| 标题 | html5实现多文件的上传示例代码 |
| 范文 | 多文件的上传在以前或许实现起来会很复杂，不过自从html5的出现，让其变得非常容易，下面有个不错的示例，大家可以参考下 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(); } } |
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