Java切面统一处理Token设置用户信息

1. 需求概述
2. 解决方案
3. 代码实现
- 3.1 创建解析token
- 3.2 注解+切面填充参数
4. 测试验证

1. 需求概述

常见的后端开发中，接口请求中一般前端都是先通过用户登录获取token，每次接口请求都需要在头信息中携带token信息，后端每次都需要手动处理token信息，从token信息中解析获取用户信息，因为每个接口都需要处理这些公共信息，所以可以采用切面的方式进行统一处理。

2. 解决方案

方案一，通过注解+切面处理请求对象
通过切面获取token信息，然后解析token信息，最后把解析后的token对应的用户信息设置到请求对象中进行统一处理。

方案二，通过mybatis拦截器实现动态sql拼接
实现Interceptor 接口，拦截要执行的sql语句。

@Intercepts({@Signature(type = Executor.class, method = "query", args = {MappedStatement.class, Object.class, RowBounds.class, ResultHandler.class, CacheKey.class, BoundSql.class}),})
public class MybatisLikeSqlInterceptor implements Interceptor {}

3. 代码实现 3.1 创建解析token

token在线解析：https://www.box3.cn/tools/jwt.html
hutool实现jwt：https://www.hutool.cn/docs/#/jwt/JWT%E5%B7%A5%E5%85%B7-JWTUtil


	cn.hutool
	hutool-all
	5.8.0.M4

package com.jerry.market.controller;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.date.DateUtil;
import cn.hutool.json.JSONUtil;
import cn.hutool.jwt.JWT;
import cn.hutool.jwt.JWTUtil;
import com.jerry.market.entity.AuthorizeTokenInfo;
import com.jerry.market.entity.Response;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;

import java.util.Map;


@Slf4j
@RestController
@RequestMapping("/token")
@Api(tags = "TokenController", description = "Token控制器")
public class TokenController {

    private static final String SIGN = "123456";

    
    @PostMapping("/create")
    @ApiOperation(value = "创建token")
    public Response createToken(@RequestBody AuthorizeTokenInfo authorizeUserInfo) {
        if (authorizeUserInfo == null) {
            authorizeUserInfo = AuthorizeTokenInfo.builder()
                    .userId("Jerry")
                    .userName("小智呀")
                    .tenantId("123456")
                    .createTime(DateUtil.date().toString())
                    .build();
        }
        Map authorizeUserInfoMap = BeanUtil.beanToMap(authorizeUserInfo);
        //生成token
        String token = JWTUtil.createToken(authorizeUserInfoMap, SIGN.getBytes());
        log.info("【创建token】创建token成功,token：{}", token);

        return Response.success("创建token成功", token);
    }

    
    @PostMapping("/parse")
    @ApiOperation(value = "解析token")
    public Response parseToken(@RequestParam String rightToken) {
        log.info("【解析token】请求参数，rightToken：{}", rightToken);

        //验证签名
        boolean verify = JWTUtil.verify(rightToken, SIGN.getBytes());
        if (!verify) {
            return Response.success("签名无效，请检查后重试！", null);
        }
        //解析token
        JWT jwt = JWTUtil.parseToken(rightToken);
        AuthorizeTokenInfo authorizeUserInfo = JSONUtil.toBean(jwt.getPayloads(), AuthorizeTokenInfo.class);
        log.info("【解析token】解析token成功，authorizeUserInfo：{}", authorizeUserInfo);

        return Response.success("解析token成功", authorizeUserInfo);
    }
}

3.2 注解+切面填充参数

AutoAssemble

package com.jerry.market.config;

import java.lang.annotation.*;


@Documented
@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface AutoAssemble {
}

AutoAssembleAspect

package com.jerry.market.config;

import cn.hutool.core.date.DateUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import cn.hutool.jwt.JWT;
import cn.hutool.jwt.JWTUtil;
import com.jerry.market.entity.AuthorizeTokenInfo;
import com.jerry.market.entity.BaseReqDTO;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.*;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;

import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;


@Slf4j
@Aspect
@Order(99)
@Component
public class AutoAssembleAspect {
    // 定义切点位置
    private static final String POINT_CUT = "execution(* com.jerry.market.controller..*.*(..))";
    private static final String AUTHORIZATION_TOKEN = "authorizationToken";
    private static final String SIGN = "123456";

    
    @Pointcut(POINT_CUT)
    public void pointCut() {
    }

    
    @Before("pointCut()")
    public void before(JoinPoint joinPoint) throws Throwable {
        //只处理带有AutoAssemble注解的控制器
        AutoAssemble autoAssemble = joinPoint.getTarget().getClass().getAnnotation(AutoAssemble.class);
        Object[] args = joinPoint.getArgs();
        if (autoAssemble == null || args == null) {
            log.info("BaseRequestAssembleAspect End Because No AutoAssemble!");
            return;
        }
        //处理参数
        BaseReqDTO baseReqDTO = null;
        Method method = ((MethodSignature) joinPoint.getSignature()).getMethod();
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getRequest();
        for (Object arg : args) {
            if (arg instanceof BaseReqDTO) {
                baseReqDTO = (BaseReqDTO) arg;
            }
        }
        ArgumentsHandler(baseReqDTO, request, method);
        log.info("BaseRequestAssembleAspect Success!");
    }

