Swing完整实例 JTree(右键菜单,可拖拽)+JTable(可翻页,列中含有按钮,隐藏列)

首先来看一下展示界面，JTree的特点有：节点可拖拽，根据输入生成目录，右键有菜单，点击触发事件等

JTable的特点有：含有隐藏列，可以进行翻页，列中含有下载按钮等

在来看一下代码吧，基本代码由Eclipse上的WindowBuilder进行拖拽式产生的，所以看起来有点乱，不过没事

在使用WindowBuilder的时候要画JTree和JTable时要注意，这两个有几个共同点，必须放到JScrollPanel中，因为这两个控件的内容长度会发生突然变化，所以要使用JScrollPanel。

BTW：如果要使用WindowBuidler，除了在Eclipse上安装插件，最方便的方法是直接下载含有该插件的Eclipse版本：

https://www.360docs.net/doc/3e15693518.html,/downloads/packages/eclipse-ide-java-developers/keplerr

package test;

import java.awt.BorderLayout;

import https://www.360docs.net/doc/3e15693518.html,ponent;

import java.awt.EventQueue;

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.Insets;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.util.List;

import javax.swing.AbstractAction;

import javax.swing.DefaultCellEditor;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JPopupMenu;

import javax.swing.JScrollPane;

import javax.swing.JTabbedPane;

import javax.swing.JTable;

import javax.swing.JTextField;

import javax.swing.JTree;

import javax.swing.border.EmptyBorder;

import javax.swing.table.AbstractTableModel;

import javax.swing.table.TableCellRenderer;

import javax.swing.tree.DefaultMutableTreeNode;

public class InnerDocsMgt extends JFrame {

private static final long serialVersionUID = 1L;

private JPanel contentPane;

private JTable table;

private JTree tree;

private JLabel currentDirLabel;

private JLabel totalFilesNumLabel;

private List docFils;

private final int maxFilesAPage = 50;

private JLabel curPageLabel;

private int curPageNum = 0;

/**

* Launch the application.

*/

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

InnerDocsMgt frame = new InnerDocsMgt();

frame.setVisible(true);

} catch (Exception e) {

e.printStackTrace();

}

}

});

}

/**

* Create the frame.

*/

public InnerDocsMgt() {

setTitle("\u5185\u90E8\u8D44\u6599\u7BA1\u7406");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 450, 300);

this.setSize(800, 600);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

contentPane.setLayout(new BorderLayout(0, 0));

setContentPane(contentPane);

JPanel panel = new JPanel();

contentPane.add(panel, BorderLayout.WEST);

GridBagLayout gbl_panel = new GridBagLayout();

gbl_panel.columnWidths = new int[] { 54, 0, 0, 0, 0, 0, 0, 0 };

gbl_panel.rowHeights = new int[] { 31, 0, 0 };

gbl_panel.columnWeights = new double[] { 1.0, 0.0, 0.0, 0.0, 0.0, 0.0,

0.0, Double.MIN_VALUE };

gbl_panel.rowWeights = new double[] { 0.0, 1.0, Double.MIN_VALUE };

panel.setLayout(gbl_panel);

JLabel lblNewLabel = new JLabel(

"\u5185\u90E8\u8D44\u6599\u76EE\u5F55\u5217\u8868"); GridBagConstraints gbc_lblNewLabel = new GridBagConstraints();

gbc_lblNewLabel.gridwidth = 5;

gbc_lblNewLabel.insets = new Insets(0, 0, 5, 5);

gbc_lblNewLabel.gridx = 0;

gbc_lblNewLabel.gridy = 0;

panel.add(lblNewLabel, gbc_lblNewLabel);

JButton button_4 = new JButton("\u4FDD\u5B58\u76EE\u5F55\u64CD\u4F5C"); GridBagConstraints gbc_button_4 = new GridBagConstraints();

gbc_button_4.insets = new Insets(0, 0, 5, 5);

gbc_button_4.gridx = 5;

gbc_button_4.gridy = 0;

panel.add(button_4, gbc_button_4);

JScrollPane scrollPane = new JScrollPane();

