Java Swing树状组件JTree用法实例详解

Java Swing树状组件JTree用法实例详解

本文实例讲述了java Swing树状组件JTree用法。分享给大家供大家参考，具体如下：

一、简单样式

先看运行效果：

TreeNodeDemo.java

package awtDemo;

import javax.swing.JFrame;

import javax.swing.JTree;

import javax.swing.event.TreeSelectionEvent;

import javax.swing.event.TreeSelectionListener;

import RuwwabmmRJjavax.swing.tree.DefaultMutableTreeNode;

public class TreeNodeDemo {

public static void main(String[] args) {

// 创建没有父节点和子节点、但允许有子节点的树节点，并使用指定的用户对象对它进行初始化。

// public DefaultMutableTreeNode(Object userObject)

DefaultMutableTreeNode group1 = new DefaultMutableTreeNode("软件部");

TreeNode node1 = new TreeNode();

node1.setName("王雨");

node1.setNickName("漫天飞舞");

group1.add(new DefaultMutableTreeNode(node1));

TreeNode node2 = new TreeNode();

node2.setName("陈梦");

node2.setNickName("梦");

group1.add(new DefaultMutableTreeNode(node2));

TreeNode node3 = new TreeNode();

node3.setName("上官飞儿");

node3.setNickName("飞儿");

group1.add(new DefaultMutableTreeNode(node3));

DefaultMutableTreeNode group2 = new DefaultMutableTreeNode("销售部");

TreeNode node4 = new TreeNode();

node4.setName("上官婉儿");

node4.setNickName("婉儿");

group2.add(new DefaultMutableTreeNode(node4));

TreeNode node5 = new TreeNode();

node5.setName("上官巧儿");

node5.setNickName("巧儿");

group2.add(new DefaultMutableTreeNode(node5));

DefaultMutableTreeNode top = new DefaultMutableTreeNode("职员管理");

top.add(group1);

top.add(group2);

final JTree tree = new JTree(top);

JFrame f = new JFrame("JTreeDemo - jb51.net");

f.add(tree);

f.setSize(300, 300);

f.setVisible(true);

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

// 添加选择事件

tree.addTreeSelectionListener(new TreeSelectionListener()

{

@Override

public void valueChanged(TreeSelectionEvent e)

{

DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();

if (node == null){

return;

}//if

Object object = node.getUserObject();

TreeNode user = (TreeNode) object;

System.out.println("你选择了：" + user.toString());

}

});

}

}

TreeNode.java

package awtDemo;

public class TreeNode {

private String nickName = "";

private String name = "";

private String phone = "";

private int age;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getNickName() {

return nickName;

}

public void setNickName(String nickName) {

this.nickName = nickName;

}

public String getPhone() {

return phone;

}

public void setPhone(String phone) {

this.phone = phone;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

// 重点在toString，节点的显示文本就是toString

public String toString()

{

return name + "["+nickName+"]";

}

}

二、图标样式

运行效果：

TreeNode.java

package awtDemo;

public class TreeNode {

private String nickName = "";

private String name = "";

private String phone = "";

private int age;

private String imagePath = "";

public String getImagePath() {

return imagePahttp://th;

}

public void setImagePath(String imagePath) {

this.imagePath = imagePath;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getNickName() {

return nickName;

}

public void setNickName(String nickName) {

this.nickName = nickName;

}

public String getPhone() {

return phone;

}

public void setPhone(String phone) {

this.phone = phone;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

// 重点在toString，节点的显示文本就是toString

public String toString()

{

return name + "["+nickName+"]";

}

}

TreeCellRenderer.java

package awtDemo;

import java.awt.Component;

import javax.swing.ImageIcon;

import javax.swing.JTree;

import javax.swing.tree.DefaultMutableTreeNode;

import javax.swing.tree.DefaultTreeCellRenderer;

/**

* 自定义树描述类,将树的每个节点设置成不同的图标

*

*/

public class TreeCellRenderer extends DefaultTreeCellRenderer{

private static final long serialVersionUID = 1L;

