spring boot登录拦截器的实现亲测有用

Posted 2023-03-02

参考技术A spring boot登录拦截器的实现

创建时间：2018年6月28日(星期四) 上午10:31

package

com.otc.demo.filter;

import org.springframework.web.servlet.HandlerInterceptor;

import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

public class MyInterceptorimplements HandlerInterceptor

@Override

    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o)throws Exception

HttpSession session = httpServletRequest.getSession();

String token = (String) session.getAttribute("token");//获取登录的session信息

        if(token!=null)

return true;



else

System.out.print("下面执行跳转到登录界面");

//httpServletResponse.sendRedirect(httpServletRequest.getContextPath()+"/login/index");  //未登录自动跳转界面

            return false;





//请求处理之后进行调用，但是在视图被渲染之前（Controller方法调用之后）

    @Override

    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView)throws Exception

System.out.println("postHandle被调用\n");



//在整个请求结束之后被调用，也就是在DispatcherServlet 渲染了对应的视图之后执行（主要是用于进行资源清理工作）

    @Override

    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e)throws Exception

System.out.println("afterCompletion被调用\n");





拦截和排除

package com.otc.demo.filter;

import org.springframework.context.annotation.Configuration;

import org.springframework.web.servlet.config.annotation.InterceptorRegistration;

import org.springframework.web.servlet.config.annotation.InterceptorRegistry;

import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration

public class WebMvcConfigimplements WebMvcConfigurer

@Override

    public void addInterceptors(InterceptorRegistry registry)

//addPathPattern后跟拦截地址，excludePathPatterns后跟排除拦截地址

        InterceptorRegistration interceptorRegistration = registry.addInterceptor(new MyInterceptor());

//不拦截的路径

        interceptorRegistration.excludePathPatterns("/user/login");

System.out.println("执行到此");

interceptorRegistration.excludePathPatterns("/user/register");

//拦截的路径

        interceptorRegistration.addPathPatterns("/**");