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

spring:
  data:
    redis:
      host: localhost
      port: 6379
      password: *******  #Redis的密碼
      database: ***      #指定使用哪個(gè)數(shù)據(jù)源（可不寫，但默認(rèn)是DB0）

@Configuration
@Slf4j
public class RedisConfiguration {
    @Bean
    public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory){
        log.info("開始創(chuàng)建Redis模板對(duì)象...0");
        RedisTemplate redisTemplate = new RedisTemplate();
        //設(shè)置redis的連接工廠對(duì)象
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        //設(shè)置redis key的序列化器，這里反應(yīng)的是Redis圖形化工具上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;
 
    /**
     * 用戶登錄
     * @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){
        //根據(jù)username查詢用戶
        User loginUser = userService.findByUserName(username);
        //判斷是否存在
        if(loginUser == null){
            return Result.error("用戶名錯(cuò)誤");
        }
        //判斷密碼是否正確
        if(Md5Util.getMD5String(password).equals(loginUser.getPassword())){
            //登錄成功，創(chuàng)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);
            //將token存儲(chǔ)到redis中
            redisTemplate.opsForValue().set(token,token,1, TimeUnit.HOURS);//key,value,時(shí)間值,時(shí)間單位
            return Result.success(token);
        }
        return Result.error("密碼錯(cuò)誤");
    }
}

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;
//攔截器
@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為請(qǐng)求頭的名字
        try {
            //從Redis中國獲取相同的token
            String redisToken = (String) redisTemplate.opsForValue().get(token);
            if(redisToken == null){
                //token已經(jīng)失效,拋出異常
                throw new RuntimeException();
            }
            //令牌驗(yàn)證
            Map<String,Object> claims = JwtUtil.parseToken(token);
            //線程開辟空間存儲(chǔ)
            ThreadLocalUtil.set(claims);
            //放行
            return true;
        }catch (Exception e){
            //http響應(yīng)狀態(tài)碼為401在·
            response.setStatus(401);
            //不放行
            return false;
        }
    }
 
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //清空線程數(shù)據(jù)
        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){
        //校驗(yàn)參數(shù)
        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("缺少必要參數(shù)");
        }
        //校驗(yàn)
        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("原密碼填寫不正確");
        }
        if(!rePwd.equals(newPwd)){
            return Result.error("兩次填寫的新密碼不一樣");
        }
        //更新密碼
        userService.updatePwd(newPwd);
        //刪除redis中對(duì)應(yīng)的token
        redisTemplate.opsForValue().getOperations().delete(token);
        return Result.success();
    }
}