[SpringBoot] Login optimization - SpringBoot integrates redis

Token active invalidation mechanism

• After successful login, while responding to the token with the browser, the token is stored in redis.
• In the LoginInterceptor interceptor, you need to verify the token carried by the browser and obtain the same token stored in redis.
• After the user successfully changes the password, delete the old token stored in redis

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </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();
    }
}

In addition, you can also write a configuration class (not required):

package com.sky.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.StringRedisSerializer;

@Configuration
@Slf4j
public class RedisConfiguration {
    
    
    @Bean
    public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory) {
    
    
        log.info("开始创建redis模板对象...");
        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(防止key出现乱码)
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        return redisTemplate;
    }
}