GridBagConstraints gbc_scrollPane = new GridBagConstraints();

gbc_scrollPane.gridwidth = 7;

gbc_scrollPane.fill = GridBagConstraints.BOTH;

gbc_scrollPane.gridx = 0;

gbc_scrollPane.gridy = 1;

panel.add(scrollPane, gbc_scrollPane);

DefaultMutableTreeNode top = new DefaultMutableTreeNode("/");

createNodes(top);

tree = new JTree(top);

scrollPane.setViewportView(tree);

tree.setEditable(true);

tree.setDragEnabled(true);

this.setPopupMenu();

try {

tree.setTransferHandler(new DocsTreeTransferHanlder());

} catch (ClassNotFoundException e) {

e.printStackTrace();

}

JPanel panel_1 = new JPanel();

contentPane.add(panel_1, BorderLayout.CENTER);

GridBagLayout gbl_panel_1 = new GridBagLayout();

gbl_panel_1.columnWidths = new int[] { 708, 0 };

gbl_panel_1.rowHeights = new int[] { 556, 0 };

gbl_panel_1.columnWeights = new double[] { 1.0, Double.MIN_VALUE };

gbl_panel_1.rowWeights = new double[] { 1.0, Double.MIN_VALUE };

panel_1.setLayout(gbl_panel_1);

JTabbedPane tabbedPane = new JTabbedPane(JTabbedPane.TOP);

GridBagConstraints gbc_tabbedPane = new GridBagConstraints();

gbc_tabbedPane.fill = GridBagConstraints.BOTH;

gbc_tabbedPane.gridx = 0;

gbc_tabbedPane.gridy = 0;

panel_1.add(tabbedPane, gbc_tabbedPane);

JPanel panel_2 = new JPanel();

tabbedPane.addTab("\u6587\u4EF6\u4E0E\u76EE\u5F55\u7BA1\u7406", null,

panel_2, null);

GridBagLayout gbl_panel_2 = new GridBagLayout();

gbl_panel_2.columnWidths = new int[] { 166, 59, 0, 0, 0, 0, 0 };

gbl_panel_2.rowHeights = new int[] { 30, 0, 49, 0, 0, 0 };

gbl_panel_2.columnWeights = new double[] { 1.0, 0.0, 0.0, 0.0, 0.0,

0.0, Double.MIN_VALUE };

gbl_panel_2.rowWeights = new double[] { 0.0, 0.0, 1.0, 0.0, 0.0,

Double.MIN_VALUE };

panel_2.setLayout(gbl_panel_2);

currentDirLabel = new JLabel(

"\u5F53\u524D\u76EE\u5F55\uFF1Aone->two->three"); GridBagConstraints gbc_lblonetwothree = new GridBagConstraints();

gbc_lblonetwothree.gridwidth = 6;

gbc_lblonetwothree.anchor = GridBagConstraints.WEST;

gbc_lblonetwothree.insets = new Insets(0, 0, 5, 0);

gbc_lblonetwothree.gridx = 0;

gbc_lblonetwothree.gridy = 0;

panel_2.add(currentDirLabel, gbc_lblonetwothree);

JButton button_3 = new JButton("\u5168\u9009/\u5168\u4E0D\u9009"); GridBagConstraints gbc_button_3 = new GridBagConstraints();

gbc_button_3.insets = new Insets(0, 0, 5, 5);

gbc_button_3.gridx = 3;

gbc_button_3.gridy = 1;

panel_2.add(button_3, gbc_button_3);

JButton button = new JButton("\u5220\u9664");

GridBagConstraints gbc_button = new GridBagConstraints();

gbc_button.insets = new Insets(0, 0, 5, 5);

gbc_button.gridx = 4;

gbc_button.gridy = 1;

panel_2.add(button, gbc_button);

JButton button_1 = new JButton("\u79FB\u52A8\u5230");

button_1.setToolTipText("\u8BF7\u5148\u9009\u62E9\u8981\u79FB\u52A8\u7684\u6587\u4EF6\uFF0C\u7136\u540E\u518D\u9009\u62E9\u 4E00\u4E2A\u5DE6\u4FA7\u76EE\u5F55");

