struts1实现文件上传

package oa.file.action;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.DateFormat;
import java.text.DecimalFormat;
import java.util.Date;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;

public class FileAction extends DispatchAction {
public ActionForward upLoadFile(ActionMapping mapping, ActionForm form,HttpServletRequest request,HttpServletResponse response) throws Exception {
Date date = new Date();
//FormFile用于指定存取文件的类型
//获取当前的文件
File file = new File("");
// 获得系统的绝对路径 String dir = servlet.getServletContext().getRealPath("/image");
//我上传的文件没有放在服务器上。而是存在D:D:\\loadfile\\temp\\
String dir="D:\\loadfile\\temp\\";
int i = 0;
String type = file.getFileName();
while(i!=-1){