Struts2上传/下载文件
Action->
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import java.io.BufferedInputStream;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import org.apache.commons.io.FileUtils;import org.apache.struts2.convention.annotation.Action;import org.apache.struts2.convention.annotation.ParentPackage;import org.apache.struts2.convention.annotation.Result;import org.apache.struts2.convention.annotation.Results;import org.slf4j.Logger;import org.slf4j.LoggerFactory;@ParentPackage("service-default")@Results({ @Result(name = "list", location = "/pages/file/upload.jsp") })public class UploadAction extends BaseAction {private static final long serialVersionUID = 4885233632866196355L;private final static Logger log = LoggerFactory.getLogger(UploadAction.class);private String downpath;private String fileName;private File file;private String[] files;InputStream fileInputStream = null;@Action("file_index")public String list() throws Exception {String uploadPath = context.getRealPath(File.separator + "upload");File destDir = new File(uploadPath);if (destDir.exists() && destDir.isDirectory()) {files = destDir.list();}return "list";}@Action("file_upload")public String file_upload() throws Exception {File srcFile = getFile();String temp[] = getFileName().replaceAll("\\\\", "/").split("/");if (temp.length > 1) {setFileName(temp[temp.length - 1]);}String destFile = context.getRealPath(File.separator + "upload") + File.separator + getFileName();FileUtils.copyFile(srcFile, new File(destFile));log.debug("save to >" + destFile);return list();}@Action("file_remove")public String file_remove() throws Exception {String filePath = context.getRealPath(File.separator + "upload") + File.separator + getFileName();File file = new File(filePath);if (file.exists() && file.isFile()) {file.delete();}return list();}@Action("file_download")public String file_download() throws Exception {String filePath = context.getRealPath(File.separator + "upload") + File.separator + getFileName();File file = new File(filePath);if (file.exists() && file.isFile()) {setFileName(file.getName());fileInputStream = new BufferedInputStream(new FileInputStream(file));}return "download";}public String getFileName() {return fileName;}public void setFileName(String fileName) {this.fileName = fileName;}public File getFile() {return file;}public void setFile(File file) {this.file = file;}public String[] getFiles() {return files;}public void setFiles(String[] files) {this.files = files;}public InputStream getFileInputStream() {return fileInputStream;}public void setFileInputStream(InputStream fileInputStream) {this.fileInputStream = fileInputStream;}public String getDownpath() {downpath = context.getContextPath() + "/file_download?fileName=";return downpath;}public void setDownpath(String downpath) {this.downpath = downpath;}}?
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struts.xml
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<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"><struts><constant name="struts.devMode" value="true" /><constant name="struts.action.extension" value="" /><constant name="struts.configuration.xml.reload" value="true" /><constant name="struts.multipart.maxSize" value="102400000" /><constant name="struts.i18n.encoding" value="utf-8" /><constant name="struts.objectFactory" value="org.apache.struts2.spring.StrutsSpringObjectFactory" /><package name="service-default" extends="struts-default"><global-results><result name="error">/pages/error.jsp</result><result name="download" type="stream"><param name="contentType">application/octet-stream</param><param name="contentDisposition">attachment;filename="${fileName}"</param><param name="inputName">fileInputStream</param></result></global-results><global-exception-mappings><exception-mapping result="error" exception="java.lang.Exception"></exception-mapping></global-exception-mappings></package></struts> ?
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Pages
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<%@ page contentType="text/html; charset=utf-8" pageEncoding="utf-8"%><%@taglib prefix="s" uri="/struts-tags"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>文件上传示例</title><script type="text/javascript">function remove(fileName) {var url="<%=request.getContextPath()%>/file_remove?fileName="+fileName;window.document.location = url;}function download(fileName) {var url="<%=request.getContextPath()%>/file_download?fileName="+ fileName;window.document.location = url;}function change(o) {document.getElementsByName("fileName")[0].value=o.value;}function index() {var url="<%=request.getContextPath()%>/file_index";window.document.location = url;}</script></head><body><table border="1" cellpadding="2" cellspacing="5"><tr><td align="center">ID</td><td align="center"><a href="#" onclick="index()">INDEX</a></td><td align="center">Func</td></tr><s:iterator value="files" status="st"><tr><td><s:property value="#st.index+1" /></td><td><div><s:property value="downpath" /><s:property /></div></td><td><a href="#" onclick="remove('<s:property />')">remove</a> <a href="#" onclick="download('<s:property />')">download</a></td></tr></s:iterator></table><br><s:form name="myform" action="/file_upload" method="POST" enctype="multipart/form-data"><s:hidden name="fileName" /> <td> <input type="file" name="file" value="" id="file_upload_file" onchange="change(this)"/> <input type="submit" value="上传"/> </td></s:form></body></html>?