Struts上传文件

核心代码：

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.ljg.struts.action;


import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;


import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;


import com.ljg.struts.form.UserForm;


public class RegisterAction extends Action 
{


	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) 
	{
		UserForm userForm = (UserForm) form;// TODO Auto-generated method stub
		String userName=userForm.getUserName();
		FormFile formFile=userForm.getMyPhoto();
		String fileName=formFile.getFileName();
		int fileSize=formFile.getFileSize();
		System.out.println(fileName+" "+fileSize);
		InputStream is=null;
		OutputStream os=null;
		try 
		{
			is=formFile.getInputStream();
			String keepFilePath=this.getServlet().getServletContext().getRealPath("/file");
			System.out.println("keepFilePath===="+keepFilePath);
			os=new FileOutputStream(keepFilePath+"\\"+fileName);
			
			int length=0;
			byte[] bytes=new byte[1024];
			while((length=is.read(bytes))>0)
			{
				os.write(bytes, 0, length);
			}
		} catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
		}
		finally
		{
			try 
			{
				is.close();
				os.close();
			} catch (Exception e2) {
				// TODO: handle exception
				e2.printStackTrace();
			}
		}
		return null;
	}
}