先简单的粘贴下代码，正在学习java的东西，正好用到swing，算是做个练习。API太多，还没有梳理太清楚，慢慢回顾。
public class TreeFrame extends JFrame {
public static final int WIDTH = 1100;
public static final int HEIGHT = 615;
private static int xlocation ,ylocation;
private boolean xmlFlag = false;
private JPanel treeArea = new JPanel();
private JPanel buttons = new JPanel();
DefaultMutableTreeNode top = new DefaultMutableTreeNode("行政规划");
private JTree menuTree = new JTree(top);
private JTextArea text = new JTextArea();
DefaultTreeModel model;
FileOutputStream fos;
OutputStreamWriter osw;
public TreeFrame(){
this.setTitle("省份名称");
this.setSize(WIDTH, HEIGHT);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
xlocation = (screenSize.width-WIDTH)/2;
ylocation = (screenSize.height-HEIGHT)/2;
this.setLocation(xlocation, ylocation);
//设置关闭窗口
this.addWindowListener(new WindowListener() {
@Override
public void windowOpened(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowIconified(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowDeiconified(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowDeactivated(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowClosing(WindowEvent e) {
try {
fos=new FileOutputStream("xml/data.xml");
osw=new OutputStreamWriter(fos,"utf-8");
osw.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"+"\r\n");
model = (DefaultTreeModel)menuTree.getModel();
DefaultMutableTreeNode root = (DefaultMutableTreeNode)model.getRoot();
//头结点行政规划不用保存
saveToFile(root.getNextNode(), osw);
osw.close();
fos.close();
} catch (IOException error) {
error.printStackTrace();
}
System.exit(0);
}
@Override
public void windowClosed(WindowEvent e) {
// TODO Auto-generated method stub
}
@Override
public void windowActivated(WindowEvent e) {
// TODO Auto-generated method stub
}
});
Container container = this.getContentPane();
initTreeJPanel();
inintButtonJpanel();
JSplitPane mainFrameSplit = new JSplitPane();
mainFrameSplit.setEnabled(false);
mainFrameSplit.setLeftComponent(treeArea);
mainFrameSplit.setRightComponent(text);
treeArea.add(buttons,BorderLayout.SOUTH);
container.add(mainFrameSplit);
this.setMenuBar(getMenuBar());
}
/**
* 初始化按键区域
*/
public void inintButtonJpanel(){
model = (DefaultTreeModel)menuTree.getModel();
JButton addSiblingButton = new JButton("添加兄弟结点");
JButton addChildButton = new JButton("添加孩子结点");
JButton deleteSelectedButton = new JButton("删除选中结点");
JButton editSelectedButton = new JButton("编辑选中结点");
buttons.add(addChildButton);
buttons.add(addSiblingButton);
buttons.add(deleteSelectedButton);
buttons.add(editSelectedButton);
//添加编辑结点的监听
editSelectedButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
TreePath selectedPath = menuTree.getSelectionPath();
if(selectedPath!=null){
menuTree.startEditingAtPath(selectedPath);
}
text.append("编辑结点："+selectedPath+"\n");
}
});
//添加删除结点的监听
deleteSelectedButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
TreePath selectedPath = menuTree.getSelectionPath();
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode)menuTree.getLastSelectedPathComponent();
if (selectedNode!=null && selectedNode.getParent()!=null) {
model.removeNodeFromParent(selectedNode);
}
text.append("删除了一个结点："+selectedPath+"\n");
}
});
//添加孩子结点的监听
addChildButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode)menuTree.getLastSelectedPathComponent();
if (selectedNode == null) {
return;
}
DefaultMutableTreeNode newNode = new DefaultMutableTreeNode("新结点");
selectedNode.add(newNode);
TreeNode []nodes = model.getPathToRoot(newNode);
TreePath path = new TreePath(nodes);
menuTree.scrollPathToVisible(path);
menuTree.updateUI();
text.append("添加了一个结点："+path+"\n");
}
});
//添加兄弟节点结点的监听
addSiblingButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode)menuTree.getLastSelectedPathComponent();
if (selectedNode == null) {
return;
}