/**

* 重写父类DefaultTreeCellRenderer的方法

*/

@Override

public Component getTreeCellRendererComponent(JTree tree, Object value,

boolean selected, boolean expanded, boolean isLeaf, int row,boolean hasFocus)

{

// 选中

if (selected)

{

setForeground(getTextSelectionColor());

}

else

{

setForeground(getTextNonSelectionColor());

}

// TreeNode

DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) value;

Object obj = treeNode.getUserObject();

if (obj instanceof TreeNode)

{

TreeNode node = (TreeNode) obj;

DefaultTreeCellRenderer tempCellRenderer = new DefaultTreeCellRenderer();

tempCellRenderer.setLeafIcon(new ImageIcon(node.getImagePath()));

return tempCellRenderer.getTreeCellRendererComponent(tree, node.toString(), selected, expanded, true, row, hasFocus);

}

else if (obj instanceof String)

{

String text = (String) obj;

DefaultTreeCellRenderer tempCellRenderer = new DefaultTreeCellRenderer();

tempCellRenderer.setOpenIcon(new ImageIcon("Image/open.jpg"));

tempCellRenderer.setClosedIcon(new ImageIcon("Image/close.jpg"));

return tempCellRenderer.getTreeCellRendererComponent(tree, text, selected, expanded, false, row, hasFocus);

}

return super.getTreeCellRendererComponent(tree, value, selected, expanded, isLeaf, row, hasFocus);

}

}

TreeNodeDemo.java

package awtDemo;

import javax.swing.JFrame;

import javax.swing.JTree;

import javax.swing.event.TreeSelectionEvent;

import javax.swing.event.TreeSelectionListener;

import javax.swing.tree.DefaultMutableTreeNode;

public class TreeNodeDemo {

public static void main(String[] args) {

// 创建没有父节点和子节点、但允许有子节点的树节点，并使用指定的用户对象对它进行初始化。

// public DefaultMutableTreeNode(Object userObject)

DefaultMutableTreeNode group1 = new DefaultMutableTreeNode("软件部");

TreeNode node1 = new TreeNode();

node1.setName("王雨");

node1.setNickName("漫天飞舞");

node1.setImagePath("Image/1.jpg");

group1.add(new DefaultMutableTreeNode(node1));

TreeNode node2 = new TreeNode();

node2.setName("陈梦");

node2.setNickName("梦");

node2.setImagePath("Image/2.jpg");

group1.add(new DefaultMutableTreeNode(node2));

TreeNode node3 = new TreeNode();

node3.setName("上官飞儿");

node3.setNickName("飞儿");

node3.setImagePath("Image/3.jpg");

group1.add(new DefaultMutableTreeNode(node3));

DefaultMutableTreeNode group2 = new DefaultMutableTreeNode("销售部");

TreeNode node4 = new TreeNode();

node4.setName("上官婉儿");

node4.setNickName("婉儿");

node4.setImagePath("Image/4.jpg");

group2.add(new DefaultMutableTreeNode(node4));

TreeNode node5 = new TreeNode();

node5.setName("上官巧儿");

node5.setNickName("巧儿");

node5.setImagePath("Image/5.jpg");

group2.add(new DefaultMutableTreeNode(node5));

DefaultMutableTreeNode root = new DefaultMutableTreeNode();

root.add(group1);

root.add(group2);

//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

final JTree tree = new JTree(root);

tree.setCellRenderer(new TreeCellRenderer());

tree.putClientProperty("JTree.lineStyle", "None");

tree.setRootVisible(true);

JFrame frame = new JFrame("JTreeDemo - jb51.net");

frame.add(tree);

frame.setSize(300, 300);

frame.setVisible(true);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

// 添加选择事件

tree.addTreeSelectionListener(new TreeSelectionListener()

{

@Override

public void valueChanged(TreeSelectionEvent e)

{

DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();

if (node == null){

return;

}//if

Object object = node.getUserObject();

if(object instanceof TreeNode)

{

TreeNode user = (TreeNode) object;

System.out.println("你点击了：" + user.toString());

}

else if(object instanceof String)

{

String text = (String)object;

System.out.println("你点击了：" + text);

}

}

});

}

}

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