【笔记】vue+springboot前后端分离实现token登录验证和状态保存的简单实现方案
简单实现
token可用于登录验证和权限管理。
大致步骤分为：
- 前端登录，post用户名和密码到后端。
- 后端验证用户名和密码，若通过，生成一个token返回给前端。
- 前端拿到token用vuex和localStorage管理，登录成功进入首页。
- 之后前端每一次权限操作如跳转路由，都需要判断是否存在token，若不存在，跳转至登录页。
- 前端之后的每一个对后端的请求都要在请求头上带上token，后端查看请求头是否有token，拿到token检查是否过期，返回对应状态给前端。
若token已过期，清除token信息，跳转至登录页。
具体代码如下：前端
- 登录页
ticket-sys 登录
登录
- vuex状态管理
/store/index.js
import Vue from 'vue';
import Vuex from 'vuex';
Vue.use(Vuex);
const store = new Vuex.Store({
state: {
// 存储token
Authorization: localStorage.getItem('Authorization') ? localStorage.getItem('Authorization') : ''
},
mutations: {
// 修改token，并将token存入localStorage
changeLogin (state, user) {
state.Authorization = user.Authorization;
localStorage.setItem('Authorization', user.Authorization);
}
}
});
export default store;- 路由守卫
/router/index.js
import Vue from 'vue'
import VueRouter from 'vue-router'
import Home from '../views/Home.vue'
Vue.use(VueRouter)
const routes = [
{
path: '/home',
name: 'home',
component: Home,
}
,
{
path: '/about',
name: 'about',
// route level code-splitting
// this generates a separate chunk (about.[hash].js) for this route
// which is lazy-loaded when the route is visited.
component: function () {
return import(/* webpackChunkName: "about" */ '../views/About.vue')
}
},
{
path:'/login',
name:'login',
component:function () {
return import('../views/Login.vue');
}
}
]
const router = new VueRouter({
退出登录
携带token的测试请求
mode: 'history',
base: process.env.BASE_URL,
routes
});
// 导航守卫
// 使用 router.beforeEach 注册一个全局前置守卫，判断用户是否登陆
router.beforeEach((to, from, next) => {
if (to.path === '/login') {
next();
} else {
let token = localStorage.getItem('Authorization');
if (token === 'null' || token === '') {
next('/login');
} else {
next();
}
}
});
export default router- 主文件中注册并添加拦截器
/main.js
import Vue from 'vue'
import App from './App.vue'
import router from './router'
import './plugins/element.js'
import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';
import axios from 'axios' ;
import Vuex from 'vuex' //引入状态管理
Vue.prototype.$axios= axios ;
Vue.use(Vuex) ;
Vue.config.productionTip = false
Vue.use(ElementUI)
//这里要导入store
import store from "./store";
// 添加请求拦截器，在请求头中加token
axios.interceptors.request.use(
config => {
if (localStorage.getItem('Authorization')) {
config.headers.Authorization = localStorage.getItem('Authorization');
}
return config;
},
error => {
return Promise.reject(error);
});
new Vue({
//这里要配置store
router, store:store,
render: function (h) { return h(App) }
}).$mount('#app')- home页面
退出登录
携带token的测试请求
后端
- 登录controller
package com.zxc.ticketsys.controller;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.web.bind.annotation.*;
import java.util.HashMap;
import java.util.Map;
@RestController
@RequestMapping("/user")
public class UserController{
@RequestMapping(value = "/login",method = RequestMethod.POST)
@ResponseBody
public String login(@RequestHeader Map he,@RequestBody Map para) throws JsonProcessingException {
System.out.println(he);
String username=(String)para.get("username");
String password=(String)para.get("password");
HashMap hs=new HashMap<>();
hs.put("token","token"+username+password);
ObjectMapper objectMapper=new ObjectMapper();
return objectMapper.writeValueAsString(hs);
}
@RequestMapping(value = "/test",method = RequestMethod.GET)
@ResponseBody
public String test(@RequestHeader Map he) throws JsonProcessingException {
System.out.println(he);
HashMap hs=new HashMap<>();
ObjectMapper objectMapper=new ObjectMapper();
return objectMapper.writeValueAsString(hs);
}
} 测试
- 登录
此时后台的请求头：
{host=localhost:8088, connection=keep-alive, accept=application/json, text/plain, */*, origin=http://localhost:8080, user-agent=Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36, sec-fetch-site=same-site, sec-fetch-mode=cors, referer=http://localhost:8080/home, accept-encoding=gzip, deflate, br, accept-language=zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7}- 登录成功，进入home页面
后端返回的token：
- 前端持有token，访问测试接口
后端收到请求头：
{host=localhost:8088, connection=keep-alive, accept=application/json, text/plain, */*, origin=http://localhost:8080, authorization=Bearer tokenadminadmin, user-agent=Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36, sec-fetch-site=same-site, sec-fetch-mode=cors, referer=http://localhost:8080/home, accept-encoding=gzip, deflate, br, accept-language=zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7}带有token，可以进行验证
- 退出登录，清空token
后台实际应用
在实际的应用中，一般需要一个生成token的工具类和一个拦截器对请求进行拦截。
- token生成工具类
/utils/TokenUtil.java
package com.zxc.ticketsys.utils;
import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;
import com.zxc.ticketsys.model.User;
import java.util.Date;
public class TokenUtil {
