struts1上传文件（commons-fileupload）-优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_11205/article/details/82325159

jsp

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%
	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>
		<base href="<%=basePath%>">

		<title>My JSP 'index.jsp' starting page</title>
		<meta http-equiv="pragma" content="no-cache">
		<meta http-equiv="cache-control" content="no-cache">
		<meta http-equiv="expires" content="0">
		<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
		<meta http-equiv="description" content="This is my page">
		<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
	</head>

	<body>
		<form action="toUploadFile.do" method="post" enctype="multipart/form-data">
			<input type="file" name="file">
			<input type="submit" value="upload">
		</form>
		${fileName }
	</body>
</html>

struts-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>	
	<action-mappings>
		<action path="/toUploadFile"
        type="com.yqh.action.UploadAction"
        parameter="toUploadFile">
        	<forward name="uploadFile" path="/index.jsp"></forward>
        </action>
	</action-mappings>
</struts-config>

UploadAction

package com.yqh.action;

import java.io.File;
import java.util.Iterator;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.MappingDispatchAction;

/**
 *上传文件
 */
public class UploadAction extends MappingDispatchAction {
	
	private Log logger = LogFactory.getLog(UploadAction.class);
	
	public ActionForward toUploadFile(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		try {
			String fileName = uploadFile(request);
			
			if (fileName == null) {
				return mapping.findForward("InvalidFile");
			}
			request.setAttribute("fileName", fileName);
			logger.info(" 执行了上传文件操作");
			
		} catch (Exception e) {
			e.printStackTrace();
		}
		return mapping.findForward("uploadFile");
	}

	private String uploadFile(HttpServletRequest request) {
		String fileName = "";
		try {

			DiskFileItemFactory fc = new DiskFileItemFactory();
			// 设置文件的最大限度，如果超出这个限度，则将文件写入磁盘
			fc.setSizeThreshold(4000);
			// 文件超过最大限度时，写入磁盘的临时路径
			fc.setRepository(new File("c:\\tmp"));

			ServletFileUpload fu = new ServletFileUpload(fc);
			// 设置最大文件尺寸，单位为字节，这里是4MB
			fu.setSizeMax(10194304);
			
			// 得到所有的文件
			List fileItems = fu.parseRequest(request);
			Iterator i = fileItems.iterator();
			// 依次处理每一个文件
			while (i.hasNext()) {
				FileItem fi = (FileItem) i.next();
				//获得文件名，这个文件名包括路径
				fileName = fi.getName();
				//限制文件类型
//				if (!fileName.endsWith(".xls"))
//					return null;
				//限制文件大小
//				if (fi.getSize() > 10194304)
//					throw new RuntimeException("File is too large!");
				fileName = fileName.substring(fileName.lastIndexOf("\\") + 1,
						fileName.length());
				// 写入文件
				fi.write(new File("d:/upload/" + fileName));
				System.out.println(fileName + " upload success");
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return fileName;
	}
}

4.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">
<servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
   </servlet>



<servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
</web-app>

5.附件是所需要的jar包