GridBagConstraints gbc_button_1 = new GridBagConstraints();

gbc_button_1.insets = new Insets(0, 0, 5, 0);

gbc_button_1.gridx = 5;

gbc_button_1.gridy = 1;

panel_2.add(button_1, gbc_button_1);

JScrollPane scrollPane_1 = new JScrollPane();

GridBagConstraints gbc_scrollPane_1 = new GridBagConstraints();

gbc_scrollPane_1.gridwidth = 6;

gbc_scrollPane_1.insets = new Insets(0, 0, 5, 0);

gbc_scrollPane_1.fill = GridBagConstraints.BOTH;

gbc_scrollPane_1.gridx = 0;

gbc_scrollPane_1.gridy = 2;

panel_2.add(scrollPane_1, gbc_scrollPane_1);

String[] headNames = new String[] { "\u9009\u62E9",

"\u6587\u4EF6\u540D", "\u5927\u5C0F\uFF08KB\uFF09",

"\u6587\u4EF6\u65E5\u671F", "\u4F5C\u8005", "", "\u4E0B\u8F7D" };

Object[][] tableDatas = new Object[50][7];

for (int i = 0; i < 50; i++) {

for (int j = 0; j < 7; j++) {

tableDatas[i][j] = null;

}

}

table = new JTable(new DocsTableModel(headNames, tableDatas));

table.getColumnModel().getColumn(0)

.setCellEditor(table.getDefaultEditor(Boolean.class));

table.getColumnModel().getColumn(0)

.setCellRenderer(table.getDefaultRenderer(Boolean.class)); table.getColumnModel().getColumn(0).setPreferredWidth(38);

table.getColumnModel().getColumn(1).setPreferredWidth(206);

table.getColumnModel().getColumn(2).setPreferredWidth(53);

table.getColumnModel().getColumn(3).setPreferredWidth(134);

table.getColumnModel().getColumn(4).setPreferredWidth(58);

// hide the 5th column,it contans the filepath

table.getTableHeader().getColumnModel().getColumn(5).setMaxWidth(0);// hide

table.getTableHeader().getColumnModel().getColumn(5).setMinWidth(0);// hide

table.getTableHeader().getColumnModel().getColumn(5)

.setPreferredWidth(0);

table.getTableHeader().getColumnModel().getColumn(5).setWidth(0);

table.getColumnModel().getColumn(6)

.setCellRenderer(new ButtonCellRenderer());

table.getColumnModel().getColumn(6)

.setCellEditor(new ButtonCellEditor(table));

scrollPane_1.setViewportView(table);

totalFilesNumLabel = new JLabel("\u6587\u4EF6\u603B\u6570\uFF1A0");

GridBagConstraints gbc_totalFilesNumLabel = new GridBagConstraints();

gbc_totalFilesNumLabel.anchor = GridBagConstraints.WEST;

gbc_totalFilesNumLabel.insets = new Insets(0, 0, 0, 5);

gbc_totalFilesNumLabel.gridx = 0;

gbc_totalFilesNumLabel.gridy = 4;

panel_2.add(totalFilesNumLabel, gbc_totalFilesNumLabel);

curPageLabel = new JLabel(

"\u5F53\u524D\u9875\u6570\uFF1A0| \u603B\u9875\u6570\uFF1A0"); GridBagConstraints gbc_curPageLabel = new GridBagConstraints();

gbc_curPageLabel.gridwidth = 2;

gbc_curPageLabel.insets = new Insets(0, 0, 0, 5);

gbc_curPageLabel.gridx = 2;

gbc_curPageLabel.gridy = 4;

panel_2.add(curPageLabel, gbc_curPageLabel);

JButton btnNewButton = new JButton("\u4E0A\u4E00\u9875");

btnNewButton.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

prePage();

}

});

GridBagConstraints gbc_btnNewButton = new GridBagConstraints();

gbc_btnNewButton.insets = new Insets(0, 0, 0, 5);

gbc_btnNewButton.gridx = 4;

gbc_btnNewButton.gridy = 4;

panel_2.add(btnNewButton, gbc_btnNewButton);

JButton button_2 = new JButton("\u4E0B\u4E00\u9875");

button_2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

nextPage();

