Apache 文件上传与文件下载案例详解

2019-11-02 15:09:00

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写一个Apache文件上传与文件下载的案例：以供今后学习

web.xml配置如下：

<span style="font-family:SimSun;font-size:14px;"><?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_最新综艺[www.aikan.tv/xzhtml/6/]
2_5.xsd" version="2.5">  <display-name>FileUploadAndDownload</display-name>  <welcome-file-list>   <welcome-file>index.html</welcome-file>   <welcome-file>index.htm</welcome-file>   <welcome-file>index.jsp</welcome-file>   <welcome-file>default.html</welcome-file>   <welcome-file>default.htm</welcome-file>   <welcome-file>default.jsp</welcome-file>  </welcome-file-list>   <!-- 上传配置 -->   <servlet>     <servlet-name>uploadHandleServlet</servlet-name>     <servlet-class>com.zeng.controller.UploadHandleServlet</servlet-class>   </servlet>    <servlet-mapping>     <servlet-name>uploadHandleServlet</servlet-name>     <url-pattern>/upload/uploadHandleServlet</url-pattern>   </servlet-mapping>   <servlet>     <servlet-name>listFileServlet</servlet-name>     <servlet-class>com.zeng.controller.ListFileServlet</servlet-class>   </servlet>    <servlet-mapping>     <servlet-name>listFileServlet</servlet-name>     <url-pattern>/listFileServlet</url-pattern>   </servlet-mapping>   <servlet>     <servlet-name>downLoadServlet</servlet-name>     <servlet-class>com.zeng.controller.DownLoadServlet</servlet-class>   </servlet>    <servlet-mapping>     <servlet-name>downLoadServlet</servlet-name>     <url-pattern>/download/downLoadServlet</url-pattern>   </servlet-mapping> </web-app></span>

2.upload.jsp文件

<span style="font-family:SimSun;font-size:14px;"><%@page language="java" pageEncoding="UTF-8"%> <!DOCTYPE HTML> <html>  <head>   <title>文件上传</title>  </head>    <body>  <!--    ${pageContext.request.contextPath} : 作用是取出部署的应用程序名   缺点:操作不便，其他工具无法正确解释${pageContext.request.contextPath}       如果Servlet的配置路径为 /upload/uploadHandleServlet   action跳转路径为:    ${pageContext.request.contextPath}/upload/uploadHandleServlet      上传文件时,必须   1.enctype="multipart/form-data"   2.method=post   -->   <form action="${pageContext.request.contextPath}/upload/uploadHandleServlet" enctype="multipart/form-data" method="post">     上传用户：<input type="text" name="username"><br/>     上传文件1：<input type="file" name="file1"><br/>     上传文件2：<input type="file" name="file2"><br/>     <input type="submit" value="提交">   </form>  </body> </html></span>

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