jsp资料上传 _JavaScript

jsp文件上传

支持多文件上传?
所需jar包?
1. commons-FileUpload 1.2 包?
2. commons-IO 1.3.1 包?
3. Commons-BeanUtils 1.8 包?

-----------------------------------upload.jsp-----------------------------------?

Java代码?

<html>????
<head>????
<title>Jsp+Servlet?upload?file</title>????
</head>????
<body>????
??<form?action="uploadServlet"?method="POST"?enctype="multipart/form-data">????
????<input?type?="file"?name="file1"/><br/>????
????<input?type?="file"?name="file2"/><br/>????
????<input?type="submit"?value="Submit"?/><br/>????
????<input?type="reset"?/>????
??</form>????
</body>????
</html>??

??
--------------------------------------uploadServlet.java--------------------------------

Java代码?

package?lee.util;???
??
import?java.io.File;???
import?java.io.FileOutputStream;???
import?java.io.IOException;???
import?java.io.InputStream;???
import?java.io.OutputStream;???
??
import?javax.servlet.ServletException;???
import?javax.servlet.http.HttpServlet;???
import?javax.servlet.http.HttpServletRequest;???
import?javax.servlet.http.HttpServletResponse;???
??
import?org.apache.commons.fileupload.FileItemIterator;???
import?org.apache.commons.fileupload.FileItemStream;???
import?org.apache.commons.fileupload.disk.DiskFileItemFactory;???
import?org.apache.commons.fileupload.servlet.ServletFileUpload;???
import?org.apache.commons.logging.Log;???
import?org.apache.commons.logging.LogFactory;???
??
/**??
*?<p>Title:文件上传(支持多文件上传)</p>??
*?<p>Description>:FileUpLoad.java</p>??
*?<p>Create?Time:Nov?3,?2010?3:22:21?PM</p>??
*?<p>@version:?5.0</p>??
*?<p>@author:?LiWeichao</p>??
*/???
public?class?UploadServlet?extends?HttpServlet?{???
??
private?static?final?Log?log?=?LogFactory.getLog(UploadServlet.class);???
??
@Override???
protected?void?doGet(HttpServletRequest?req,?HttpServletResponse?resp)???
throws?ServletException,?IOException?{???
this.doPost(req,?resp);???
}???
??
@Override???
protected?void?doPost(HttpServletRequest?request,???
HttpServletResponse?response)?throws?ServletException,?IOException?{???
try?{???
String?fileName="";//上传到服务器的文件名???
????String?savePath?=?this.getServletContext().getRealPath("/")+"UploadFiles\\";???
????File?saveDir?=?new?File(savePath);?????
????if(!saveDir.isDirectory())//目录不存在则创建相应目录???
????????saveDir.mkdir();?????
if?(ServletFileUpload.isMultipartContent(request))?{???
DiskFileItemFactory?dff?=?new?DiskFileItemFactory();//?创建该对象???
dff.setSizeThreshold(1024000);//?指定在内存中缓存数据大小,单位为byte???
ServletFileUpload?sfu?=?new?ServletFileUpload(dff);//?创建该对象???
sfu.setFileSizeMax(5000000);//?指定单个上传文件的最大尺寸(单个文件大小不超过5M)???
sfu.setSizeMax(20000000);//?指定一次上传多个文件的总尺寸(总文件大小不超过20M)???
FileItemIterator?fii?=?sfu.getItemIterator(request);//?解析request???
//?请求,并返回FileItemIterator集合???
while?(fii.hasNext())?{???
FileItemStream?fis?=?fii.next();//?从集合中获得一个文件流???
if?(!fis.isFormField()?&&?fis.getName().length()?>?0)?{//?过滤掉表单中非文件域???
//?根据系统时间生成上传文件的文件名?避免重复和中文乱码???
fileName?=?fis.getName().trim();???
fileName=System.currentTimeMillis()+fileName.substring(fileName.lastIndexOf("."));???
//获取文件写入流???
InputStream?stream=fis.openStream();???
//创建输出流???
OutputStream?bos=new?FileOutputStream(savePath+fileName);???
int?bytesRead?=?0;???
byte[]?buffer?=?new?byte[8192];???
while?((bytesRead?=?stream.read(buffer,?0,?8192))?!=?-1){???
bos.write(buffer,?0,?bytesRead);//将文件写入服务器???
}???
bos.close();???
stream.close();???
}???
}???
response.getWriter().println("File?upload?successfully!!!");//?终于成功了,还不到你的上传文件中看看,你要的东西都到齐了吗???
}???
}?catch?(Exception?e)?{???
log.error("#ERROR#:上传附件发生错误，请检查!",e);???
e.printStackTrace();???
}???
??
}???
}???

-----------------------------------web.xml-----------------------------------

Java代码?

<servlet>???
<servlet-name>uploadServlet</servlet-name>???
<servlet-class>lee.util.UploadServlet</servlet-class>???
</servlet>???
<servlet-mapping>???
<servlet-name>uploadServlet</servlet-name>???
<url-pattern>/uploadServlet</url-pattern>???
</servlet-mapping>