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Springboot使用@Valid 和AOP做参数校验及日志输出问题

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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

注解 备注
@Null 只能为null
@NotNull 必须不为null
@Max(value) 必须为一个不大于 value 的数字
@Min(value) 必须为一个不小于 value 的数字
@AssertFalse 必须为false
@AssertTrue 必须为true
@DecimalMax(value) 必须为一个小于等于 value 的数字
@DecimalMin(value) 必须为一个大于等于 value 的数字
@Digits(integer,fraction) 必须为一个小数,且整数部分的位数不能超过integer,小数部分的位数不能超过fraction
@Past 必须是 日期 ,且小于当前日期
@Future 必须是 日期 ,且为将来的日期
@Size(max,min) 字符长度必须在min到max之间
@Pattern(regex=,flag=) 必须符合指定的正则表达式
@NotEmpty 必须不为null且不为空(字符串长度不为0、集合大小不为0)
@NotBlank 必须不为空(不为null、去除首位空格后长度不为0),不同于@NotEmpty,@NotBlank只应用于字符串且在比较时会去除字符串的空格
@Email 必须为Email,也可以通过正则表达式和flag指定自定义的email格式

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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