Struts2文件上传下载

来源：互联网发布：职场英语知乎编辑：程序博客网时间：2024/04/29 16:53

先看下文件结构

下面是源码及其相关注释

package com;import java.io.File;import java.io.InputStream;import java.io.UnsupportedEncodingException;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;public class DownLoadAction extends ActionSupport {private static final long serialVersionUID = 1L;private String savePath = "file//";//文件上传的路径private String fileFileName;private File file;private String fileContentType;public String getFileName() {return fileFileName;}public void setFileName(String fileName) {this.fileFileName = fileName;}public File getFile() {return file;}public void setFile(File file) {this.file = file;}public String getFileContentType() {return fileContentType;}public void setFileContentType(String fileContentType) {this.fileContentType = fileContentType;}public String getFileFileName() {return fileFileName;}public void setFileFileName(String fileFileName) {this.fileFileName = fileFileName;}public String getSavePath() {return savePath;}public void setSavePath(String savePath) {this.savePath = savePath;}@Overridepublic String execute() throws Exception {fileFileName = ServletActionContext.getRequest().getParameter("fileName");return SUCCESS;}// 从下载文件原始存放路径读取得到文件输出流public InputStream getDownloadFile() throws UnsupportedEncodingException {fileFileName = new String(fileFileName.getBytes("ISO8859-1"), "UTF-8");System.out.println("fileFileName:Down:"+fileFileName);return ServletActionContext.getServletContext().getResourceAsStream(savePath + fileFileName);}// 如果下载文件名为中文，进行字符编码转换public String getDownloadChineseFileName() {String downloadChineseFileName = fileFileName;try {downloadChineseFileName = new String(downloadChineseFileName.getBytes(), "ISO8859-1");} catch (UnsupportedEncodingException e) {e.printStackTrace();}return downloadChineseFileName;} }

package com;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;public class UploadAction extends ActionSupport {private static final long serialVersionUID = 1L;private File[] uploadFile;//上传的文件名private String[] contentType;private String[] caption;private String[] uploadFilename;public String[] getCaption() {return caption;}public void setCaption(String[] caption) {this.caption = caption;}public String[] getContentType() {return contentType;}public void setUploadFileContentType(String[] contentType) {this.contentType = contentType;}public File[] getUploadFile() {return uploadFile;}public void setUploadFile(File[] uploadFile) {this.uploadFile = uploadFile;}public String[] getUploadFilename() {return uploadFilename;}public void setUploadFileFileName(String[] uploadFilename) {this.uploadFilename = uploadFilename; }/** * 拷贝文件到相应的目录下 * @param src * @param dst */private static void copy(File src, File dst) {try {InputStream in = null;OutputStream out = null;try {in = new BufferedInputStream(new FileInputStream(src));out = new BufferedOutputStream(new FileOutputStream(dst));byte[] buffer = new byte[16 * 1024];while (in.read(buffer) > 0) {out.write(buffer);}} finally {if (null != in) {in.close();}if (null != out) {out.close();}}} catch (Exception e) {e.printStackTrace();}}@Overridepublic String execute() {for (int i = 0; i < this.getUploadFile().length; i++) {File imageFile = null;imageFile = new File(ServletActionContext.getServletContext().getRealPath("/")+ "file/" + new String(uploadFilename[i]));copy(this.getUploadFile()[i], imageFile);}return SUCCESS;}}

<?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.i18n.encoding" value="GBK" /><constant name="struts.ui.theme" value="simple" /><constant name="struts.ui.templateDir" value="template" /><constant name="struts.ui.templateSuffix" value="ftl" /><package name="uploadFile" extends="struts-default"><action name="myUpload" class="com.UploadAction"><interceptor-ref name="fileUpload"><param name="savePath">/file</param><param name="maximumSize">1024000</param></interceptor-ref><interceptor-ref name="defaultStack" /><result name="input">/index.jsp</result><result name="success">/showUpload.jsp</result></action><action name="download" class="com.DownLoadAction"><param name="fileName"></param><result name="success" type="stream"><param name="contentType">application/octet-stream</param><param name="contentDisposition">attachment;filename="${downloadChineseFileName}"</param><param name="inputName">downloadFile</param><param name="bufferSize">4096</param></result></action></package></struts>

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"><filter><filter-name>struts2</filter-name><filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class></filter><filter> <filter-name>struts-cleanup</filter-name> <filter-class> org.apache.struts2.dispatcher.ActionContextCleanUp </filter-class> </filter> <filter-mapping><filter-name>struts-cleanup</filter-name><url-pattern>/*</url-pattern></filter-mapping> <filter-mapping><filter-name>struts2</filter-name><url-pattern>/*</url-pattern></filter-mapping><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><context-param><param-name>contextConfigLocation</param-name><param-value>/WEB-INF/applicationContext*.xml</param-value></context-param><filter><filter-name>encodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param></filter><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><welcome-file-list><welcome-file>index.jsp</welcome-file></welcome-file-list></web-app>

index.jsp

<%@ page language="java" contentType="text/html;charset=gb2312"%><%@ taglib prefix="s" uri="/struts-tags"%><! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" ><html xmlns="http://www.w3.org/1999/xhtml"><head><title>upload file</title><mce:script type="text/javascript"></mce:script></head><body><s:fielderror /><s:form method="post" name="uploadForm" action="myUpload.action" enctype="multipart/form-data" onsubmit="return check();" theme="simple"> <tr> <td id="more">选择文件:<input type="file" name="uploadFile" />文件资源描述:<input type="text" name="caption" size="35" /><input type="button" value="添加" onclick="addMore()" /></td> </tr> <tr> <td align="center"><s:submit value="上传" /> <s:reset value="重置" /></td> </tr> </s:form></body></html>

showUpload.jsp

<%@ page language="java" contentType="text/html;charset=UTF-8"%><%@ taglib prefix="s" uri="/struts-tags"%><! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" ><html xmlns="http://www.w3.org/1999/xhtml"><head><title>查看上传文件</title></head><body><center><table border="1"><s:iterator value="uploadFilename" status="stat"><tr><td><s:property value="%{uploadFilename[#stat.index]}" /><br /></td><a href="download.action?fileName=<s:property value=" mce_href="download.action?fileName=<s:property value="%{uploadFilename[#stat.index]}" ></a>">下载</a></tr><tr><td><s:property value="%{caption[#stat.index]}" /></td></tr></s:iterator></table></center></body></html>

看了上面的就可以做一个上传下载的了，这里只是简单贴下代码