add filter
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//package com.landaiqing.filter;
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package com.landaiqing.filter;
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//
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//
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//import jakarta.servlet.*;
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import jakarta.servlet.*;
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//import jakarta.servlet.annotation.WebFilter;
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import jakarta.servlet.annotation.WebFilter;
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//import jakarta.servlet.http.HttpServletRequest;
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import jakarta.servlet.http.HttpServletRequest;
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//import jakarta.servlet.http.HttpServletResponse;
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import jakarta.servlet.http.HttpServletResponse;
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//import jakarta.servlet.http.HttpSession;
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import jakarta.servlet.http.HttpSession;
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//
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//import java.io.IOException;
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import java.io.IOException;
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//
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///**
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/**
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// * 过滤器
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* 过滤器
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// */
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*/
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//@WebFilter("/System/*")// 过滤器所有的请求
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@WebFilter("/System/*")// 过滤器所有的请求
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//public class UserSessionFilter implements Filter {
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public class UserSessionFilter implements Filter {
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// private String[] excludeUrls = new String[]{"/login", "/publish","/reply","/VerifycodeServlet","/System/showAdmin"};
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private String[] excludeUrls = new String[]{"/login", "/publish","/reply","/VerifycodeServlet"};
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//
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// @Override
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@Override
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// public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
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public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
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// // 从session获取到用户的会话信息 判断用户是否登录过
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// 从session获取到用户的会话信息 判断用户是否登录过
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// HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest;
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HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest;
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// HttpServletResponse httpServletResponse = (HttpServletResponse) servletResponse;
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HttpServletResponse httpServletResponse = (HttpServletResponse) servletResponse;
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// String contextPath = httpServletRequest.getContextPath();
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String contextPath = httpServletRequest.getContextPath();
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// // 定义一个数组 哪些 请求是需要排除的
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// 定义一个数组 哪些 请求是需要排除的
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// for (int i = 0; i < excludeUrls.length; i++) {
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for (int i = 0; i < excludeUrls.length; i++) {
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// String excludeUrl = contextPath + excludeUrls[i];
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String excludeUrl = contextPath + excludeUrls[i];
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// String requestURI = httpServletRequest.getRequestURI();
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String requestURI = httpServletRequest.getRequestURI();
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// if (excludeUrl.equals(requestURI)) {
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if (excludeUrl.equals(requestURI)) {
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// // 放行请求
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// 放行请求
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// filterChain.doFilter(httpServletRequest, httpServletResponse);
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filterChain.doFilter(httpServletRequest, httpServletResponse);
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// return;
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return;
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// }
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}
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// }
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}
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// // 排除请求
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// 排除请求
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// HttpSession session = httpServletRequest.getSession();
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HttpSession session = httpServletRequest.getSession();
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// Object user = session.getAttribute("user");
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Object user = session.getAttribute("user");
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// if (user == null) {
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if (user == null) {
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// // 当前用户没有登录或者登录会话失效
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// 当前用户没有登录或者登录会话失效
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// // 重定向到登录页面
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// 重定向到登录页面
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// httpServletResponse.sendRedirect(contextPath+"/");
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httpServletResponse.sendRedirect(contextPath+"/");
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// return;
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return;
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// }
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}
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// // 用户已经登录了 正常放行请求
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// 用户已经登录了 正常放行请求
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// filterChain.doFilter(httpServletRequest, httpServletResponse);
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filterChain.doFilter(httpServletRequest, httpServletResponse);
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// }
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}
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//}
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}
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//
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