【SpringBoot】登录优化——SpringBoot集成redis

令牌主动失效机制

• 登录成功后，给浏览器响应令牌的同时，把该令牌存储到redis中
• LoginInterceptor拦截器中，需要验证浏览器携带的令牌，同时需要获取redis中存储的与之相同的令牌
• 用户修改密码成功后，删除redis中存储的旧令牌

        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-data-redisartifactId>
        dependency>

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/big_event
    username: root
    password: root
  data:
    redis:
      host: localhost
      port: 6379

    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{5,16}$") String username, @Pattern(regexp = "^\\S{5,16}$") String password) {
        User loginUser = userService.findByUserName(username);
        if (loginUser == null) {
            return Result.error("用户名错误");
        }
        if (Md5Util.getMD5String(password).equals(loginUser.getPassword())) {
            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
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
            operations.set(token, token, 1, TimeUnit.HOURS);
            return Result.success(token);
        }
        return Result.error("密码错误");
    }

    @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("缺少必要的参数");
        }

        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("原密码不正确");
        }
        if (!rePwd.equals(newPwd)) {
            return Result.error("两次填写的密码不正确");
        }
        // service
        userService.updatePwd(newPwd);
        ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
        operations.getOperations().delete(token);
        return Result.success();
    }

package com.heo.interceptors;

import com.heo.pojo.Result;
import com.heo.utils.JwtUtil;
import com.heo.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.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import java.util.Map;

@Component
public class LoginInterceptor implements HandlerInterceptor {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String token = request.getHeader("Authorization");
        try {
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
            String redisToken = operations.get(token);
            if (redisToken == null) {
                throw new RuntimeException();
            }
            Map<String, Object> claims = JwtUtil.parseToken(token);
            ThreadLocalUtil.set(claims);
            return true;
        } catch (Exception e) {
            response.setStatus(401);
            return false;
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        ThreadLocalUtil.remove();
    }
}