1.上传页面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'uploadMany.jsp' starting page</title>
<script type="text/javascript">
function insertRow()
{
var myTab = document.getElementById("tab");
var newRow = myTab.insertRow(myTab.length-1);
newRow.insertCell(0).innerHTML="选择文件：<input type='file' name='upload'>";
}
</script>
</head>
<body>
<form action="uploadMany.action" method="post" enctype="multipart/form-data">
<table id="tab" border="1">
<tr><td>选择文件：<input type="file" name="upload"/></td></tr>
<tr><td>
<input type="submit" value="上传">
<input type="reset" value="重置">
<input type="button" value="添加一个上传文件" onclick="insertRow()">
</td>
</tr>
</table>
</form>
</body>
</html>
2.上传Action
package com.zzab.upload;
import java.io.File;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class UploadManyAction extends ActionSupport { //因为要用到上传过滤拦截器所以必需继承ActionSupport
private static final long serialVersionUID = 1L;
private File[] upload;
private String[] uploadContentType;
private String[] uploadFileName;
private String savePath;
public String execute() throws Exception{
//以服务器的文件保存地址和原文件名建立上传文件输出流
File fileDirectoryFile = new File(getSavePath());
if (!fileDirectoryFile.exists()) {
fileDirectoryFile.mkdirs();
}
for(int i=0; i<upload.length; i++)
{
File savefile = new File(getSavePath(),uploadFileName[i]);
FileUtils.copyFile(upload[i], savefile);
}
ActionContext.getContext().put("message", "上传成功");
ActionContext.getContext().put("uploadMany", this); //这里要注意put的key不能是update
return "success";
}
//返回上传文件的保存位置
public String getSavePath() {
return ServletActionContext.getServletContext().getRealPath(savePath);
}
public void setSavePath(String savePath) {
this.savePath = savePath;
}
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;
}
}
3.struts.xml 文件的配置
<package name="myPackage" extends="struts-default">
<action name="login" class="com.zzab.interceptor.LoginAction">
<result>/index.jsp</result>
<result name="error">/error.jsp</result>
</action>
<action name="uploadAction" class="com.zzab.upload.UploadAction">
<!-- 文件类型拦截器 -->
<interceptor-ref name="fileUpload">
<param name="allowedTypes">image/jpeg,image/bmp,image/gif</param>
</interceptor-ref>
<interceptor-ref name="defaultStack"/>
<result name="success">/success.jsp</result>
<result name="input">/upload.jsp</result><!-- 失败转向input -->
<param name="savePath">/uploadfiles</param>
</action>
<action name="uploadMany" class="com.zzab.upload.UploadManyAction">
<result name="success">/success_Many.jsp</result>
<result name="input">/uploadMany.jsp</result><!-- 失败转向input -->
<param name="savePath">/uploadfiles</param>
</action>
</package>
4.上传成功页面
<body>
文件上传成功<hr/>
<c:forEach var="fileName" items="${uploadMany.uploadFileName}" varStatus="varindex">
文件名称:${fileName }<br/>
文件类型:${uploadMany.uploadContentType[varindex.index] }<br/>
===========================<br>
</c:forEach> </body>