}

});

GridBagConstraints gbc_button_2 = new GridBagConstraints();

gbc_button_2.gridx = 5;

gbc_button_2.gridy = 4;

panel_2.add(button_2, gbc_button_2);

JPanel panel_3 = new JPanel();

tabbedPane.addTab("\u7F16\u8F91\u6587\u6863", null, panel_3, null);

GridBagLayout gbl_panel_3 = new GridBagLayout();

gbl_panel_3.columnWidths = new int[] { 0 };

gbl_panel_3.rowHeights = new int[] { 0 };

gbl_panel_3.columnWeights = new double[] { Double.MIN_VALUE };

gbl_panel_3.rowWeights = new double[] { Double.MIN_VALUE };

panel_3.setLayout(gbl_panel_3);

}

private void createNodes(DefaultMutableTreeNode top) {

List nodes = DocsMgtRmi.getINS()

.getFirstLevelDirs();

for (DefaultMutableTreeNode one : nodes) {

top.add(one);

}

}

public void setPopupMenu() {

final JPopupMenu pop = new JPopupMenu();

pop.add(new AbstractAction("添加子目录") {

private static final long serialVersionUID = 1L;

public void actionPerformed(ActionEvent e) {

System.out.println("Tree Add");

}

});

pop.add(new AbstractAction("删除目录") {

private static final long serialVersionUID = 1L;

public void actionPerformed(ActionEvent e) {

System.out.println("Delete");

}

});

tree.addMouseListener(new MouseAdapter() {

@Override

public void mouseReleased(MouseEvent e) {

if (e.isMetaDown()) {

pop.show(tree, e.getX(), e.getY());

}

}

public void mouseClicked(MouseEvent evt) {

if (evt.getClickCount() == 1) {

VEachDir eDir = (VEachDir) getSelectedNode()

.getUserObject();

docFils = DocsMgtRmi.getINS().getFilesViaDirid(

eDir.getDirId());

int filesNum = docFils.size();

currentDirLabel

.setText("\u5F53\u524D\u76EE\u5F55\uFF1Aone->two->three,=>DirID:"

+ eDir.getDirId());

totalFilesNumLabel.setText("\u6587\u4EF6\u603B\u6570\uFF1A"

+ filesNum);

int maxNum = Math.min(maxFilesAPage, filesNum);

if (filesNum <= maxFilesAPage) {

curPageLabel

.setText("\u5F53\u524D\u9875\u6570\uFF1A 1 | \u603B\u9875\u6570\uFF1A 1");

} else {

int totalNum = filesNum / maxFilesAPage;

if (totalNum * maxFilesAPage < filesNum) {

totalNum++;

}

curPageLabel

.setText("\u5F53\u524D\u9875\u6570\uFF1A 1 | \u603B\u9875\u6570\uFF1A "

+ totalNum);

}

curPageNum = 0;

setDocTableValues(docFils.subList(0, maxNum));

}

}

});

}

public void prePage() {

if (this.curPageNum <= 0) {

return;

}

int filesNum = docFils.size();

curPageNum--;

int totalPage = filesNum / maxFilesAPage;

if (totalPage * maxFilesAPage < filesNum) {

totalPage++;

}

curPageLabel

.setText("\u5F53\u524D\u9875\u6570\uFF1A " + (curPageNum + 1)

+ " | \u603B\u9875\u6570\uFF1A " + totalPage);

setDocTableValues(docFils.subList(curPageNum * maxFilesAPage,

Math.min((curPageNum + 1) * maxFilesAPage, filesNum)));

}

public void nextPage() {

int filesNum = docFils.size();

int totalPage = filesNum / maxFilesAPage;

if (totalPage * maxFilesAPage < filesNum) {

totalPage++;

}

if (curPageNum >= totalPage - 1) {

return;

}

curPageNum++;

setDocTableValues(docFils.subList(curPageNum * maxFilesAPage,

Math.min((curPageNum + 1) * maxFilesAPage, filesNum)));

curPageLabel

.setText("\u5F53\u524D\u9875\u6570\uFF1A " + (curPageNum + 1)

