寫一個Apache文件上傳與文件下載的案例：以供今后學習
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_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> <!-- 上傳配置 --> <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>文件上傳</title> </head> <body> <!-- ${pageContext.request.contextPath} : 作用是取出部署的應用程序名 缺點:操作不便，其他工具無法正確解釋${pageContext.request.contextPath} 如果Servlet的配置路徑為 /upload/uploadHandleServlet action跳轉路徑為: ${pageContext.request.contextPath}/upload/uploadHandleServlet 上傳文件時,必須 1.enctype="multipart/form-data" 2.method=post --> <form action="${pageContext.request.contextPath}/upload/uploadHandleServlet" enctype="multipart/form-data" method="post"> 上傳用戶：<input type="text" name="username"><br/> 上傳文件1：<input type="file" name="file1"><br/> 上傳文件2：<input type="file" name="file2"><br/> <input type="submit" value="提交"> </form> </body> </html></span>
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