News新闻

业界新闻动态、技术前沿
Who are we?

您的位置：首页      网站知识      html5实现多文件的上传示例代码

html5实现多文件的上传示例代码

发布日期：2014-02-15 00:00:00 820

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 
 

复制代码
代码如下:

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


下面是页面的详细代码： 
 

复制代码
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： 
 

复制代码
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：

相关文章