Struts2(多)文件上传和下载使用示例

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/** * Struts2Test * 使用Struts2上传文件 */package com.labci.struts2.action;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.util.ArrayList;import java.util.Arrays;import java.util.List;import javax.servlet.http.HttpServletRequest;import org.apache.struts2.interceptor.ServletRequestAware;import com.opensymphony.xwork2.ActionSupport;/** * @author Bill Tu(tujiyue/iwtxokhtd) * Jun 8, 2011[8:31:01 PM] * */public class UploadFileAction extends ActionSupport implementsServletRequestAware {/** * */private static final long serialVersionUID = -1896915260152387341L;private HttpServletRequest request;public void setServletRequest(HttpServletRequest req) {this.request=req;}private List<File> fileName;//这里的"fileName"一定要与表单中的文件域名相同private List<String> fileNameContentType;//格式同上"fileName"+ContentTypeprivate List<String> fileNameFileName;//格式同上"fileName"+FileNameprivate String savePath;//文件上传后保存的路径private String allowTypes;//允许上传的文件类型public List<File> getFileName() {return fileName;}public void setFileName(List<File> fileName) {this.fileName = fileName;}public List<String> getFileNameContentType() {return fileNameContentType;}public void setFileNameContentType(List<String> fileNameContentType) {this.fileNameContentType = fileNameContentType;}public List<String> getFileNameFileName() {return fileNameFileName;}public void setFileNameFileName(List<String> fileNameFileName) {this.fileNameFileName = fileNameFileName;}@SuppressWarnings("deprecation")public String getSavePath() {return request.getRealPath(savePath);}public void setSavePath(String savePath) {this.savePath = savePath;}public String getAllowTypes() {return allowTypes;}public void setAllowTypes(String allowTypes) {this.allowTypes = allowTypes;}@Overridepublic String execute() throws Exception {//得到文件的类型List<String> fileTypes=getFileNameContentType();String []allowTypes=getAllowTypes().split(",");List<String> typesList=Arrays.asList(allowTypes);boolean allowFlag=true;//是否存在不允许上传的文件类型for(String type:fileTypes){if(!typesList.contains(type)){allowFlag=false;break;}}if(!allowFlag){request.setAttribute("fileTypeError", "您上传的文件中存在不允许上传的类型,允许上传的类型为："+getAllowTypes());return INPUT;}//允许上传File dir=new File(getSavePath());if(!dir.exists()){dir.mkdirs();}List<File> files=getFileName();for(int i=0;i<files.size();i++){FileOutputStream fos=new FileOutputStream(getSavePath()+"//"+getFileNameFileName().get(i));FileInputStream fis=new FileInputStream(getFileName().get(i));byte []buffers=new byte[1024];int len=0;while((len=fis.read(buffers))!=-1){fos.write(buffers,0,len);}}List<String> fileHrefsList=new ArrayList<String>();for(String fileName:getFileNameFileName()){String href="<a href="/" mce_href="/""downloadFile.action?fileName="+fileName+"/">"+fileName+"</a>";fileHrefsList.add(href);}request.setAttribute("fileNameList", fileHrefsList);return SUCCESS;}}

<%@ page language="java" contentType="text/html;charset=utf-8" pageEncoding="utf-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>Struts2多文件上传</title> </head> <body> <table><tr><td><c:choose><c:when test="${!empty fileTypeError}"><font color="red"><b>${fileTypeError}</b></font></c:when><c:otherwise><c:forEach items="${fileNameList}" var="fileName">${fileName}<br/></c:forEach></c:otherwise></c:choose></td></tr> </table>  <form action="uploadFile.action" method="post" enctype="multipart/form-data"> <input type="file" name="fileName"/><br/> <input type="file" name="fileName"/><br/> <input type="file" name="fileName"/><br/> <input type="submit" value="上传"/> </form> </body></html>

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"><filter><filter-name>struts2</filter-name><filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class></filter><filter-mapping><filter-name>struts2</filter-name><url-pattern>*.action</url-pattern></filter-mapping><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"><struts> <constant name="struts.devMode" value="false" />  <constant name="struts.multipart.maxSize" value="10240000"/> <package name="upload" extends="struts-default"> <action name="uploadFile" class="com.labci.struts2.action.UploadFileAction"> <param name="savePath">/upload</param> <param name="allowTypes">text/plain,text/xml,text/html,image/gif,image/png,image/jpeg,image/jpg,image/bmp</param> <result name="success">index.jsp</result> <result name="input">index.jsp</result> </action> <action name="downloadFile" class="com.labci.struts2.action.DownloadFileAction"> <param name="savePath">/upload</param> <result name="success">index.jsp</result> </action> </package></struts>

/** * Struts2Test * 文件下载的Action */package com.labci.struts2.action;import java.io.FileInputStream;import java.io.InputStream;import java.io.OutputStream;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts2.interceptor.ServletRequestAware;import org.apache.struts2.interceptor.ServletResponseAware;import com.opensymphony.xwork2.ActionSupport;/** * @author Bill Tu(tujiyue/iwtxokhtd) * Jun 8, 2011[9:15:15 PM] * */public class DownloadFileAction extends ActionSupport implementsServletRequestAware, ServletResponseAware {/** * */private static final long serialVersionUID = -7448748577778248376L;private HttpServletRequest request;private HttpServletResponse response;private String savePath;@Overridepublic String execute() throws Exception {String fileName=request.getParameter("fileName");String fullPath=getSavePath()+"//"+fileName;fileName=new String(fileName.getBytes("utf-8"),"iso-8859-1");InputStream is=new FileInputStream(fullPath);int len=0;byte []buffers=new byte[1024];response.reset();response.setContentType("application/x-msdownload");response.addHeader("Content-Disposition", "attachment;filename=/""+fileName+"/"");//把文件内容通过输出流打印到页面上供下载while((len=is.read(buffers))!=-1){OutputStream os=response.getOutputStream();os.write(buffers, 0, len);}is.close();return SUCCESS;}public void setServletRequest(HttpServletRequest req) {this.request=req;}public void setServletResponse(HttpServletResponse resp) {this.response=resp;}@SuppressWarnings("deprecation")public String getSavePath() {return request.getRealPath(savePath);}public void setSavePath(String savePath) {this.savePath = savePath;}}