private static final long EXPIRE_TIME= 10*60*60*1000;
private static final String TOKEN_SECRET="txdy"; //密钥盐
/**
* 签名生成
* @param user
* @return
*/
public static String sign(User user){
String token = null;
try {
Date expiresAt = new Date(System.currentTimeMillis() + EXPIRE_TIME);
token = JWT.create()
.withIssuer("auth0")
.withClaim("username", user.getUsername())
.withExpiresAt(expiresAt)
// 使用了HMAC256加密算法。
.sign(Algorithm.HMAC256(TOKEN_SECRET));
} catch (Exception e){
e.printStackTrace();
}
return token;
}
/**
* 签名验证
* @param token
* @return
*/
public static boolean verify(String token){
try {
JWTVerifier verifier = JWT.require(Algorithm.HMAC256(TOKEN_SECRET)).withIssuer("auth0").build();
DecodedJWT jwt = verifier.verify(token);
System.out.println("认证通过：");
System.out.println("username: " + jwt.getClaim("username").asString());
System.out.println("过期时间： " + jwt.getExpiresAt());
return true;
} catch (Exception e){
return false;
}
}
}- 拦截器类
/interceptor/TokenInterceptor.java
package com.zxc.ticketsys.interceptor;
import com.alibaba.fastjson.JSONObject;
import com.zxc.ticketsys.utils.TokenUtil;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
public class TokenInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response,Object handler)throws Exception{
if(request.getMethod().equals("OPTIONS")){
response.setStatus(HttpServletResponse.SC_OK);
return true;
}
response.setCharacterEncoding("utf-8");
String token = request.getHeader("token");
if(token != null){
boolean result = TokenUtil.verify(token);
if(result){
System.out.println("通过拦截器");
return true;
}
}
response.setCharacterEncoding("UTF-8");
response.setContentType("application/json; charset=utf-8");
try{
JSONObject json = new JSONObject();
json.put("msg","token verify fail");
json.put("code","50000");
response.getWriter().append(json.toJSONString());
System.out.println("认证失败，未通过拦截器");
}catch (Exception e){
e.printStackTrace();
response.sendError(500);
return false;
}
return false;
}
}- 配置拦截器
/config/WebConfiguration.java
注意最好写在一个配置类里，且WebMvcConfigurationSupport和WebMvcConfigurerAdapter不要同时存在
这里包括处理跨域的配置，而且全部改为implements WebMvcConfigurer接口
package com.zxc.ticketsys.config;
import com.zxc.ticketsys.interceptor.TokenInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ConcurrentTaskExecutor;
import org.springframework.web.servlet.config.annotation.*;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Executors;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
/**
* 跨域请求支持/token拦截
* tip:只能写在一个配置类里
*/
@Configuration
public class WebConfiguration implements WebMvcConfigurer {
private TokenInterceptor tokenInterceptor;
//构造方法
public WebConfiguration(TokenInterceptor tokenInterceptor){
this.tokenInterceptor = tokenInterceptor;
}
@Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/**")
.allowCredentials(true)
.allowedHeaders("*")
.allowedMethods("*")
.allowedOrigins("*");
}
@Override
public void configureAsyncSupport(AsyncSupportConfigurer configurer){
configurer.setTaskExecutor(new ConcurrentTaskExecutor(Executors.newFixedThreadPool(3)));
configurer.setDefaultTimeout(30000);
}
@Override
public void addInterceptors(InterceptorRegistry registry){
List excludePath = new ArrayList<>();
//排除拦截，除了注册登录(此时还没token)，其他都拦截
excludePath.add("/user/register"); //登录
excludePath.add("/user/login"); //注册
excludePath.add("/static/**"); //静态资源
excludePath.add("/assets/**"); //静态资源
registry.addInterceptor(tokenInterceptor)
.addPathPatterns("/**")
.excludePathPatterns(excludePath);
WebMvcConfigurer.super.addInterceptors(registry);
}
} - 控制器类
package com.zxc.ticketsys.controller;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.zxc.ticketsys.model.User;
import com.zxc.ticketsys.utils.TokenUtil;
import org.springframework.web.bind.annotation.*;
import java.util.HashMap;
import java.util.Map;
@RestController
@RequestMapping("/user")
public class UserController{
@RequestMapping(value = "/login",method = RequestMethod.POST)
@ResponseBody
public String login(@RequestBody Map para) throws JsonProcessingException {
String username=(String)para.get("username");
String password=(String)para.get("password");
String token= TokenUtil.sign(new User(username,password));
HashMap hs=new HashMap<>();
hs.put("token",token);
ObjectMapper objectMapper=new ObjectMapper();
return objectMapper.writeValueAsString(hs);
}
@RequestMapping(value = "/test",method = RequestMethod.POST)
@ResponseBody
public String test(@RequestBody Map para) throws JsonProcessingException {
HashMap hs=new HashMap<>();
hs.put("data","data");
ObjectMapper objectMapper=new ObjectMapper();
return objectMapper.writeValueAsString(hs);
}
} - 测试
- 登录
成功登录，获得token。
- 不带token访问test接口
被拦截，访问失败。
带有效token访问test接口
访问成功，获得数据。
完整项目代码
github