DefaultMutableTreeNode parent = (DefaultMutableTreeNode)selectedNode.getParent();
if (parent == null) {
return;
}
DefaultMutableTreeNode newNode = new DefaultMutableTreeNode("新结点");
int selectedIndex = parent.getIndex(selectedNode);
model.insertNodeInto(newNode, parent, selectedIndex + 1);
TreeNode []nodes = model.getPathToRoot(newNode);
TreePath path = new TreePath(nodes);
menuTree.scrollPathToVisible(path);
text.append("添加了一个结点："+path+"\n");
}
});
}
/**
* 初始化树形结构
*/
public void initTreeJPanel(){
menuTree.setEditable(true);
treeArea.setLayout(new BorderLayout());
int mainBorderWidth = getWidth();
int mainBorderHeight = getHeight();
treeArea.setPreferredSize(new Dimension(mainBorderWidth/4,mainBorderHeight) );
menuTree.setShowsRootHandles(true);
initTreeParam();
JScrollPane jScrollTree = new JScrollPane();
jScrollTree.getViewport().add(menuTree, 1);
treeArea.add(jScrollTree,BorderLayout.CENTER);
}
/**
* 初始化树形结构数据
*/
public void initTreeParam(){
DefaultMutableTreeNode rootnode = (DefaultMutableTreeNode)menuTree.getModel().getRoot();
rootnode.removeAllChildren();
xmlFlag = xmlParser("xml/data.xml", top);
if(!xmlFlag){
return;
}else {
TreeNode root = (TreeNode)menuTree.getModel().getRoot();
expandNode(menuTree,new TreePath(root),true,false);
}
}
/**
* 展开节点，好像有也可以
* @param tree
* @param parent
* @param expand
* @param expandChildren
*/
private void expandNode(JTree tree,TreePath parent,boolean expand,boolean expandChildren){
TreeNode node = (TreeNode)parent.getLastPathComponent();
if (node.getChildCount()>=0) {
for (Enumeration e = node.children();e.hasMoreElements() ;) {
TreeNode n = (TreeNode)e.nextElement();
TreePath path = parent.pathByAddingChild(n);
if (expandChildren) {
expandNode(tree, path, expand, expandChildren);
}
}
}
if (expand) {
tree.expandPath(parent);
}else {
tree.collapsePath(parent);
}
}
/**
* 将xml结点添加到swing树形结构
* @param path xml路径
* @param top swing树形结构的头结点
* @return
*/
private boolean xmlParser(String path,DefaultMutableTreeNode top){
File file = new File(path);
DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();
try {
DocumentBuilder dombuilder = domfac.newDocumentBuilder();
Document doc = dombuilder.parse(new FileInputStream(file));
Element root = doc.getDocumentElement();
String name = root.getAttribute("name");
DefaultMutableTreeNode newnode = new DefaultMutableTreeNode(name);
top.add(newnode);
if (!Recurrence(root,newnode)) {
}
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return true;
}
/**
* 遍历xml所有结点
* @param node xml结点
* @param top swing树形结构结点
* @return
*/
private boolean Recurrence(Node node,DefaultMutableTreeNode top){
List<Node> list = getElementNode(node);
DefaultMutableTreeNode snode= null;
if (list.size()==0) {
} else {
for(Node n : list){
NamedNodeMap nGetAttributes = n.getAttributes();
String name = nGetAttributes.getNamedItem("name").getNodeValue();
snode = new DefaultMutableTreeNode(name);
top.add(snode);
if (!Recurrence(n, snode)) {
return false;
}
}
}
return true;
}
/**
* 找到xml结点的子节点
* @param node xml结点
* @return
*/
private List<Node> getElementNode(Node node){
List<Node> list = new LinkedList<Node>();
for (Node n = node.getFirstChild();n!=null;n=n.getNextSibling()) {
if (n.getNodeType()==Node.ELEMENT_NODE) {
list.add(n);
}
}
return list;
}
/**
* 将树形结构保存到xml文件中
* @param root 根节点
* @param fw 输出流
*/
public void saveToFile(DefaultMutableTreeNode root, OutputStreamWriter osw){
try {
osw.write("<node name=\""+root.toString()+"\">\r\n");
for (int i=0; i < root.getChildCount(); i++){
DefaultMutableTreeNode childNode =(DefaultMutableTreeNode)root.getChildAt(i);
saveToFile(childNode, osw);
}
osw.write("</node>\r\n");
}catch (Exception e){
e.printStackTrace();
}
}
public static void main(String[] args) {
TreeFrame mainFrame = new TreeFrame();
mainFrame.setResizable(false);
mainFrame.setVisible(true);
}
}
xml文件结构：
时间： 2024-11-12 01:30:46