tree1.java~62~

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.*;
import javax.swing.tree.*;
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.event.AncestorEvent;
import javax.swing.event.AncestorListener;
import java.sql.ResultSet;
import java.sql.*;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;

public class Tree1 extends JPanel {
    DefaultMutableTreeNode root;
    DefaultMutableTreeNode node1;
    DefaultMutableTreeNode node2;
    DefaultMutableTreeNode child;
    DefaultTreeModel model;
    BorderLayout borderLayout1 = new BorderLayout();
    JTree jTree1 = new JTree();
    Texts jpanel = new Texts();

    public Tree1(Texts jpanel) {
        try {
            this.jpanel = jpanel;
            jbInit();
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

    private void jbInit() throws Exception {
        jTree1 = new JTree(this.gettreemodel());
        JScrollPane jScrollPane1 = new JScrollPane(jTree1,
                             JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                             JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
        this.setLayout(borderLayout1);
        this.setPreferredSize(new Dimension(100, 290));
        jTree1.addTreeSelectionListener(new Tree1_jTree1_treeSelectionAdapter(this));
        this.add(jScrollPane1, java.awt.BorderLayout.CENTER);
        jScrollPane1.getViewport().add(jTree1);
    }

    public DefaultTreeModel gettreemodel(){
        root = new DefaultMutableTreeNode(" 对话练习");
        node1 = new DefaultMutableTreeNode("日常口语");
        node2 = new DefaultMutableTreeNode("复杂口语");
        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 spokenlanguage");
            while (rs.next()) {
              if(rs.getString(3).equals("simple")){
                  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;
    }

    public void jTree1_valueChanged(TreeSelectionEvent e) {
        String path = (String)e.getPath().toString();
        path = path.substring(path.lastIndexOf(",")+1,path.length()-1).trim();
        try {
        Database db = new Database();
        ResultSet rs = db.query("select * from spokenlanguage where name = '"+path+"'");
        if(rs.next()){
            jpanel.jTextPane1.setText(rs.getString(2));
        }
        } catch (SQLException ex) {
            ex.printStackTrace();
        }

    }
}


class Tree1_jTree1_treeSelectionAdapter implements TreeSelectionListener {
    private Tree1 adaptee;
    Tree1_jTree1_treeSelectionAdapter(Tree1 adaptee) {
        this.adaptee = adaptee;
    }

    public void valueChanged(TreeSelectionEvent e) {
        adaptee.jTree1_valueChanged(e);
    }
}