Servlet路径跳转

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博客分类：

java

Servlet

一绝对路径：放之四海而皆准的路径。

二相对路径：相对于当前资源的路径。

三代码

1、index.jsp

<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%>

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>My JSP 'index.jsp' starting page</title>

<!--

-->

</head>

<body>

<h1>Servlet路径跳转</h1>

<hr>

<a href="servlet/HelloServlet">使用相对路径访问HelloServlet!</a><br>

<a href="<%=path%>/servlet/HelloServlet">使用绝对路径访问HelloServlet!</a><br>

<a href="servlet/TestServlet">访问TestServlet,跳转到Test.jsp</a>

</body>

</html>

2、web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.5"

xmlns="http://java.sun.com/xml/ns/javaee";

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd";>

<display-name></display-name>

<description>This is the description of my J2EE component</description>

<display-name>This is the display name of my J2EE component</display-name>

<servlet-name>HelloServlet</servlet-name>

<servlet-class>servlet.HelloServlet</servlet-class>

</servlet>

<description>This is the description of my J2EE component</description>

<display-name>This is the display name of my J2EE component</display-name>

<servlet-name>TestServlet</servlet-name>

<servlet-class>servlet.TestServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>HelloServlet</servlet-name>

<url-pattern>/servlet/HelloServlet</url-pattern>

</servlet-mapping>

<servlet-mapping>

<servlet-name>TestServlet</servlet-name>

<url-pattern>/servlet/TestServlet</url-pattern>

</servlet-mapping>

<welcome-file-list>

<welcome-file>index.jsp</welcome-file>

</welcome-file-list>

</web-app>

3、TestServlet.java

package servlet;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class TestServlet extends HttpServlet {

/**

* Constructor of the object.

public TestServlet() {

super();

}

/**

* Destruction of the servlet. <br>

public void destroy() {

super.destroy(); // Just puts "destroy" string in log

// Put your code here

}

/**

* The doGet method of the servlet. <br>

* This method is called when a form has its tag value method equals to get.

* @param request the request send by the client to the server

* @param response the response send by the server to the client

* @throws ServletException if an error occurred

* @throws IOException if an error occurred

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

doPost(request,response);

}

/**

* The doPost method of the servlet. <br>

* This method is called when a form has its tag value method equals to post.

* @param request the request send by the client to the server

* @param response the response send by the server to the client

* @throws ServletException if an error occurred

* @throws IOException if an error occurred

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

//请求重定向方式跳转到test.jsp,当前路径是ServletPathDirection/servlet/，所有下面这句不对

//response.sendRedirect("test.jsp");

//使用request.getContextPath获得上下文对象

//response.sendRedirect(request.getContextPath()+"/test.jsp");

//服务器内部跳转,这里的斜线表示项目的根目录

//request.getRequestDispatcher("/test.jsp").forward(request, response);

request.getRequestDispatcher("../test.jsp").forward(request, response);

}

/**

* Initialization of the servlet. <br>

* @throws ServletException if an error occurs

public void init() throws ServletException {

// Put your code here

}

四测试

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Java遍历目录 | Servlet获取表单数据

2017-10-14 09:01
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