Springboot2模塊系列：Redis（緩存Token認證）

1 環境

• Ubuntu18.04
• Java1.8.0_191
• Spring Boot2.0.4.RELEASE

2 依賴

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

3 Redis配置

spring:
  redis:
    database: 0
    host: 127.0.0.1 
    port: 6379 
    password: your-password
    jedis:
      pool: 
        max-active: 8 
        max-idle: 8 
        max-wait: -1ms 
        min-idle: 0
server:
  port: 8090

4 接口

package com.company.web.controller;

import java.util.HashMap;
import java.util.Map;

import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import java.util.concurrent.TimeUnit;
import java.util.UUID;

@CrossOrigin(origins="*", maxAge=3600)
@RestController
@RequestMapping("/token")
public class TokenByRedisController {
    @Autowired 
    private StringRedisTemplate redisTemplate;

    /**
     * 依據userId生成Token,存儲到Redis中,
     * 數據過期時間單位爲分鐘,如設定爲1分鐘
     * 數據結構爲userId:token
     * @param userId
     * @return
     */
    @RequestMapping(value="/add", params="userId",method=RequestMethod.PUT)
    public String setToken(@RequestParam("userId") String userId){
        // redisTemplate.opsForValue().set("token","123456token");
        String token = UUID.randomUUID().toString();
        redisTemplate.opsForValue().set(userId, token, 1, TimeUnit.MINUTES);
        return "success";
    }

    /**
     * 依據userId刪除Redis中的Token
     * @param userId
     * @return
     */
    @RequestMapping(value="/delete", params="userId", method=RequestMethod.DELETE)
    public String delToken(@RequestParam("userId") String userId){
        Boolean isDelToken = redisTemplate.delete(userId);
        if(isDelToken){
            return "success";
        }else{
            return "failed";
        }
        
    }

    /**
     * 依據userId獲取Redis中對應的Token
     * @param userId
     * @return
     */
    @RequestMapping(value="/get", params="userId", method=RequestMethod.GET)
    public String getToken(@RequestParam("userId") String userId){
        String token = redisTemplate.opsForValue().get(userId);
        if(token == null){
            return "Token已過期";
        }else{
            return token;
        }
        
    }

    /**
     * 依據userId和Token請求數據,
     * 若Token過期或錯誤,需要重新獲取Token
     * @param userId
     * @param token
     * @return
     */
    @RequestMapping(value="/datas-search", params={"userId", "token"},method=RequestMethod.GET)
    public Map searchDatas(@RequestParam("userId") String userId,@RequestParam("token") String token){
        Map returnMap = new HashMap();
        String tokenInMemory = redisTemplate.opsForValue().get(userId);
        try{
            if(tokenInMemory == null){
                returnMap.put("code", 201);
                returnMap.put("msg", "Token過期,請重新獲取");
                // return returnMap;
            }else{
                if(tokenInMemory.equals(token)){
                    returnMap.put("code", 200);
                    returnMap.put("token", token);
                    returnMap.put("msg", "請求成功");
                }else{
                    returnMap.put("code", 202);
                    returnMap.put("msg", "Token無效,請傳入正確的數據");
                    // return returnMap;
                }
            }
            return returnMap;

        }catch(Exception e){
            e.printStackTrace();
        }
        returnMap.put("code", 400);
        returnMap.put("msg", "參數異常,請檢查參數");
        return returnMap;
    }

}

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【參考文獻】
[1]https://www.cnblogs.com/wusiwee/p/10418379.html
[2]https://www.cnblogs.com/jaythc/p/10200338.html
[3]https://blog.csdn.net/sunhongbing1024/article/details/82017614