1）前台代码：
<form action="fileupload2.action" method="post" enctype="multipart/form-data">
username:<input type="text" name="username"><br>
file1:<input type="file" name="file"><br>
file2:<input type="file" name="file"><br>
file3:<input type="file" name="file"><br>
<input type="submit" value="submit">
</form>
2）struts.xml配置：
<action name="fileupload2" class="com.wildcat.Action.fileupload2">
<result name="success">/FileUpload/fileuploadResult2.jsp</result>
</action>
3）action内容：
package com.wildcat.Action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class fileupload2 extends ActionSupport {
private String username;
//file定义成一个集合
private List<File> file;
private List<String> fileFileName;
private List<String> fileContentType;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public List<File> getFile() {
return file;
}
public void setFile(List<File> file) {
this.file = file;
}
public List<String> getFileFileName() {
return fileFileName;
}
public void setFileFileName(List<String> fileFileName) {
this.fileFileName = fileFileName;
}
public List<String> getFileContentType() {
return fileContentType;
}
public void setFileContentType(List<String> fileContentType) {
this.fileContentType = fileContentType;
}
@Override
public String execute() throws Exception {
//文件的上传
for (int i=0;i<file.size();i++){
//指定上传路径
String root=ServletActionContext.getRequest().getRealPath("/upload");
//输入流
InputStream is=new FileInputStream(file.get(i));
System.out.println("FileName: "+fileFileName);
byte [] buffer=new byte[400];
//输出流
OutputStream os=new FileOutputStream(new File(root,fileFileName.get(i)));
int length=0;
while (-1!=(length=is.read(buffer))){
os.write(buffer, 0, length);
}
is.close();
os.close();
}
return SUCCESS;
}
}
4）结果页面：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
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 'fileuploadResult2.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">
-->
</head>
<body>
username:<s:property value="username"/><br>
<!-- 使用struts2标签库 循环 -->
<s:iterator value="fileFileName" id="f">
filename:<s:property value="#f"/>
</s:iterator>
</body>
</html>