SpringBoot+Vue前后台分离使用session存储用户状态

迷人闹G

擅长邻域：Java,HTML,MySQL,Linux,SpringBoot,SpringCloud,Vue,Layui,小程序

分类： Java 标签： SpringBoot Vue

2021-05-07 09:01:04 1626浏览

SpringBoot+Vue前后台分离使用session存储用户状态昨天遇到了一个问题就是前后端分离的项目不用redis怎么实现登录用户状态管理

因为前后端分离的话普通情况下是拿不到htpSession这个对象的不像JSP一样

先配置后台跨域

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration
public class CorsConfig extends WebMvcConfigurerAdapter {
    @Override
	public void addCorsMappings(CorsRegistry registry) {
		registry.addMapping("/**").allowedOrigins("*")
				.allowedMethods("GET", "HEAD", "POST","PUT", "DELETE", "OPTIONS")
				.allowCredentials(true).maxAge(6000);
	}
}

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName = "CorsFilter ")
public class CorsFilter implements Filter {
    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) res;
 
        HttpServletRequest reqs = (HttpServletRequest) req;
 
        // response.setHeader("Access-Control-Allow-Origin",reqs.getHeader("Origin"));
        response.setHeader("Access-Control-Allow-Origin","*");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, PATCH, DELETE, PUT");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
        chain.doFilter(req, res);
    }
 
    @Override
    public void init(FilterConfig filterConfig) {}
 
    @Override
    public void destroy() {}
 
}

写一个拦截器用于拦截没有登录的用户请求（判断session中有没有user）

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import com.mfc.entity.EtAdmin;

 
public class LoginInterceptor implements HandlerInterceptor {

	// 执行Handler方法之前执行
	// 用于身份认证、身份授权
	// 比如身份认证，如果认证通过表示当前用户没有登陆，需要此方法拦截不再向下执行
   //验证用户权限
	 
	@Override
	public boolean preHandle(HttpServletRequest request,
			HttpServletResponse response, Object handler) throws Exception {
		System.out.println("---"+request.getSession().getAttribute("user"));
		if(null == request.getSession().getAttribute("user")){
			return false;
		}
		return true; 

	}
 
	// 进入Handler方法之后，返回modelAndView之前执行
	// 应用场景从modelAndView出发：将公用的模型数据(比如菜单导航)在这里
	// 传到视图，也可以在这里统一指定视图
	@Override
	public void postHandle(HttpServletRequest request,
			HttpServletResponse response, Object handler,
			ModelAndView modelAndView) throws Exception {

	}

	// 执行Handler完成执行此方法
	// 应用场景：统一异常处理，统一日志处理
	@Override
	public void afterCompletion(HttpServletRequest request,
			HttpServletResponse response, Object handler, Exception ex)
			throws Exception {
	}
}

然后把这个拦截器注册（addPathPattern是添加过滤路径 excludePathPatterns是排除过滤路径也就是说/user下面的请求只有login可以不走拦截器其他的都会走）

import java.util.List;
import org.springframework.context.annotation.Configuration;
import org.springframework.format.FormatterRegistry;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.validation.MessageCodesResolver;
import org.springframework.validation.Validator;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.HandlerMethodReturnValueHandler;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.config.annotation.AsyncSupportConfigurer;
import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.PathMatchConfigurer;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.ViewResolverRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import com.mfc.Interceptor.LoginInterceptor;
 

@Configuration
public class WebappAdapter implements WebMvcConfigurer{
	
	/**
	 * 注册拦截器
	 */
	@Override
	public void addInterceptors(InterceptorRegistry registry) {
		registry.addInterceptor(new LoginInterceptor()).addPathPatterns("/user/**")
				.excludePathPatterns("/user/login");
	}

	@Override
	public void addArgumentResolvers(List<HandlerMethodArgumentResolver> arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void addCorsMappings(CorsRegistry arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void addFormatters(FormatterRegistry arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void addResourceHandlers(ResourceHandlerRegistry arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void addReturnValueHandlers(
			List<HandlerMethodReturnValueHandler> arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void addViewControllers(ViewControllerRegistry arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void configureAsyncSupport(AsyncSupportConfigurer arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void configureContentNegotiation(ContentNegotiationConfigurer arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void configureDefaultServletHandling(
			DefaultServletHandlerConfigurer arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void configureHandlerExceptionResolvers(
			List<HandlerExceptionResolver> arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void configureMessageConverters(List<HttpMessageConverter<?>> arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void configurePathMatch(PathMatchConfigurer arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void configureViewResolvers(ViewResolverRegistry arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void extendHandlerExceptionResolvers(
			List<HandlerExceptionResolver> arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void extendMessageConverters(List<HttpMessageConverter<?>> arg0) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public MessageCodesResolver getMessageCodesResolver() {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public Validator getValidator() {
		// TODO Auto-generated method stub
		return null;
	}

}

VUE中需要简单配置一下axios(后面可以吧axios封装起来我这项目比较小就暂时没有封装)
在main.js中配置并引用axios(当请求后台被拦截的话就跳转到登录页面)

import VueAxios from 'vue-axios'
import axios from 'axios'

Vue.use(VueAxios, axios)
axios.defaults.baseURL = 'http://localhost:8099'
axios.defaults.withCredentials=true;//请求发送cookie
// 添加请求拦截器
axios.interceptors.request.use(function (config) {
	// 在发送请求之前做些什么
	console.log('in interceptor, request config: ', config);
    return config;
  }, function (error) {
    // 对请求错误做些什么
    return Promise.reject(error);
  });
// 添加响应拦截器
axios.interceptors.response.use(function (response) {
	// 对响应数据做点什么
	console.log('in interceptor, response: ', response);
	if(!response.data.success){
		console.log('errCode:', response.data.errCode, 'errMsg:', response.data.errMsg);
		let code = response.data.errCode;
    console.log("reposne  ",response)
		if('login02'==code){ //登录session失效
			//window.location.href = '/';
			console.log('before to login, current route path:', router.currentRoute.path);
			router.push({path:'/login'});
		}
	}
	return response;
  }, function (error) {
    // 对响应错误做点什么
		console.log('in interceptor, error: ', error);
    router.push({path:'/login'});
    return Promise.reject(error);
  });

登录的话就写了一个简易的请求

const loading = this.$loading({
        lock: true,
        text: "登录中",
        spinner: "el-icon-loading",
        background: "rgba(0, 0, 0, 0.7)",
      });
      that.axios.get("/user/login?stu_no="+this.username+"&upass="+this.password).then(res=>{
        console.log(res)
        if(res.data.status == 0){
          this.$message(res.data.msg)
          loading.close();
        }else{
          loading.close();
          sessionStorage.setItem("userId",res.data.stu.id)
          sessionStorage.setItem("realname",res.data.stu.realname)
            that.$router.replace("Home");
        }