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Filter_细节_过滤器拦截路径配置
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過濾器配置詳解
?? ?* 攔截路徑配置：
?? ??? ?1. 具體資源路徑： /index.jsp ? 只有訪問index.jsp資源時，過濾器才會被執(zhí)行
?? ??? ?2. 攔截目錄： /user/*?? ?訪問/user下的所有資源時，過濾器都會被執(zhí)行
?? ??? ?3. 后綴名攔截： *.jsp?? ??? ?訪問所有后綴名為jsp資源時，過濾器都會被執(zhí)行
?? ??? ?4. 攔截所有資源：/*?? ??? ?訪問所有資源時，過濾器都會被執(zhí)行
?
<%--Created by IntelliJ IDEA.User: leonDate: 2019/11/24Time: 11:30To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html><head><title>$Title$</title></head><body>hello.jsp....</body>
</html>
package com.learn.web.filter;import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;//@WebFilter("/index.jsp") // 1. 具體資源路徑： /index.jsp 只有訪問index.jsp資源時，過濾器才會被執(zhí)行
//@WebFilter("/user/*") // 2. 攔截目錄： /user/* 訪問/user下的所有資源時，過濾器都會被執(zhí)行
@WebFilter("*.jsp")
public class FilterDemo4 implements Filter {@Overridepublic void init(FilterConfig filterConfig) throws ServletException {}@Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,FilterChain filterChain) throws IOException, ServletException {System.out.println("filterDemo4....");filterChain.doFilter(servletRequest, servletResponse);}@Overridepublic void destroy() {}
}
package com.learn.web.servlet;import javax.servlet.*;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;@WebServlet("/user/findAllServlet")
public class ServletDemo1 extends HttpServlet {@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {this.doPost(req,resp);}@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {System.out.println("findAllServlet...");}
}
package com.learn.web.servlet;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;@WebServlet("/user/updateServlet")
public class ServletDemo2 extends HttpServlet {@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {this.doPost(req,resp);}@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {System.out.println("updateServlet...");}
}
?
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