JSP component Commons-fileupload implementation file Upload _jsp programming

This example for you to share the JSP using Commons-fileupload to implement file upload code for your reference, the specific contents are as follows

1, Prepare:

Copy Commons-fileupload-1.1.zip and Commons-io-1.1.zip to the "\web-inf\lib" directory

2, First is Servlet:FileUpload.java

Package servlet;
Import Java.io.File;
Import java.io.IOException;
Import Java.io.PrintWriter;
Import java.util.*;
Import Java.util.regex.Pattern;

Import Java.util.regex.Matcher;
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; public class FileUpload extends HttpServlet {private String uploadpath= "e:\\addnetfile\\";//directories to upload files private file tem Ppath=new file ("e:\\tempfile\\");//directory of uploaded files public void doget (HttpServletRequest request, HttpServletResponse  Response) throws Servletexception, IOException {} public void DoPost (HttpServletRequest request, HttpServletResponse Response) throws Servletexception, IOException {RESponse.setcontenttype ("text/html;charset=gb2312");
 Response.setcharacterencoding ("gb2312");
 PrintWriter Out=response.getwriter ();
 Out.println ("The length of the request content is:" +request.getcontentlength ());
 
 Out.println ("The type of request content is:" +request.getcontenttype ());
 Diskfileitemfactory factory=new diskfileitemfactory ();
 Factory.setrepository (TempPath);
 
 Factory.setsizethreshold (4096);
 Servletfileupload upload=new servletfileupload (Factory);
 Upload.setsizemax (1000000);
 List<?> Fileitems=null;
  try{fileitems=upload.parserequest (Request);
  Iterator<?> Iterator=fileitems.iterator ();
  String regex= ". +\\\\ (. +) $";
  String[] errortype={". exe", ". com", ". CGI", ". asp"};
  Pattern P=pattern.compile (regex);
  while (Iterator.hasnext ()) {Fileitem item= (Fileitem) iterator.next ();
   if (!item.isformfield ()) {String name=item.getname ();
   Long Size=item.getsize (); if (name==null| |
   Name.equals ("") &&size==0) continue;
   Matcher M=p.matcher (name); if (M.find ()) {for (int temp=0;temp<errortype.length;temp++) {if (M.group (1). EndsWith (errortype[temp)) throw new IOException (name+ ": Wrong type");
    } try{Item.write (New File (Temppath,m.group (1)));
    Out.println (name+ "" +size+ "<br/>");
   Out.println ("Upload success");
   }catch (Exception e) {out.println ("333" +e);
   } else{throw new IOException ("fail to upload");
 }}}catch (IOException e) {out.println ("222" +e);
  catch (Fileuploadexception E1) {e1.printstacktrace ();
 Out.println ("+e1"); } public void Init () throws Servletexception {if (!new file (Uploadpath). Isdirectory ()) New File (Uploadpath). mkdir (
 );
 if (!temppath.isdirectory ()) Temppath.mkdir ();
 public void Destroy () {Super.destroy ();
 }

}

3, followed by html:Uploadfile.html

<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >  

4, finally is the configuration Web.xml

<servlet> <description>this is the description's my
  java ee component</description>
  < Display-name>this is, the display name of my Java EE component</display-name>
  <servlet-name>fileupload </servlet-name>
  <servlet-class>servlet. fileupload</servlet-class>
 </servlet>
<servlet-mapping>
  <servlet-name> Fileupload</servlet-name>
  <url-pattern>/servlet/FileUpload</url-pattern>

First run Html,servlet process upload request

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