JavaSwing树状组件JTree用法实例详解

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JavaSwing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 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");
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 - ");
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) {
= 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 imagePath;
}
public void setImagePath(String imagePath) { this.imagePath = imagePath;
}
public String getName() {
return name;
}
public void setName(String 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 ponent;
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。