+ " | \u603B\u9875\u6570\uFF1A " + totalPage); }

public void setDocTableValues(List subDocs) {

int i = 0;

for (; i < subDocs.size(); i++) {

table.getModel().setValueAt(false, i, 0);

table.getModel().setValueAt(subDocs.get(i).getFileName(), i, 1);

table.getModel().setValueAt(subDocs.get(i).getFileSize(), i, 2);

table.getModel().setValueAt(

subDocs.get(i).getFileDate().toLocaleString(), i, 3);

table.getModel().setValueAt(subDocs.get(i).getFileAuthor(), i, 4);

table.getModel().setValueAt(subDocs.get(i).getFilePath(), i, 5);

}

if (subDocs.size() < maxFilesAPage) {

for (; i < maxFilesAPage; i++) {

table.getModel().setValueAt(false, i, 0);

table.getModel().setValueAt(null, i, 1);

table.getModel().setValueAt(null, i, 2);

table.getModel().setValueAt(null, i, 3);

table.getModel().setValueAt(null, i, 4);

table.getModel().setValueAt(null, i, 5);

}

}

table.updateUI();

table.repaint();

}

public DefaultMutableTreeNode getSelectedNode() {

return (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();

}

class DocsTableModel extends AbstractTableModel {

private String headName[];

private Object obj[][];

private Class[] columnTypes = new Class[] { Boolean.class,

Object.class, Object.class, Object.class, Object.class,

Object.class, Object.class };

public DocsTableModel() {

super();

}

public DocsTableModel(String[] headName, Object[][] obj) {

this();

this.headName = headName;

this.obj = obj;

}

public int getColumnCount() {

return headName.length;

}

public int getRowCount() {

return obj.length;

}

public Object getValueAt(int r, int c) {

return obj[r][c];

}

public String getColumnName(int c) {

return headName[c];

}

public Class getColumnClass(int columnIndex) {

return columnTypes[columnIndex].getClass();

}

@Override

public boolean isCellEditable(int rowIndex, int columnIndex) {

return true;

}

public void setValueAt(Object value, int row, int col) {

obj[row][col] = value;

fireTableCellUpdated(row, col);

}

}

}

class ButtonCellEditor extends DefaultCellEditor {

private static final long serialVersionUID = -6546334664166791132L;

private JButton button;

private JTable table;

public ButtonCellEditor(JTable table) {

super(new JTextField());

this.setClickCountToStart(1);

this.initButton();

this.table = table;

}

private void initButton() {

this.button = new JButton();

this.button.setSize(50, 15);

this.button.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

ButtonCellEditor.this.fireEditingCanceled();

System.out.println("Selected Column:"

+ table.getSelectedColumn()

+ ",row:"

+ table.getSelectedRow()

+ ",and filePath:"

+ table.getModel()

.getValueAt(table.getSelectedRow(), 5));

}

});

}

@Override

public Component getTableCellEditorComponent(JTable table, Object value,

boolean isSelected, int row, int column) {

this.button.setText("下载");

return this.button;

}

@Override

public Object getCellEditorValue() {

return this.button.getText();

}

}

class ButtonCellRenderer implements TableCellRenderer {

private JButton button;

public ButtonCellRenderer() {

this.button = new JButton();

}

public Component getTableCellRendererComponent(JTable table, Object value,

boolean isSelected, boolean hasFocus, int row, int column) {

this.button.setText("下载");

return this.button;

}

}

关于上面的TableCellRenderer子类和CellEditor子类，这两个都被设置到table的ColumnModel中了，ButtonCellRenderer在每次GUI渲染的时候都会调用，ButtonCellEditor只会在点击到这个Cell的时候才会调用，并且如果失去焦点后return的Component将消失，所以ButtonCellRenderer这个很重要。table.getColumnModel().getColumn(7).setCellRenderer(new ButtonCellRenderer());table.getColumnModel().getColumn(7).setCellEditor(new ButtonCellEditor(table));

可以在ButtonCellRenderer中加上一些逻辑，用来判断是否显示按钮，比如在初始化的时候不要显示按钮，比如可以可以根据隐藏列的值显示按钮，只要修改getTableRenderComponent方法即可。

public Component getTableCellRendererComponent(JTable table, Object value,

boolean isSelected, boolean hasFocus, int row, int column) {

String filePath = (String) table.getModel().getValueAt(row, 7);

if (filePath == null) {

return null;

