Question

我正在使用java编辑器HTML工具包类来显示包含复选框的公共html页面。我想为我的面板中显示的公共页面中出现的这些复选框构建一个监听器。有谁知道我应该寻找什么？我真的很感激任何帮助！

Answer 1

以下是一些非常古老的代码，可能有助于您的开始。

注意此代码如何检查DefaultComboBoxModel？好吧，我猜测，对于一个复选框，ButtonModel也可以在你的一个元素中找到。一旦你有权访问模型，你应该能够为它添加一个监听器。

不保证这会起作用。我建议你创建一些简单的测试HTML，看看你得到了什么样的输出。

import java.io.*;
import java.net.*;
import java.util.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.text.html.*;

class GetHTML
{
    public static void main(String[] args)
    {
        EditorKit kit = new HTMLEditorKit();
        Document doc = kit.createDefaultDocument();

        // The Document class does not yet handle charset's properly.
        doc.putProperty("IgnoreCharsetDirective", Boolean.TRUE);

        try
        {
            // Create a reader on the HTML content.
            Reader rd = getReader(args[0]);

            // Parse the HTML.
            kit.read(rd, doc, 0);
            System.out.println( doc.getText(0, doc.getLength()) );
            System.out.println("----");

            // Iterate through the elements of the HTML document.

            ElementIterator it = new ElementIterator(doc);
            Element elem = null;

            while ( (elem = it.next()) != null )
            {
                AttributeSet as = elem.getAttributes();
                System.out.println( "\n" + elem.getName() + " : " + as.getAttributeCount() );
/*
                if ( elem.getName().equals( HTML.Tag.IMG.toString() ) )
                {
                    Object o = elem.getAttributes().getAttribute( HTML.Attribute.SRC );
                    System.out.println( o );
                }
*/

                Enumeration enum1 = as.getAttributeNames();
                while( enum1.hasMoreElements() )
                {
                    Object name = enum1.nextElement();
                    Object value = as.getAttribute( name );
                    System.out.println( "\t" + name + " : " + value );

                    if (value instanceof DefaultComboBoxModel)
                    {
                        DefaultComboBoxModel model = (DefaultComboBoxModel)value;

                        for (int j = 0; j < model.getSize(); j++)
                        {
                            Object o = model.getElementAt(j);
                            Object selected = model.getSelectedItem();

                            if ( o.equals( selected ) )
                                System.out.println( o + " : selected" );
                            else
                                System.out.println( o );
                        }
                    }
                }


                //

                if ( elem.getName().equals( HTML.Tag.SELECT.toString() ) )
                {
                    Object o = as.getAttribute( HTML.Attribute.ID );
                    System.out.println( o );
                }

                //  Wierd, the text for each tag is stored in a 'content' element
                if (elem.getElementCount() == 0)
                {
                    int start = elem.getStartOffset();
                    int end = elem.getEndOffset();
                    System.out.println( "\t" + doc.getText(start, end - start) );
                }

            }

        }
        catch (Exception e)
        {
            e.printStackTrace();
        }

        System.exit(1);
    }

    // Returns a reader on the HTML data. If 'uri' begins
    // with "http:", it's treated as a URL; otherwise,
    // it's assumed to be a local filename.
    static Reader getReader(String uri)
        throws IOException
    {
        // Retrieve from Internet.
        if (uri.startsWith("http:"))
        {
            URLConnection conn = new URL(uri).openConnection();
            return new InputStreamReader(conn.getInputStream());
        }
        // Retrieve from file.
        else
        {
            return new FileReader(uri);
        }
    }
}

用于公共页面中复选框的Java编辑器HTML工具包类侦听器

1 个答案: