Blog post Code test

1 ImportJava.io.File;2 ImportJava.io.FileOutputStream;3 Importjava.io.IOException;4 ImportJava.io.InputStream;5 Importjava.util.List;6 Importjavax.servlet.ServletException;7 ImportJavax.servlet.http.HttpServlet;8 Importjavax.servlet.http.HttpServletRequest;9 ImportJavax.servlet.http.HttpServletResponse;Ten ImportOrg.apache.commons.fileupload.FileItem; One Importorg.apache.commons.fileupload.disk.DiskFileItemFactory; A ImportOrg.apache.commons.fileupload.servlet.ServletFileUpload; -  -  Public classUploadhandleservletextendsHttpServlet { the  -      Public voiddoget (httpservletrequest request, httpservletresponse response) -             throwsservletexception, IOException { -                 //get uploaded files to save the directory, the uploaded files in the Web-inf directory, do not allow direct access to the outside world, to ensure the security of uploading files +String Savepath = This. Getservletcontext (). Getrealpath ("/web-inf/upload"); -File File =NewFile (savepath); +                 //determine if the saved directory for the uploaded file exists A                 if(!file.exists () &&!file.isdirectory ()) { atSystem.out.println (savepath+ "directory does not exist, need to create"); -                     //Create a directory - File.mkdir (); -                 } -                 //message Prompt -String message = ""; in                 Try{ -                     //Use the Apache File Upload component to process file upload steps: to                     //1. Create a diskfileitemfactory factory +Diskfileitemfactory factory =Newdiskfileitemfactory (); -                     //2. Create a file Upload parser theServletfileupload upload =Newservletfileupload (factory); *                      //solve the Chinese characters of uploading file name $Upload.setheaderencoding ("UTF-8"); Panax Notoginseng                     //3, determine whether the submitted data is the upload form data -                     if(!servletfileupload.ismultipartcontent (Request)) { the                         //get data in the traditional way +                         return; A                     } the                     //4, using the Servletfileupload parser to parse the upload data, the results of the analysis returned is a list<fileitem> collection, each fileitem corresponding to a form form input +list<fileitem> list =upload.parserequest (request); -                      for(Fileitem item:list) { $                         //if the data in the Fileitem is encapsulated in an ordinary entry $                         if(Item.isformfield ()) { -String name =item.getfieldname (); -                             //solve the problem of Chinese garbled data of ordinary input items theString value = item.getstring ("UTF-8"); -                             //value = new String (value.getbytes ("iso8859-1"), "UTF-8");WuyiSYSTEM.OUT.PRINTLN (name + "=" +value); the}Else{//If the upload file is encapsulated in Fileitem -                             //get the uploaded file name, WuString filename =item.getname (); - System.out.println (filename); About                             if(filename==NULL|| Filename.trim (). Equals ("")){ $                                 Continue; -                             } -                             //Note: Different browser submissions are not the same file name, some browsers submitted by the file name is with a path, such as: C:\a\b\1.txt, and some just simple file name, such as: 1.txt -                             //handles the path portion of the file name of the uploaded files that are obtained, leaving only the file name section Afilename = filename.substring (filename.lastindexof ("\ \") +1); +                             //gets the input stream of the uploaded file in item theInputStream in =Item.getinputstream (); -                             //Create a file output stream $FileOutputStream out =NewFileOutputStream (Savepath + "\ \" +filename); the                             //Create a buffer the                             byteBuffer[] =New byte[1024]; the                             //identifies whether the data in the input stream has been read out the                             intLen = 0; -                             //The loop reads the input stream into the buffer, and (len=in.read (buffer)) >0 indicates that there is data in it. in                              while(Len=in.read (buffer)) >0){ the                                 //writes the data of the buffer to the specified directory (savepath + "\ \" + filename) using the FileOutputStream output stream theOut.write (buffer, 0, Len); About                             } the                             //close the input stream the in.close (); the                             //turn off the output stream + out.close (); -                             //Delete temporary files generated when processing file uploads the Item.delete ();Bayimessage = "File Upload succeeded!" "; the                         } the                     } -}Catch(Exception e) { -message= "File upload failed! "; the e.printstacktrace (); the                      the                 } theRequest.setattribute ("Message", message); -Request.getrequestdispatcher ("/message.jsp"). Forward (request, response); the     } the  the      Public voidDoPost (httpservletrequest request, httpservletresponse response)94             throwsservletexception, IOException { the  the doget (request, response); the     }98}

Blog post Code test