tree3.java~26~

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.BorderLayout;
import java.awt.Dimension;
import java.sql.ResultSet;
import java.sql.SQLException;

public class Tree3 extends JPanel {
    DefaultMutableTreeNode root;
    DefaultMutableTreeNode child;
    DefaultTreeModel model;
    BorderLayout borderLayout1 = new BorderLayout();
    JScrollPane jScrollPane1 = new JScrollPane();
    JTree jTree1 = new JTree();

    public Tree3() {
        try {
            jbInit();
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

    private void jbInit() throws Exception {
    //       root = new DefaultMutableTreeNode("选择开头字母");
    //       node1 = new DefaultMutableTreeNode("A");
    //       node2 = new DefaultMutableTreeNode("B");
    //       node3 = new DefaultMutableTreeNode("C");
    //       model = new DefaultTreeModel(root);
    //       model.insertNodeInto(node1,root,root.getChildCount());
    //       model.insertNodeInto(node2,root,root.getChildCount());
    //       model.insertNodeInto(node3,root,root.getChildCount());
    //       child = new DefaultMutableTreeNode("airsick");
    //       model.insertNodeInto(child,node1,node1.getChildCount());
    //       child = new DefaultMutableTreeNode("burning hot");
    //       model.insertNodeInto(child,node2,node2.getChildCount());
    //       child = new DefaultMutableTreeNode("customer");
    //       model.insertNodeInto(child,node3,node3.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("选择开头单词");
       model = new DefaultTreeModel(root);
       try {
       Database db = new Database();
       ResultSet rs = db.query("select * from head_to_tail_word order by name");
           while (rs.next()) {
                 child = new DefaultMutableTreeNode(rs.getString(1));
                 model.insertNodeInto(child, root, root.getChildCount());
           }
       } catch (SQLException ex) {
           ex.printStackTrace();
       }
       return model;
   }

}