFO 94432 --- [nio-9004-exec-9] com.zero.check.aspect.WebLogAspect    : RESPONSE: {"code":"ok","data":"Hello zero","requestid":"422edc9cd59d45bea275e579a67ccd0c"}

5.代码Git地址

git@github.com:A-mantis/SpringBootDataCheck.git

总结

以上所述是小编给大家介绍的Springboot使用@Valid 和AOP做参数校验及日志输出问题，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！
如果你觉得本文对你有帮助，欢迎转载，烦请注明出处，谢谢！

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