面试过不少Java开发,能把权限这块说的清楚的实在是很少,不少人由于公司项目职责问题,很难学到这类相关的流程和技术,本文梳理一个简单的场景,实现一个基于jwt先后端分离的权限框架。前端
image-20200709160301317vue
image-20200709160427929java
本文技术选型为SpringBoot+JWT+Redis, 实现上图的登陆流程和鉴权流程,并提供完整项目代码。react
「本项目已实现以下功能」:git
使用Docker一行命令构建启动Redis,命令以下github
docker run -itd --name redis-test -p 6379:6379 redis --requirepass "123456redis"
指定端口:6379
web
指定密码:123456redis
面试
客户端链接测试,问题不大~redis
建立SpringBoot项目并引入JWT依赖spring
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.9.1</version>
</dependency>
其实主要是引了这个包,其余的就不贴出来了。主要有redis以及json相关的,完整代码都在项目能够本身看
UserController
@PostMapping("/login")
public UserVO login(@RequestBody LoginDTO loginDTO) {
return userService.login(loginDTO);
}
UserService
用户信息就模拟的了,都看的懂。登陆成功后根据uid生产jwt,而后缓存到redis,封装结果给到前端
package com.lzp.auth.service;
@Service
public class UserService {
@Value("${server.session.timeout:3000}")
private Long timeout;
@Autowired
private RedisUtils redisUtils;
final static String USER_NAME = "admin";
//密码 演示用就不作加密处理了
final static String PWD = "admin";
public UserVO login(LoginDTO loginDTO){
User user = getByName(loginDTO.getUserName());
//用户信息校验和查询
if (user == null){
throw new ServiceException(ResultCodeEnum.LOGIN_FAIL);
}
//密码校验
if(!PWD.equals(loginDTO.getPwd())){
throw new ServiceException(ResultCodeEnum.LOGIN_FAIL);
}
//缓存用户信息并设置过时时间
UserVO userVO = new UserVO();
userVO.setName(user.getName());
userVO.setUid(user.getUid());
userVO.setToken(JWTUtils.generate(user.getUid()));
//信息入库redis
redisUtils.set(RedisKeyEnum.OAUTH_APP_TOKEN.keyBuilder(userVO.getUid()), JSONObject.toJSONString(userVO), timeout);
return userVO;
}
/**
* 经过用户名获取用户
* @param name
* @return
*/
public User getByName(String name){
User user = null;
if(USER_NAME.equals(name)){
user = new User("1","张三","Aa123456");
}
return user;
}
}
LoginInterceptor
package com.lzp.auth.config;
import com.lzp.auth.exception.ServiceException;
import com.lzp.auth.utils.JWTUtils;
import com.lzp.auth.utils.ResultCodeEnum;
import com.lzp.auth.utils.SessionContext;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Slf4j
public class LoginInterceptor extends HandlerInterceptorAdapter {
@Autowired
StringRedisTemplate redisTemplate;
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
String token = request.getHeader("token");
String requestURI = request.getRequestURI().replaceAll("/+", "/");
log.info("requestURI:{}",requestURI);
if (StringUtils.isEmpty(token)) {
throw new ServiceException(ResultCodeEnum.AUTH_FAIL);
}
Claims claim = JWTUtils.getClaim(token);
if(claim == null){
throw new ServiceException(ResultCodeEnum.AUTH_FAIL);
}
String uid = null;
try {
uid = JWTUtils.getOpenId(token);
} catch (Exception e) {
throw new ServiceException(ResultCodeEnum.AUTH_FAIL);
}
//用户id放到上下文 能够当前请求进行传递
request.setAttribute(SessionContext.USER_ID_KEY, uid);
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
}
}
package com.lzp.auth.config;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.reactive.CorsWebFilter;
import org.springframework.web.cors.reactive.UrlBasedCorsConfigurationSource;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.util.pattern.PathPatternParser;
@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter implements ApplicationContextAware {
private ApplicationContext applicationContext;
public WebMvcConfig() {
super();
}
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
super.addResourceHandlers(registry);
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
this.applicationContext = applicationContext;
}
@Bean
public CorsWebFilter corsFilter() {
CorsConfiguration config = new CorsConfiguration();
config.addAllowedMethod("*");
config.addAllowedOrigin("*");
config.addAllowedHeader("*");
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(new PathPatternParser());
source.registerCorsConfiguration("/**", config);
return new CorsWebFilter(source);
}
@Bean
LoginInterceptor loginInterceptor() {
return new LoginInterceptor();
}
@Override
public void addInterceptors(InterceptorRegistry registry) {
//拦截规则:除了login,其余都拦截判断
registry.addInterceptor(loginInterceptor())
.addPathPatterns("/**")
.excludePathPatterns("/user/login");
super.addInterceptors(registry);
}
}
「postMan调试」
模拟成功和失败场景
成功如上图,返回用户信息和Token
测试非白名单接口失败如上图
「使用token再来访问当前接口」
至此本项目就完美结束了哦完美~
https://github.com/pengziliu/GitHub-code-practice
这个仓库除了这个还有更多精彩代码哟
已撸完部分开源轮子,更多精彩正在路上
模块 | 所属开源项目 | 项目介绍 |
---|---|---|
springboot_api_encryption |
rsa-encrypt-body-spring-boot | Spring Boot接口加密,能够对返回值、参数值经过注解的方式自动加解密 。 |
simpleimage-demo |
simpleimage | 图片处理工具类,具备加水印、压缩、裁切等功能 |
xxl-job-demo |
xxl-job | 分布式定时任务使用场景 |
xxl-sso-demo |
xxl-sso | 单点登陆功能 |
vuepress-demo |
vuepress | 创建本身的知识档案库 |
xxl-conf-demo |
xxl-conf | 分布式配置中心 |
Shardingsphere-demo |
Shardingsphere | 分库分表 |
easyexcel-demo |
easyexcel | excel操做工具类 |
kaptcha-demo | kaptcha | 先后端分离验证码方案 |
https://mp.weixin.qq.com/s/aWfEWH_3qy-YLa0IUA1FeA