HTML5实现多文件的上传示例代码

[转自] http://www.jb51.net/html5/136791.html

主要用到的是<input>的multiple属性

代码如下:

<input type="file" name="multipleFileUpload" multiple />

下面是页面的详细代码：

代码如下:

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Solution 4-5: Sending multiple files</title>
</head>
<body>
	<form id="myForm"
		action="http://10.10.25.31:8080/myupload/UploadPhotoServlet"
		ENCTYPE="multipart/form-data" METHOD="POST">
		<input type="file" name="multipleFileUpload" multiple /> <input
			type="submit" value="提交"> <input type="reset" value="重设">
	</form>
</body>
</html>

java后台的详细代码：

代码如下:

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

/**
 * Servlet implementation class UploadPhotoServlet
 */
public class UploadPhotoServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

	/**
	 * @see HttpServlet#HttpServlet()
	 */
	public UploadPhotoServlet() {
		super();
		// TODO Auto-generated constructor stub
	}

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doPost(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	@SuppressWarnings("unchecked")
	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		String imagePath = "c:\uploadFile\Image\" + getEachDate() + "\";// 按日期生成文件夹
		File uploadPath = new File(imagePath);
		if (!uploadPath.exists()) {
			uploadPath.mkdirs();
		}
		File tmp = new File("c:\tmp\");
		if (!tmp.exists()) {
			tmp.mkdirs();
		}
		DiskFileItemFactory factory = new DiskFileItemFactory();// 创建磁盘工厂
		factory.setRepository(tmp);// 设置文件缓存路径
		factory.setSizeThreshold(10 * 1096);// 将文件保存在内存还是磁盘临时文件夹的默认临界值，值为10240，即10kb
		ServletFileUpload sfu = new ServletFileUpload(factory);// 创建处理工具
		sfu.setSizeMax(10 * 1024 * 1024);// 服务器端可以接收的最大文件大小，-1表示无上限
		String fileName = null;
		try {
			List<FileItem> list = sfu.parseRequest(request);// 解析
			if (list.size() < 1) {
				return;
			}
			for (int j = 0; j < list.size(); j++) {
				FileItem item = list.get(j);
				fileName = item.getName();
				if (fileName.equals("")) {
					request.getRequestDispatcher("/com/visualizerPhoto.jsp")
							.forward(request, response);
					return;
				}
				int pos = fileName.lastIndexOf(".");// 取图片文件格式
				if (pos > 0) {
					Date date = new Date();
					fileName = imagePath + date.getTime()
							+ fileName.substring(pos);
				}
				System.out.println("item:" + item);
				item.write(new File(fileName));// 写到磁盘
			}
		} catch (FileUploadException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	// 13-11-15
	public static String getEachDate() {
		Calendar cal = Calendar.getInstance();
		cal.add(Calendar.DATE, 0);
		String yesterday = new SimpleDateFormat("yyyy-MM-dd ").format(cal
				.getTime());
		String[] dates = yesterday.split("-");
		String realDate = dates[0].substring(2, 4) + "-" + dates[1] + "-"
				+ dates[2];
		return realDate.trim();
	}
}

下面是效果图：