    
    private void ArgumentsHandler(BaseReqDTO baseReqDTO, HttpServletRequest request, Method method) {
        log.info("ArgumentsHandler baseReqDTO：{}，request：{}，method：{}", baseReqDTO, request, method);

        if (request != null) {
            //解析token
            String rightToken = request.getHeader(AUTHORIZATION_TOKEN);
            AuthorizeTokenInfo authorizeTokenInfo = parseToken(rightToken);
            //填充用户信息
            if (authorizeTokenInfo != null) {
                baseReqDTO.setCreateUid(authorizeTokenInfo.getUserId());
                baseReqDTO.setCreateName(authorizeTokenInfo.getUserName());
                baseReqDTO.setCreateTime(DateUtil.date());
                baseReqDTO.setUpdateUid(authorizeTokenInfo.getUserId());
                baseReqDTO.setUpdateName(authorizeTokenInfo.getUserName());
                baseReqDTO.setUpdateTime(DateUtil.date());
                baseReqDTO.setTenantId(authorizeTokenInfo.getTenantId());
            } else {
                throw new RuntimeException("鉴权失败");
            }
        }
    }

    
    private AuthorizeTokenInfo parseToken(String rightToken) {
        log.info("parseToken request parameter rightToken：{}", rightToken);
        if (StrUtil.isEmpty(rightToken)) {
            log.info("parseToken rightToken is null.");
            return null;
        }
        //验证签名
        boolean verify = JWTUtil.verify(rightToken, SIGN.getBytes());
        if (!verify) {
            log.info("parseToken verify failed，verify：{}", verify);
            return null;
        }
        //解析token
        JWT jwt = JWTUtil.parseToken(rightToken);
        AuthorizeTokenInfo authorizeUserInfo = JSONUtil.toBean(jwt.getPayloads(), AuthorizeTokenInfo.class);
        log.info("parseToken success，authorizeUserInfo：{}", authorizeUserInfo);

        return authorizeUserInfo;
    }
}

BaseReqDTO

package com.jerry.market.entity;

import com.fasterxml.jackson.annotation.JsonFormat;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;
import java.util.Date;


@Data
@NoArgsConstructor
@AllArgsConstructor
public class BaseReqDTO implements Serializable {

    private static final long serialVersionUID = 8391616799399185153L;
    
    private String tenantId;

    
    private String createUid;
    
    private String createName;
    
    @JsonFormat(timezone = "GMT+8", pattern = "yyyy-MM-dd HH:mm:ss")
    private Date createTime;

    
    private String updateUid;
    
    private String updateName;
    
    @JsonFormat(timezone = "GMT+8", pattern = "yyyy-MM-dd HH:mm:ss")
    private Date updateTime;

}

Activity

package com.jerry.market.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;


@Data
@NoArgsConstructor
@AllArgsConstructor
public class Activity extends BaseReqDTO implements Serializable {
    private static final long serialVersionUID = 774583104822667002L;
    
    private Long id;
    
    private String activityCode;
    
    private String activityName;
    
    private Integer deleted;
}

ActivityController

package com.jerry.market.controller;

import com.alibaba.fastjson.JSON;
import com.jerry.market.config.AutoAssemble;
import com.jerry.market.entity.Activity;
import com.jerry.market.service.ActivityService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.*;
import com.jerry.market.entity.Response;

import java.util.List;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;


@AutoAssemble
@RestController
@RequestMapping("/activity")
@Api(tags = "ActivityController", description = "活动控制器")
public class ActivityController {
    
    @Resource
    private ActivityService activityService;

    
    @ApiOperation("通过主键查询单条数据")
    @GetMapping("/create")
    public Response get(Activity activity) {
        System.out.println("用户基础信息：" + JSON.toJSONString(activity));
        Activity result = activityService.selectById(activity.getId());
        if (result != null) {
            return Response.success("查询成功", result);
        }
        return Response.fail("查询失败");
    }

    
    @ApiOperation("创建活动")
    @PostMapping("/create")
    public Response create(@RequestBody Activity activity) {
        int result = activityService.insert(activity);
        if (result > 0) {
            return Response.success("新增成功", activity);
        }
        return Response.fail("新增失败");
    }

    
    @ApiOperation("修改一条数据")
    @PostMapping("/update")
    public Response update(@RequestBody Activity activity) {
        Activity result = activityService.update(activity);
        if (result != null) {
            return Response.success("修改成功", result);
        }
        return Response.fail("修改失败");
    }

    
    @ApiOperation("通过实体作为筛选条件查询")
    @PostMapping("/selectList")
    public Response> selectList(Activity activity) {
        List activitys = activityService.selectList(activity);
        if (activitys != null) {
            return Response.success("查询成功", activitys);
        }
        return Response.fail("查询失败");
    }

    
    @ApiOperation("分页查询")
    @PostMapping("/selectPage")
    public Response> selectPage(Integer start, Integer limit) {
        List activitys = activityService.selectPage(start, limit);
        if (activitys != null) {
            return Response.success("查询成功", activitys);
        }
        return Response.fail("查询失败");
    }

}

4. 测试验证

Java切面统一处理Token设置用户信息

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