1) An applet will need to be 'trusted' before it can do any such thing.
2) To be trusted, it will need to be signed and accepted as trusted by
the end user.
3) converting the table data to HTML is relatively trivial, so..

...a third party 'component' is entirely overkill!

Andrew T.

Write code to do it. Open a text file. Write the page's HTML header and
start of the body to the file. Write the start of an HTML table to the
file. For each row, read the data from the table model, replace special
HTML entities in the data, generate an HTML table row and write it to
the file. At the end close the HTML table, the HTML body and the HTML
root element. Close the file.

If you want to store the file locally you will need to sign the applet.

Writing the code should consume much less time than searching for some
3rd party tool and learning that tool. This is an almost trivial
programming task.

/Thomas

Perhaps not directly relevant (it's a piece of cake to generate HTML
from the table model), but I thought I'd try using JTable itself (well,
the PL&F) to generate HTML. JTable supports copying as HTML via
clipboards and drag and drop, which we can exploit with a private
clipboard. Disappointing code and disappointing results below.

Some bad points:

 o You need to mutate the table (select all).
 o The APIs are cumbersome.
 o Actual requirements of the implementation are under specified.
 o The table is plain, with just toString applied to data.
 o Even the header isn't included.
 o There's no sensible extension mechanism.
 o It's not particularly efficiently coded.

Tom Hawtin

import java.awt.*;
import java.awt.datatransfer.*;
import javax.swing.*;

class ExportTableAsHTMLDemo {
    private static final DataFlavor HTML_STRING_FLAVOR;
    static {
        // The datatransfer API could do with some work here...
        try {
            HTML_STRING_FLAVOR = new DataFlavor(
                "text/html;class=java.lang.String"
            );
        } catch (ClassNotFoundException exc) {
            // Don't even load class.
            throw new Error(exc);
        }
    }
    public static void main(String[] args) {
        java.awt.EventQueue.invokeLater(new Runnable() {
                public void run() {
                    go();
                }
        });
    }
    public static void go() {
        // Some random data.
        javax.swing.JTable table = new javax.swing.JTable(
            new Object[][]{
                new Object[] { "some", "data" },
                new Object[] { "more", "data" },
            },
            new Object[] { "Col A", "Col B" }
        );

        // Exports selected data only.
        table.selectAll(); // Evil.

        javax.swing.TransferHandler handler =
            table.getTransferHandler();
        if (handler == null) {
            System.err.println("No transfer handler.");
            return;
        }
        int actions = handler.getSourceActions(table);
        if ((actions & javax.swing.TransferHandler.COPY) == 0) {
            System.err.println("Table does not support copy.");
            return;
        }

        java.awt.datatransfer.Clipboard clipboard =
            new java.awt.datatransfer.Clipboard(
                "Export table as HTML private clipboard"
            );
        try {
            handler.exportToClipboard(
                table, clipboard, javax.swing.TransferHandler.COPY
            );
        } catch (IllegalStateException exc) {
            exc.printStackTrace();
            return;
        }
        java.awt.datatransfer.Transferable transferable =
            clipboard.getContents(/* unused... */null);
        if (transferable == null) {
            System.err.println("Clipboard empty");
            return;
        }
        // Just support HTML as String.
        // Could also use HTML as Reader or UTF-8 InputStream
        //   (particularly for large tables,
        //     if the implementation was better).
        if (!transferable.isDataFlavorSupported(HTML_STRING_FLAVOR)) {
            System.err.println("HTML (String) not supported");
            return;
        }
        try {
            Object data = transferable.getTransferData(
                HTML_STRING_FLAVOR
            );
            System.out.println(data);
        } catch (java.io.IOException exc) {
            exc.printStackTrace();
            return;
        } catch (java.awt.datatransfer.UnsupportedFlavorException exc) {
            System.err.println("HTML (String) not supported");
            return;
        }
    }
}

<html>
<body>
<table>
<tr>
  <td>some</td>
  <td>data</td>
</tr>
<tr>
  <td>more</td>
  <td>data</td>
</tr>
</table>
</body>
</html>