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add filter

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landaiqing 2023-06-10 01:17:39 +08:00
parent 973c47b7fd
commit 309784868a
1 changed files with 48 additions and 48 deletions
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src/com/landaiqing/filter/UserSessionFilter.java
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@ -1,48 +1,48 @@
//package com.landaiqing.filter;
//
//
//import jakarta.servlet.*;
//import jakarta.servlet.annotation.WebFilter;
//import jakarta.servlet.http.HttpServletRequest;
//import jakarta.servlet.http.HttpServletResponse;
//import jakarta.servlet.http.HttpSession;
//
//import java.io.IOException;
//
///**
// * 过滤器
// */
//@WebFilter("/System/*")// 过滤器所有的请求
//public class UserSessionFilter implements Filter {
// private String[] excludeUrls = new String[]{"/login", "/publish","/reply","/VerifycodeServlet","/System/showAdmin"};
//
// @Override
// public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
// // 从session获取到用户的会话信息 判断用户是否登录过
// HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest;
// HttpServletResponse httpServletResponse = (HttpServletResponse) servletResponse;
// String contextPath = httpServletRequest.getContextPath();
// // 定义一个数组 哪些 请求是需要排除的
// for (int i = 0; i < excludeUrls.length; i++) {
// String excludeUrl = contextPath + excludeUrls[i];
// String requestURI = httpServletRequest.getRequestURI();
// if (excludeUrl.equals(requestURI)) {
// // 放行请求
// filterChain.doFilter(httpServletRequest, httpServletResponse);
// return;
// }
// }
// // 排除请求
// HttpSession session = httpServletRequest.getSession();
// Object user = session.getAttribute("user");
// if (user == null) {
// // 当前用户没有登录或者登录会话失效
// // 重定向到登录页面
// httpServletResponse.sendRedirect(contextPath+"/");
// return;
// }
// // 用户已经登录了 正常放行请求
// filterChain.doFilter(httpServletRequest, httpServletResponse);
// }
//}
//
package com.landaiqing.filter;
import jakarta.servlet.*;
import jakarta.servlet.annotation.WebFilter;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import java.io.IOException;
/**
* 过滤器
*/
@WebFilter("/System/*")// 过滤器所有的请求
public class UserSessionFilter implements Filter {
private String[] excludeUrls = new String[]{"/login", "/publish","/reply","/VerifycodeServlet"};
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
// 从session获取到用户的会话信息 判断用户是否登录过
HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest;
HttpServletResponse httpServletResponse = (HttpServletResponse) servletResponse;
String contextPath = httpServletRequest.getContextPath();
// 定义一个数组 哪些 请求是需要排除的
for (int i = 0; i < excludeUrls.length; i++) {
String excludeUrl = contextPath + excludeUrls[i];
String requestURI = httpServletRequest.getRequestURI();
if (excludeUrl.equals(requestURI)) {
// 放行请求
filterChain.doFilter(httpServletRequest, httpServletResponse);
return;
}
}
// 排除请求
HttpSession session = httpServletRequest.getSession();
Object user = session.getAttribute("user");
if (user == null) {
// 当前用户没有登录或者登录会话失效
// 重定向到登录页面
httpServletResponse.sendRedirect(contextPath+"/");
return;
}
// 用户已经登录了 正常放行请求
filterChain.doFilter(httpServletRequest, httpServletResponse);
}
}