Let's take a look at the implementation of these two different controls:
Smartupload:
<% @ page contenttype = "text / html; charset = GB2312"%> <% @ page import = "java.sql. *"%> <% @ Page Import = "com.jspsmart.upload. *"%>
<% // Installing Bean Smartupload Mysmartupload = New SmartUPload (); // Initialization MySmartupload.initialize (PageContext); // Set the maximum value upload, pay attention: If you set up a meeting here! MySmartupload.setMaxFileSize (500 * 1024 * 1024); // Upload file mysmartupload.upload (); // loop acquire all uploaded file for (int i = 0; i
Commons-fileupload:
<% @ page language = "java" contenttype = "text / html; charSet = GBK"%> <% @ page import = "java.util. *"%> <% @ page import = "org.apache.commons. FileUpload. * "%>
file upload </ title> </ head> <% diskfileupload fu = new diskfileupload (); // Setting Allow User Upload File Size, Units: Byte Fu. SetsizeMax (10000000); // Sets up to only data stored in memory, unit: byte fu.setSizeTHRESHOLD (4096); // Setting Once the file size exceeds the value of GetSizThreshold (), the data is stored in the Directory FU of the hard disk. SetRepositoryPath ("D: // Tomcat5 // Temp"); // Start Read Upload Information List fileItems = Fu.Parsequest (Request); // Process each uploaded file itrator it = fileitems.ITerator (); while (oret () {fileItem item = (fileItem item = (fileItem) iter.next (); // ignore other form information if other than the file domain (! item.isformfield ()) {string name = item.getname (); Item.write ("D: // UploadTest //" Name);}}%> There is no problem in the case where the upload file is small, but the file is great, the CPU share will be large, solved. Methods seem to only restart the server.</p>
<p>Behind a lot, he first puts the file cache, waiting until the entire file is over, after a disposable copy file.</p>
<p>But both of the above two methods are HTTP file transfer, and the efficiency is not high! It is recommended to use FTP directly.</p></div><div class="text-center mt-3 text-grey">
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