The most recent project encountered the problem of importing Excel files and saving the data in the file to a database, so I practiced the file upload.
One, page upload.jsp file
<body>
<form name= "Upform" action= "Uploadservlet" method= "POST" enctype= "Multipart/form-data" >
<input type = "File" name= "File1" id= "File1"/><br/>
<input type = "File" name= "File2" id= "File2"/><br/>
<input type = "File" name= "File3" id= "File3"/><br/>
<input type= "Submit" value= "Submit"/><br/>
<input type= "Reset"/>
</form>
</body>
Second, servlet file Uploadservlet.java
Import Java.io.BufferedInputStream;
Import Java.io.BufferedOutputStream;
Import Java.io.File;
Import Java.io.FileOutputStream;
Import java.io.IOException;
Import javax.servlet.ServletException;
Import Javax.servlet.http.HttpServletRequest;
Import Javax.servlet.http.HttpServletResponse;
Import Org.apache.commons.fileupload.DefaultFileItemFactory;
Import Org.apache.commons.fileupload.FileItemFactory;
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.fileupload.util.Streams;
public class Uploadservlet extends Javax.servlet.http.HttpServlet implements Javax.servlet.Servlet {
File Tmpdir = null;//initialization of the uploaded file temporary storage directory
File Savedir = null;//The saved directory after initializing the uploaded file
Public Uploadservlet () {super (); }
protected void doget (HttpServletRequest request, httpservletresponse response) throws Servletexception, IOException {
DoPost (Request,response);
}
public void Init () throws Servletexception {
Super.init ();
String Tmppath = "C:\\tmpdir";
String Savepath = "C:\\updir";
Tmpdir = new File (Tmppath);
Savedir = new File (Savepath);
if (!tmpdir.isdirectory ())
Tmpdir.mkdir ();
if (!savedir.isdirectory ())
Savedir.mkdir ();
}
protected void DoPost (HttpServletRequest request, httpservletresponse response) throws Servletexception, IOException {
try{
if (servletfileupload.ismultipartcontent (request)) {
Diskfileitemfactory DFF = new Diskfileitemfactory ();//Create the object
Dff.setrepository (tmpdir);//Specify a temporary directory for uploaded files
Dff.setsizethreshold (1024000);//Specify Cache data size in memory, in bytes
Servletfileupload SFU = new Servletfileupload (DFF);//Create the object
Sfu.setfilesizemax (5000000);//Specify the maximum size of a single upload file
Sfu.setsizemax (10000000);//Specify the total size of multiple files uploaded at one time
Fileitemiterator FII = sfu.getitemiterator (request);
while (Fii.hasnext ()) {
Fileitemstream FIS = Fii.next ();//get a file stream from the collection
if (!fis.isformfield () && fis.getname (). Length () >0) {
System.out.println ("fff");
String fileName = Fis.getname (). substring (Fis.getname (). LastIndexOf (\) +1)//Get file name of uploaded files
System.out.println (FileName);
Bufferedinputstream in = new Bufferedinputstream (Fis.openstream ());//get file input stream
Bufferedoutputstream out = new Bufferedoutputstream (New FileOutputStream (savedir+ "\" +filename));//get file output stream
Streams.copy (in, out, true);//start writing files to your designated upload folder
}
}
Response.getwriter (). println ("File upload successfully!!!");
}
}
catch (Exception e) {
E.printstacktrace ();
}
}
}
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