uploadaction.java

轻松实现上传功能 struts,

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

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.URLEncoder;
import java.util.List;

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

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.DynaActionForm;
import org.apache.struts.upload.FormFile;


/** 
 * MyEclipse Struts
 * Creation date: 10-27-2007
 * 
 * XDoclet definition:
 * @struts.action path="/upload" name="uploadForm" input="/upload1.jsp" parameter="method" scope="request" validate="true"
 */
public class UploadAction extends Action {
	/*
	 * Generated Methods
	 */

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		DynaActionForm uploadForm = (DynaActionForm) form;// TODO Auto-generated method stub
		
		String filename = uploadForm.getString("filename");
		FormFile file = (FormFile) uploadForm.get("filepath");
		System.out.print(file);
		String filepath = request.getRealPath("/lin");
		System.out.print(filepath);
		int fileMaxSize = 3 * 1024 * 1024;
		int filesize=file.getFileSize();
		
		if(filesize>fileMaxSize)
		{
			try {
				response.setContentType("text/html;charset=utf-8");
				PrintWriter out = response.getWriter();
				out.print("<script>alert('您上传的文件太大,谢谢');window.open('upload.jsp','_self'); </script>");
			 
			} catch (Exception e) {
			}
		}
		try {
			try {
				String a=filepath+"\\lin"+file.getFileName();
				InputStream stream = file.getInputStream();
				OutputStream bos = new FileOutputStream(a);
				int bytesRead = 0;
				byte[] buffer = new byte[64];
				System.out.print("");
				while ((bytesRead = stream.read(buffer, 0, 64)) != -1) {
					bos.write(buffer, 0, bytesRead);
				}
				bos.close();
				stream.close();
				
				try {
					response.setContentType("text/html;charset=utf-8");
					PrintWriter out = response.getWriter();
					out.print("<script>alert('文章上传成功,请点击确定');window.open('upload.jsp','_self'); </script>");
				 
				} catch (Exception e) {
				}

			} catch (FileNotFoundException e) {
				e.printStackTrace();
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		
		return null;
	}

}