tree4.java~28~

该文件中包含有源代码及一部分的文档,该系统是一个小型的英语单词字典的系统.

package english;

import java.awt.*;
import javax.swing.tree.*;
import javax.swing.*;
import java.awt.Dimension;
import java.awt.BorderLayout;
import javax.swing.event.AncestorEvent;
import javax.swing.event.AncestorListener;
import java.awt.event.ActionEvent;
import java.sql.ResultSet;
import java.sql.SQLException;
import english.Database;

public class Tree4 extends JPanel {
    DefaultMutableTreeNode root;
    DefaultMutableTreeNode node1;
    DefaultMutableTreeNode node2;
    DefaultMutableTreeNode child;
    DefaultTreeModel model;
    BorderLayout borderLayout1 = new BorderLayout();
    JScrollPane jScrollPane1 = new JScrollPane();
    JTree jTree1 = new JTree();

    public Tree4() {
        try {
            jbInit();
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

    private void jbInit() throws Exception {
//        root = new DefaultMutableTreeNode("歌曲曲目");
//        node1 = new DefaultMutableTreeNode("girl");
//        node2 = new DefaultMutableTreeNode("boy");
//        model = new DefaultTreeModel(root);
//        model.insertNodeInto(node1, root, root.getChildCount());
//        model.insertNodeInto(node2, root, root.getChildCount());
//        child = new DefaultMutableTreeNode("WANNABE");
//        model.insertNodeInto(child, node1, node1.getChildCount());
//        child = new DefaultMutableTreeNode("right here warting");
//        model.insertNodeInto(child, node2, node2.getChildCount());
        jTree1 = new JTree(this.gettreemodel());
        JScrollPane jScrollPane1 = new JScrollPane(jTree1,
                JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        this.add(jScrollPane1, java.awt.BorderLayout.CENTER);
        this.setLayout(borderLayout1);
        this.setPreferredSize(new Dimension(100, 290));
        this.add(jScrollPane1, java.awt.BorderLayout.CENTER);
        jScrollPane1.getViewport().add(jTree1);
    }

    public DefaultTreeModel gettreemodel(){
         root = new DefaultMutableTreeNode("歌曲曲目");
         node1 = new DefaultMutableTreeNode("boy");
         node2 = new DefaultMutableTreeNode("gril");
         model = new DefaultTreeModel(root);
         model.insertNodeInto(node1, root, root.getChildCount());
         model.insertNodeInto(node2, root, root.getChildCount());
         try {
         Database db = new Database();
         ResultSet rs = db.query("select * from music");
             while (rs.next()) {
               if(rs.getString(3).equals("boy")){
                   child = new DefaultMutableTreeNode(rs.getString(1));
                   model.insertNodeInto(child, node1, node1.getChildCount());
               } else {
                   child = new DefaultMutableTreeNode(rs.getString(1));
                   model.insertNodeInto(child, node2, node2.getChildCount());
               }
             }
         } catch (SQLException ex) {
             ex.printStackTrace();
         }
         return model;
     }

}