如果让HTML显示在Applet里并打印出来?

Question

import java.awt.*;
import java.sql.*;
import java.net.*;
import javax.swing.*;
import java.util.*;
import javax.swing.event.*;
import javax.swing.tree.*;class HTMLFrame extends JFrame {
    JSplitPane jSplitPane1 = new JSplitPane();
    CardLayout cardLayout1 = new CardLayout();
    JScrollPane jScrollPane1 = new JScrollPane();
    JScrollPane jScrollPane2 = new JScrollPane();
    JEditorPane content = new JEditorPane();
    JTree jTree_help = new JTree();
    ShellFrame shell_frame;
    DBConnection conn;
    Vector vparent_node = new Vector();
    Vector vchild_node = new Vector();
    String install_directory = "";
    int init_flag = 0;    HTMLFrame(ShellFrame new_frame) {
        shell_frame = new_frame;
        conn = shell_frame.getConnection();
        install_directory = shell_frame.install_directory;
        try  {
            jbInit();
        }
        catch(Exception e) {
            e.printStackTrace();
        }
    }    private void jbInit() throws Exception {
        this.getContentPane().setLayout(cardLayout1);
        content.setBorder(BorderFactory.createLoweredBevelBorder());        content.setEditable(false);
        content.addHyperlinkListener(new HyperlinkListener(){
           public void hyperlinkUpdate(HyperlinkEvent event){
              setURL(event.getURL());
           }
        });
        fill_jTree();
        this.getContentPane().add(jSplitPane1, "jSplitPane1");
        jSplitPane1.add(jScrollPane1, JSplitPane.LEFT);
        jScrollPane1.getViewport().add(jTree_help, null);
        jSplitPane1.add(jScrollPane2, JSplitPane.RIGHT);
        jScrollPane2.getViewport().add(content, null);
        jSplitPane1.setDividerLocation(200);
        jTree_help.addTreeSelectionListener(new javax.swing.event.TreeSelectionListener() {            public void valueChanged(TreeSelectionEvent e) {
                jTree_help_valueChanged(e);
            }
        });
      Dimension screen_size = this.getToolkit().getScreenSize();
      setLocation (0,0);
      setSize(screen_size.width, screen_size.height-26);
      this.setIconImage(Toolkit.getDefaultToolkit().createImage(shell_frame.str_init_directory.substring(6)+"/images/图标.jpg"));
    }    void fill_jTree(){
      if(init_flag>=1)
        return;
      try{
        HTreeNode root = new HTreeNode("帮助");
        root.set_address("/help/帮助.htm");
        //构造子结点
        jTree_help = new JTree(root);
      } catch (Exception ex) {
        ex.printStackTrace();
      }
    }
    
    void jTree_help_valueChanged(TreeSelectionEvent e) {
       TreePath SelectedTreePath = e.getNewLeadSelectionPath();
       HTreeNode SelectedNode;
       if (SelectedTreePath == null) {
          SelectedNode = null;
          return;
       }
       SelectedNode = (HTreeNode)SelectedTreePath.getLastPathComponent();
       System.out.println(SelectedNode.get_address());
       try{
          URL newURL = new URL(shell_frame.str_init_directory+SelectedNode.get_address());
          setURL(newURL);
       } catch (Exception ex) {
          System.out.println("this is exception!");
       }
    }    void setURL(URL newURL){
      try{
        content.setPage(newURL);
      } catch (Exception ex) {
        ex.printStackTrace();
      }
    }    void setContent(String directory){
      try{
        URL url = new URL(shell_frame.str_init_directory+directory);
        setURL(url);
      } catch (Exception ex) {
        ex.printStackTrace();
      }
    }class HTreeNode extends DefaultMutableTreeNode{
    String help_address = "";
    int tree_id = 0;
    HTreeNode(Object  userObject) {
      super(userObject);
    }    void set_address(String new_help_address){
      help_address = new_help_address;
    }    String get_address(){
      return help_address;
    }    void set_tree_id(int new_tree_id){
      tree_id = new_tree_id;
    }    int get_tree_id(){
      return tree_id;
    }}
}

Answer 1

没能通过,
    ShellFrame shell_frame;
    DBConnection conn;
二句都有错!

Answer 2

这两个你可以不要，DBConnection是用来与数据库通讯的，
ShellFrame是用来取得HTML所在路径的。

Answer 3

只要用applet.getappletcontext方法得到appletcontext对象，然后调用appletcontext的showdocument（url,target）就可以了。当然这样不是在applet里显示的，不过你可以把一个page做成多个frames
在target里指定frame的名字就可以显示到相应的frames中去，我想也可以达到和在applet显示差不多的效果。

Answer 4

TO:binriyue(日月)
祝贺你加升星了
你可将DBConnection\ShellFrame拿掉后给我一个完整的例子吗?
Email:[email protected]