第一步：首先创建一个多文件上传的页面
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>多文件上传</title>
</head>
<body>
<h1>多文件上传</h1>
<br><br>
<form action="/Struts2-day02pm/upload/multi_upload.action" method="post" enctype="multipart/form-data">
文件上传2：<br><br>
<input type="file" name="oneFiles"><br><br>
<input type="file" name="oneFiles"><br><br>
<input type="file" name="oneFiles"><br><br>
<input type="submit" value="开始多文件上传">
</form>
</body>
第二步：创建多文件上传的请求处理类MultiUploadAction继承BaseAction（BaseAction代码见单文件上传）
public class MultiUploadAction extends BaseAction { private static final long serialVersionUID = -4445894434193884175L; private File[] oneFiles; private String[] oneFilesFileName; private String[] oneFilesContentType; private HttpServletRequest request; @Override public void setServletRequest(HttpServletRequest request) { this.request = request; } @Override public String execute() throws Exception { String uploadPath = request.getServletContext().getRealPath("upload"); for (int i = 0; i < oneFiles.length; i++) { File file = new File(uploadPath, oneFilesFileName[i]);//拼接文件的存放路径和存放文件的真实名称 FileUtils.copyFile(oneFiles[i], file);//将临时文件复制到上面这个路径 } return SUCCESS; } public File[] getOneFiles() { return oneFiles; } public void setOneFiles(File[] oneFiles) { this.oneFiles = oneFiles; } public String[] getOneFilesFileName() { return oneFilesFileName; } public void setOneFilesFileName(String[] oneFilesFileName) { this.oneFilesFileName = oneFilesFileName; } public String[] getOneFilesContentType() { return oneFilesContentType; } public void setOneFilesContentType(String[] oneFilesContentType) { this.oneFilesContentType = oneFilesContentType; } public HttpServletRequest getRequest() { return request; } public void setRequest(HttpServletRequest request) { this.request = request; } }
第三步：配置struts.xml配置文件
<struts>
<package name="upload-default" namespace="/upload" extends="struts-default">
<action name="multi_upload" class="com.struts2.day02pm.action.MultiUploadAction">
<result>/WEB-INF/jsp/multi_upload_ok.jsp</result>
</action>
</package>
</struts>
第四步：前台页面测试上传文件