[Java]Swing树状组件JTree

2023-12-11 21:30
文章标签 java 组件 树状 swing jtree

本文主要是介绍[Java]Swing树状组件JTree，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

一 简单样式

这里写图片描述

TreeNodeDemo.java

package com.sjf;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() {@Overridepublic void valueChanged(TreeSelectionEvent e) {DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();if (node == null){return;}//ifObject object = node.getUserObject();TreeNode user = (TreeNode) object;System.out.println("你选择了：" + user.toString());}});}
}

TreeNode.java

package com.sjf;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

这里写图片描述

TreeNode.java

package com.sjf;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) {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 com.sjf;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*/@Overridepublic 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());}// TreeNodeDefaultMutableTreeNode 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 com.sjf;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(false);JFrame frame = new JFrame("JTreeDemo");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() {@Overridepublic void valueChanged(TreeSelectionEvent e) {DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();if (node == null){return;}//ifObject 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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