Automatically updated JSP download page

Automatically updated JSP download page

The method is to pass one JavaBean. JavaBean is excited in the JSBEAN, and when the folder is updated, JavaBean searches for updated files and the existing files. Visitors download. Each of the downloaded files (such as file.zip) has a corresponding description file (such as file.txt), this JavaBean will display the description of the file .txt as a description of the download file as an additional information as a download link. If there is no corresponding .txt description file, "no descrition" will be displayed.

Below is the content of JavaBean

/ * * Created on 2004-7-22 * @Author lingch * * functions: * 1. Search the Directory for Files. * 2. Return The Coresponding .txt description content. * / Package p; import java.io. *; Import java.util. *;

public class files_lookup {File files; Vector result; public files_lookup () {} public Vector lookup_files (String path) // --------- path should be the downloads dir {Vector result = new Vector (); files = new file (path); string sub_files []; if (files.Indirectory ()) {sub_files = files.list (); // --------- List all files under downloads dir} else {Result .add ("path" path "is not a dir"); returnrate;} for (int i = 0; i = 0) {Continue; // ------------- .txt Are Description Files.not for Downloading.} Result.add (Sub_Files [i]);} Return Result;} Public String get_file_description (String file_name) // ---- path should be a file name that collecting info {File file = new File (file_name); String description = "no description"; String f_name = file_name.substring (0, file_name.lastIndexOf (".")); f_name = f_name ". TXT"; // ------ Change the extension file name to .txt filareader rd; bufferedreader brd; try {// r EAD.txt content rd = new fileReader; brd = new bufferedreader (rd); description = brd.readline (); string temp; while ((temp = brd.readline ())! = null) {description = Temp Brd.close ();} catch (filenotfoundexcection ee) {} catch (ooException ee) {} return description;}}}}

The JSP page can organize <% @ Page ContentType = "text / html; charset = GB2312" Language = "" "@ Page Language =" Java "import =" p. * "%>