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(a) Introduction to Smartupload components
Smartupload Componentsfree components for file uploads and downloads (ii) features of Smartupload componentsSimple to use: Write a small amount of code, complete the upload download functionability to control upload contentability to control the size and type of uploaded filesCons: The update service is currently stopped(iii) SMARTUPLOAD component application conditions
File classes and methods
Smartupload class and methodImplementation of File Upload
Control the type of upload file
Control the size of uploaded files
Attention:
㈠ form Requirements
For the form form that uploads the file, there are two requirements:
1, Method application post, that is, method= "post".
2. Add attribute: enctype= "Multipart/form-data"
Case: Here is an example of the form form for uploading a file:
form page indes.jsp<%@ Page Language="Java"Import="java.util.*"pageencoding="UTF-8"%><%StringPath=Request.getcontextpath ();StringBasePath=Request.getscheme ()+"://"+Request.getservername ()+":"+Request.getserverport ()+Path+"/";%><!DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en"><HTML> <Head> <Basehref= "<%=basePath%>"> <title>Smartupload</title> </Head> <Body> <formAction= "doupload.jsp"Method= "POST"enctype= "Multipart/form-data">Name:<inputtype= "text"name= "username" /><BR/>Password:<inputtype= "text"name= "pwd" /><BR/>file 1:<inputtype= "File"name= "File1" /><BR/>File 2:<inputtype= "File"name= "File2" /><BR/>File 3:<inputtype= "File"name= "File3" /><BR/>File 4:<inputtype= "File"name= "File4" /><BR/>file 5:<inputtype= "File"name= "File5" /><BR/>File 6:<inputtype= "File"name= "File6" /><BR/>File 7:<inputtype= "File"name= "File7" /><BR/> <inputtype= "Submit" /> </form> </Body></HTML>
Working with Form pages
<%@ page language= "Java"Import= "java.util.*" pageencoding= "UTF-8"%><% @pageImport= "Com.jspsmart.upload.SmartUpload"%><% @pageImport= "Com.jspsmart.upload.File"%><%//----processing upload files /*use Smartupload 1, add component jar package to Web-inf/lib package 2, set the form form's commit type to binary type*/ //Creating Smartupload ComponentsSmartupload su =Newsmartupload (); //initializing the component contextsu.initialize (PageContext); //Set EncodingSu.setcharset ("Utf-8"); Try{ //allowed file types to upload//su.setallowedfileslist ("Doc"); //limit the types of uploaded files//su.setdeniedfileslist ("bat"); //limit the size of uploaded files//Su.setmaxfilesize (2000); //Uploading Filessu.upload (); }Catch(Exception e) {%> <script type= "Text/javascript" >Alert ("Do not allow uploads: Bat,exe,jsp,html,htm,java,class file Type"); Location.href= "Index.jsp"; </script> <%} out.println ("Upload" +su.save ("upload\\") + "successful!!! of Files"); //Get form ItemsString name = Su.getrequest (). GetParameter ("username"); String pwd= Su.getrequest (). GetParameter ("pwd"); /*implement multi-file uploads*/ for(inti = 0; I < Su.getfiles (). GetCount (); i++){ //get a single fileFile File =su.getfiles (). GetFile (i); //determines whether the file is selected by the current document; if(File.ismissing ())Continue; //set the location of the upload serverString Path = "Upload\\"; //get the name of the uploaded fileString filename =File.getfilename (); //the path to the uploaded filePath = path +filename; //Save FileFile.saveas (path,smartupload.save_virtual); Out.println ("<table border=1>"); Out.println ("<tr><td> name:</td><td>" +name+ "</td></tr>"); Out.println ("<tr><td> password:</td><td>" +pwd+ "</td></tr>"); Out.println ("<tr><td> uploaded file name (filename):</td><td>" +filename+ "</td></tr>"); Out.println ("<tr><td> uploaded file Table item name (fliedname):</td><td>" +file.getfieldname () + "</td></tr>"); Out.println ("<tr><td> uploaded file Size (length) (size):</td><td>" +file.getsize () + "</td></tr>"); Out.println ("<tr><td> uploaded file extension (ext):</td><td>" +file.getfileext () + "</td></tr>"); Out.println ("</table><br/>"); }%>
Smartupload implementing file uploads
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