使用Redis实现JWT令牌主动失效机制

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

spring:
  data:
    redis:
      host: localhost
      port: 6379
      password: *******  #Redis的密码
      database: ***      #指定使用哪个数据源（可不写，但默认是DB0）

@Configuration
@Slf4j
public class RedisConfiguration {
    @Bean
    public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory){
        log.info("开始创建Redis模板对象...0");
        RedisTemplate redisTemplate = new RedisTemplate();
        //设置redis的连接工厂对象
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        //设置redis key的序列化器，这里反应的是Redis图形化工具上value值的不同
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        return redisTemplate;
    }
}

@RestController
@RequestMapping("/user")
@Validated
public class UserController {
 
    @Autowired
    private UserService userService;
    @Autowired
    private RedisTemplate redisTemplate;
 
    /**
     * 用户登录
     * @param username
     * @param password
     * @return
     */
    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{5,16}$") String username ,@Pattern(regexp = "^\\S{5,16}$") String password){
        //根据username查询用户
        User loginUser = userService.findByUserName(username);
        //判断是否存在
        if(loginUser == null){
            return Result.error("用户名错误");
        }
        //判断密码是否正确
        if(Md5Util.getMD5String(password).equals(loginUser.getPassword())){
            //登录成功，创建JWT令牌
            Map<String,Object> claims = new HashMap<>();
            claims.put("id",loginUser.getId());
            claims.put("username",loginUser.getUsername());
            String token = JwtUtil.genToken(claims);
            //将token存储到redis中
            redisTemplate.opsForValue().set(token,token,1, TimeUnit.HOURS);//key,value,时间值,时间单位
            return Result.success(token);
        }
        return Result.error("密码错误");
    }
}

package com.itheima.bigdealboot.interceptors;
 
 
import com.itheima.bigdealboot.utils.JwtUtil;
import com.itheima.bigdealboot.utils.ThreadLocalUtil;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
 
import java.util.Map;
//拦截器
@Component
public class LoginInterceptor implements HandlerInterceptor {
 
    @Autowired
    private RedisTemplate redisTemplate;
 
    @Override
    public boolean preHandle(HttpServletRequest request , HttpServletResponse response , Object handle) throws Exception{
        String token = request.getHeader("Authorization"); //Authorization为请求头的名字
        try {
            //从Redis中国获取相同的token
            String redisToken = (String) redisTemplate.opsForValue().get(token);
            if(redisToken == null){
                //token已经失效,抛出异常
                throw new RuntimeException();
            }
            //令牌验证
            Map<String,Object> claims = JwtUtil.parseToken(token);
            //线程开辟空间存储
            ThreadLocalUtil.set(claims);
            //放行
            return true;
        }catch (Exception e){
            //http响应状态码为401在·
            response.setStatus(401);
            //不放行
            return false;
        }
    }
 
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //清空线程数据
        ThreadLocalUtil.remove();
    }
}

@RestController
@RequestMapping("/user")
@Validated
public class UserController {
 
    @Autowired
    private UserService userService;
    @Autowired
    private RedisTemplate redisTemplate;
 
    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String,String> params,@RequestHeader("Authorization") String token){
        //校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");
        if(StringUtils.hasLength(oldPwd) || StringUtils.hasLength(newPwd) || StringUtils.hasLength(rePwd)){
            return Result.error("缺少必要参数");
        }
        //校验
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User loginUser = userService.findByUserName(username);
        if(!loginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("原密码填写不正确");
        }
        if(!rePwd.equals(newPwd)){
            return Result.error("两次填写的新密码不一样");
        }
        //更新密码
        userService.updatePwd(newPwd);
        //删除redis中对应的token
        redisTemplate.opsForValue().getOperations().delete(token);
        return Result.success();
    }
}