Struts2 多文件上传下载

欢迎技术交流。 QQ：138986722 

最近在学习IO包、才看了几个类跟接口、就急匆匆的想在web上实现一下：

 

web.xml配置:

<?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"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <filter> <filter-name>struts2</filter-name> <filter-class> org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter </filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>*.action</url-pattern> </filter-mapping> </web-app>

 

struts.xml配置:

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"> <struts> <constant name="struts.i18n.encoding" value="utf-8" /> <package name="file" extends="struts-default"> <action name="showUpload"> <result>/upload.jsp</result> </action> <action name="upload" class="com.boxun.hzw.action.UploadAction"> <result name="input">/upload.jsp</result> <result>/download.jsp</result> <interceptor-ref name="fileUpload"> <param name="maximumSize">2097152</param> <param name="addowedTypes">image/bmp,image/jpg</param> </interceptor-ref> <interceptor-ref name="defaultStack"></interceptor-ref> </action> <action name="download" class="com.boxun.hzw.action.DownloadAction"> <result name="success" type="stream"> <param name="contentDisposition">attachment;filename="${fileName}"</param> <param name="inputName">downloadFile</param> </result> </action> </package> </struts>

 

后台实体类代码：

package com.boxun.hzw.bean; public class UploadFiles { private String uploadContentType; private String uploadFileName; private String uploadRealName; public String getUploadContentType() { return uploadContentType; } public void setUploadContentType(String uploadContentType) { this.uploadContentType = uploadContentType; } public String getUploadFileName() { return uploadFileName; } public void setUploadFileName(String uploadFileName) { this.uploadFileName = uploadFileName; } public String getUploadRealName() { return uploadRealName; } public void setUploadRealName(String uploadRealName) { this.uploadRealName = uploadRealName; } }

 

 

上传Action类：

package com.boxun.hzw.action; import java.io.*; import java.util.ArrayList; import java.util.List; import java.util.UUID; import org.apache.commons.io.FileUtils; import org.apache.struts2.ServletActionContext; import com.boxun.hzw.bean.UploadFiles; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; @SuppressWarnings("all") public class UploadAction extends ActionSupport { private static final long serialVersionUID = 1L; private File[] upload; //实际上传文件 private String[] uploadContentType; //文件的内容类型 private String[] uploadFileName; //上传文件名 private List<UploadFiles> uploadFiles = new ArrayList<UploadFiles>(); public String execute(){ String targetDirectory = ServletActionContext.getServletContext().getRealPath("/"+"images/");//获得路径 for(int i = 0 ; i < upload.length ; i++){ String fileName = uploadFileName[i]; //上传的文件名 String type = uploadContentType[i]; //文件类型 String realName = UUID.randomUUID().toString() + getExt(fileName); //保存的文件名称、使用UUID+后缀进行保存 File target = new File(targetDirectory,realName); try { FileUtils.copyFile(upload[i],target);//上传至服务器的目录 } catch (IOException e) { e.printStackTrace(); return INPUT; } //把路径()写入数据库 ---省略--- UploadFiles uf = new UploadFiles(); //创建文件 uf.setUploadContentType(type); uf.setUploadFileName(fileName); uf.setUploadRealName(realName); uploadFiles.add(uf); //添加到需要下载文件的List集合中 } ServletActionContext.getRequest().setAttribute("uploadFiles", uploadFiles); return SUCCESS; } public File[] getUpload() { return upload; } public void setUpload(File[] upload) { this.upload = upload; } public String[] getUploadContentType() { return uploadContentType; } public void setUploadContentType(String[] uploadContentType) { this.uploadContentType = uploadContentType; } public String[] getUploadFileName() { return uploadFileName; } public void setUploadFileName(String[] uploadFileName) { this.uploadFileName = uploadFileName; } public List<UploadFiles> getUploadFiles() { return uploadFiles; } public void setUploadFiles(List<UploadFiles> uploadFiles) { this.uploadFiles = uploadFiles; } public static long getSerialversionuid() { return serialVersionUID; } public static String getExt(String fileName){ return fileName.substring(fileName.lastIndexOf(".")); } }

 

下载Action类：

package com.boxun.hzw.action; import java.io.InputStream; import java.io.UnsupportedEncodingException; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; @SuppressWarnings("all") public class DownloadAction extends ActionSupport { private static final long serialVersionUID = 6329383258366253255L; private String fileName; private String fileRealName; public void setFileName(){ //得到请求下载的文件名 String fname = ServletActionContext.getRequest().getParameter("name"); String frealname = ServletActionContext.getRequest().getParameter("realname"); try { /* * 对fname参数进行utf-8解码、注意：实际进行utf-8解码时会使用本地编码、本机为GBK。 * 这里使用reqeust.setCharacterEncoding解码无效. * 只有解码了getDownloadFile()方法才能在下载目录下正确找到请求的文件 */ fname = new String(fname.getBytes("ISO-8859-1"),"utf-8"); frealname = new String(frealname.getBytes("ISO-8859-1"),"utf-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } this.fileName = fname; this.fileRealName = frealname; } /* * @getFileName 此方法对应的是struts.xml文件中的: * <param name ="contentDisposition"> attachment;filename="${fileName}"</param> * 这个属性设置的是下载工具下载文件时显示的文件名、要想正确的显示中文文件名， * 我们需要对fileName再次编码 * 否则中文名文件将出现乱码、或无法下载情况 * @return */ public String getFileName(){ try { fileRealName = new String (fileRealName.getBytes(),"ISO-8859-1"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return fileRealName; } /* * @getDownloadFile 此方法对应的是Struts.xml文件中的： * <param name="inputName">downloadFile</param> * 返回下载文件的流、可以参看Struts2的源码 */ public InputStream getDownloadFile(){ this.setFileName(); return ServletActionContext.getServletContext().getResourceAsStream("/"+"images/"+fileRealName); } @Override public String execute() throws Exception{ return SUCCESS; } }

 

上传jsp页面：

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% 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 'upload.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" mce_href="styles.css"> --> </head> <body> <form action="upload.action" method="post" enctype="multipart/form-data"> <table> <tr> <td>上传文件</td> <td>标题：<input type="text" name="uploadFileName" /> <input type="file" name="upload" /><br/> 标题：<input type="text" name="uploadFileName" /> <input type="file" name="upload" /><br/> 标题：<input type="text" name="uploadFileName" /> <input type="file" name="upload" /><br/> 标题：<input type="text" name="uploadFileName" /> <input type="file" name="upload" /><br/> 标题：<input type="text" name="uploadFileName" /> <input type="file" name="upload" /> </td> </tr> <tr> <td><input type="submit" value="提交"/></td> <td><input type="reset" value="重置" /></td> </tr> </table> </form> </body> </html>

 

下载jsp页面：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <% 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 'download.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" mce_href="styles.css"> --> </head> <body> <c:forEach items="${uploadFiles}" var="files"> <img src="images/${files.uploadRealName }" mce_src="images/${files.uploadRealName }" alt="ds" width="200px" height="300px" /> <a href="download.action?name=${files.uploadFileName }&realname=${files.uploadRealName }" mce_href="download.action?name=${files.uploadFileName }&realname=${files.uploadRealName }" >${files.uploadFileName }</a><br/> </c:forEach> </body> </html>

 

郁闷、今天好不容易等到毕业证书已经下来的消息、没想到啊、没有我的、因为我补考过、所以毕业证书要晚一点到。

现在人事部的经理一天问着要证书、见着她我都绕路走！！！真想艹一句~~~~：fuck ！