uploadaction.java

这是个很好的java语言上传的的例子 希望大家能够用的到

//Created by MyEclipse Struts
// XSL source (default): platform:/plugin/com.genuitec.eclipse.cross.easystruts.eclipse_4.1.0/xslt/JavaClass.xsl

package com.ascent.web.action;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

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

import org.apache.struts.Globals;
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.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.action.DynaActionForm;
import org.apache.struts.upload.FormFile;

/** 
 * MyEclipse Struts
 * Creation date: 05-06-2006
 * 
 * XDoclet definition:
 * @struts.action path="/upload" name="uploadForm" scope="request" validate="true"
 */
public class UploadAction extends Action {

	// --------------------------------------------------------- Instance Variables

	// --------------------------------------------------------- Methods

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(
		ActionMapping mapping,
		ActionForm form,
		HttpServletRequest request,
		HttpServletResponse response) {
		
		// TODO Auto-generated method stub
		
/**
 * 处理多个文件上传得过程
 */
		DynaActionForm upForm = (DynaActionForm) form;
		String dir = this.getServlet().getServletContext().getRealPath("/upload/uploaded");
		FormFile fileOne = (FormFile)upForm.get("file1");
		FormFile fileTwo = (FormFile)upForm.get("file2");
		FormFile fileThree = (FormFile)upForm.get("file3");
		FormFile fileFour = (FormFile)upForm.get("file4");
		FormFile[] files = new FormFile[]{fileOne, fileTwo, fileThree, fileFour};
		List fileList = new ArrayList();
		for(int i = 0;i<files.length;i++){
			if(files[i] == null)
				break;
			String fileName = files[i].getFileName();
			int size = files[i].getFileSize();
			try {
				InputStream streamIn = files[i].getInputStream();
				OutputStream streamOut = new FileOutputStream(dir + "/" + fileName);
				int bytesRead = 0;
				byte[] buffer = new byte[4096];
				while((bytesRead = streamIn.read(buffer, 0, 4096)) != -1)
					streamOut.write(buffer, 0, bytesRead);
				streamOut.close();
				streamIn.close();
			} catch (FileNotFoundException e) {
				e.printStackTrace();
				ActionMessages msgs = new ActionMessages();
				ActionMessage msg = new ActionMessage("error.upload.fail");
				msgs.add("error.upload.fail",msg);
				request.setAttribute(Globals.MESSAGE_KEY,msgs);
			} catch (IOException e) {
				e.printStackTrace();
				ActionMessages msgs = new ActionMessages();
				ActionMessage msg = new ActionMessage("error.upload.fail");
				msgs.add("error.upload.fail",msg);
				request.setAttribute(Globals.MESSAGE_KEY,msgs);
			}
			fileList.add(fileName);
			ActionMessages msgs = new ActionMessages();
			ActionMessage msg = new ActionMessage("error.upload.success");
			msgs.add("error.upload.success",msg);
			request.setAttribute(Globals.MESSAGE_KEY,msgs);
		}
System.out.println("-=-=-=-=-=-传输成功！！！！=-=-=-");
		return null;
	}

}