目录
2.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:
3.LoginInterceptor拦截器中,需要验证浏览器携带的令牌,并同时需要获取到Redis中的存储的与之相同的令牌:
一.实现思路:
- 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,并同时需要获取到Redis中的存储的与之相同的令牌,如果获取到证明令牌有效,如果没有获取到则令牌无效
- 当用户修改密码成功后,删除Redis中存储的旧令牌
二.实现代码解析:
1.首先配置Redis的相关配置文件:
(1)pom.xml:
XML
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
(2)在application.yml中配置相关信息:
XML
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)
(3)编写配置类,创建RedisTemplate对象:
我们使用RedisTemplate这个类对象内封装的方法来操作Redis,所以我们在配置类内创建RedisTemplate并用Bean注解将其交给Spring容器管理。
java
@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;
}
}
2.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:
java
@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");
}
}
3.LoginInterceptor拦截器中,需要验证浏览器携带的令牌,并同时需要获取到Redis中的存储的与之相同的令牌:
java
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();
}
}
4.当用户修改密码成功后,删除Redis中存储的旧令牌:
java
@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();
}
}