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SpringBoot实战4

news 2025/8/30 2:50:24

SpringBoot实战4

一、优化登录机制通过Redis

在我们使用JWT令牌进行登录验证的时候，不可避免的也会出现一些问题。比如：当用户修改密码后，旧的令牌仍然生效，任然可以用于进行登录操作。因此，我们可以采用**Redis**进行登录的优化。

SpringBoot集成Redis

1、导入Redis起步依赖

2、在yml配置文件中配置Redis的连接信息

3、调用API完成字符串的存取操作

<!--导入Redis的起步依赖-->
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

yml

spring:data:redis:host: localhostport: 6379

@SpringBootTest//如果说在测试类上面添加了这个注解，那么在单元测试方法之前会先初始化Spring容器,这样就可以获取到IOC容器中的bean对象
public class RedisTest {@Autowiredprivate StringRedisTemplate stringRedisTemplate;@Testpublic void testSet(){//网Redis中存储一个键值对ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();operations.set("name","zhangsan");operations.set("id","1",15, TimeUnit.SECONDS);}@Testpublic void testGet(){//从Redis中获取一个键值对ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();String name = operations.get("name");System.out.println(name);}
}

登录优化

实现方法步骤

登录成功的时候，给浏览器响应令牌的同时，将对应的用户信息的令牌存入Redis中

// 登录成功 Map<String,Object> claims=new HashMap<>(); claims.put("id",loginUser.getId()); claims.put("username",loginUser.getUsername()); String token = JwtUtil.genToken(claims); //把token存储在Redis中 ValueOperations<String, String> operations = stringRedisTemplate.opsForValue(); operations.set(token,token,12, TimeUnit.HOURS);

//TODO: 登录
@PostMapping("/login")
public Result<String> login(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password) {// TODO: 查询用户是否存在User loginUser = userService.findByUserName(username);// TODO: 判断用户是否存在if(loginUser==null){return Result.error("用户不存在");}// TODO: 判断密码是否正确else{if(Md5Util.getMD5String(password).equals(loginUser.getPassword())){// 登录成功Map<String,Object> claims=new HashMap<>();claims.put("id",loginUser.getId());claims.put("username",loginUser.getUsername());String token = JwtUtil.genToken(claims);//把token存储在Redis中ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();operations.set(token,token,12, TimeUnit.HOURS);return Result.success(token);}else {return Result.error("密码错误");}}
}

LoginInterceptor拦截器中，需要验证浏览器携带的令牌，同时需要获取到Redis中存储与之对应的相同的令牌

//从Redis中获取相同的token ValueOperations<String, String> operations = stringRedisTemplate.opsForValue(); String redisToken = operations.get(token); if (redisToken == null){ //redis中的token已经失效 throw new RuntimeException("token已失效"); }

@Autowired
private StringRedisTemplate stringRedisTemplate;
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {//在这个拦截器中验证Token---》通过请求头中携带的的tokenString token = request.getHeader("Authorization");//解析Tokentry {//从Redis中获取相同的tokenValueOperations<String, String> operations = stringRedisTemplate.opsForValue();String redisToken = operations.get(token);if (redisToken == null){//redis中的token已经失效throw new RuntimeException("token已失效");}Map<String, Object> claims = JwtUtil.parseToken(token);//TODO:将相关的业务数据存到ThreadLocal中-->方便后续业务逻辑中获取ThreadLocalUtil.set(claims);//TODO:如果解析成功，则放行return true;} catch (Exception e) {response.setStatus(401);//TODO:如果解析失败，则返回错误信息，并且拦截return false;}
}

修改密码的时候就删除旧的令牌

//删除Redis中对应的token ValueOperations<String, String> operations = stringRedisTemplate.opsForValue(); RedisOperations<String, String> redisOperations = operations.getOperations(); redisOperations.delete(token);

// TODO: 更新用户的密码
@PatchMapping("/updatePwd")
public Result updatePwd(@RequestBody Map<String,String> params,@RequestHeader("Authorization") String token){//1、校验参数String oldPwd = params.get("old_pwd");String newPwd = params.get("new_pwd");String rePwd = params.get("re_pwd");//判断只要有一个为空就返回错误信息if(oldPwd==null||newPwd==null||rePwd==null){return Result.error("参数不能为空");}//判断原密码是否正确---》调用Service根据用户名获取原密码，和oldPwd进行比较//用户名通过ThreadLocalUtil存储获取Map<String,Object> map = ThreadLocalUtil.get();String username = (String) map.get("username");User user = userService.findByUserName(username);String pwd = user.getPassword();//原有的密码是进行了加密的，所以需要先对用户输入的密码进行加密再进行比较if(!Md5Util.getMD5String(oldPwd).equals(pwd)){return Result.error("原密码错误");}//判断新密码和确认密码是否一致if(!newPwd.equals(rePwd)){return Result.error("新密码和确认密码不一致");}//2、调用Service完成更新密码userService.updatePwd(newPwd);//删除Redis中对应的tokenValueOperations<String, String> operations = stringRedisTemplate.opsForValue();RedisOperations<String, String> redisOperations = operations.getOperations();redisOperations.delete(token);return Result.success();
}

拦截器中进行再次校验

项目部署

打成jar包，引入依赖，并通过Maven的package进行打包

<build><plugins><!--配置打包插件--><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><version>3.4.4</version></plugin></plugins>
</build>