} else {

this.button.setText("下载");

return this.button;

}

}

下面讲一下支持Tree拖拽的事件响应器DocsTreeTransferHanlder，TransferHanlder用来处理Transferable一个Swing Component对象上的transfer to和from，就是拖拽，而Transferable对象代表通过剪切到，拷贝自剪贴板上的数据对象。

这几个对象被用来实现拖拽，TansferHanlder对拖拽支持良好，开发者只需要实现一个具体的Transfer对象，然后将hanlder设置到Swing组件上。

Please see How to Use Drag and Drop and Data Transfer, a section in The Java Tutorial, for more information.

简单的说，通过TransferHandler来实现拖拽，首先要创建Transferable对象JTreeTransferable，然后比较重要的是ImportData和exportDone方法，在importData方法中可以通过Support对象获取DropLocation，然后通过TreePath的getLastPathComponent方法得到拖拽的目标Tree对象结点，继而通过getUserObject可以获得之前自定义的放到TreeNode的用户数据，如下面下面四句：

JTree.DropLocation location = (JTree.DropLocation) support.getDropLocation();

DefaultMutableTreeNode newParent = (DefaultMutableTreeNode) location.getPath().getLastPathComponent();

VEachDir eDir = (VEachDir) newParent.getUserObject();

System.out.println("The drage after NewParent DirName:"+ eDir.getDirName() + ",DirID:" + eDir.getDirId());

显然按照之前的理论Transfer中放置的是被移动的对象，则通过下面的两句就可以得到被移动对象的结点列表，要注意的是这个地方是列表，即表示拖拽时可以使用Shift来选择多个结点进行拖拽到一个目标结点！

Transferable transfer = support.getTransferable();

List nodes = (List) transfer.getTransferData(JTreeTransferable.FLAVOR);

由此可见通过拖拽过程的实现，最重要的一个类是TransferHandler.TransferSupport 类，这个类中包含了目的树节点和源节点列表，最重要的是，我们可以不用丝毫关心Support怎么做到的，只要记住怎么获取源和目的就行了。

当然在拖拽之前，实现TranseferHanlder最重要的就是创建自己的Transferable对象，这个其实也比较简单，就两点（1）创建Favor （2）塞入TreeNodes 就可以了

由此可见Swing实现JTree的拖拽非常强大吧！

package test;

import java.awt.datatransfer.DataFlavor;

import java.awt.datatransfer.Transferable;

import java.awt.datatransfer.UnsupportedFlavorException;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import javax.swing.JComponent;

import javax.swing.JTree;

import javax.swing.TransferHandler;

import javax.swing.tree.DefaultMutableTreeNode;

import javax.swing.tree.DefaultTreeModel;

import javax.swing.tree.TreePath;

import com.car.cs.pojodata.VEachDir;

public class DocsTreeTransferHanlder extends TransferHandler {

private static final long serialVersionUID = 1910170308494195795L;

public int getSourceActions(JComponent c) {

return MOVE;

}

@Override

protected Transferable createTransferable(JComponent c) {

JTree tree = (JTree) c;

TreePath[] paths = tree.getSelectionPaths();

ArrayList nodes = new ArrayList();

for (TreePath path : paths) {

nodes.add(path.getLastPathComponent());

}

return new JTreeTransferable(nodes);

}

@Override

protected void exportDone(JComponent source, Transferable data, int action) {

}

@Override

public boolean canImport(TransferSupport support) {

if (support.isDataFlavorSupported(JTreeTransferable.FLAVOR)) {

if (support.getDropAction() == MOVE)

return true;

}

return false;

}

@Override

public boolean importData(TransferSupport support) {

System.out.println("ImportData");

JTree tree = (JTree) support.getComponent();

DefaultTreeModel model = (DefaultTreeModel) tree.getModel();

Transferable transfer = support.getTransferable();

try {

List nodes = (List) transfer

.getTransferData(JTreeTransferable.FLAVOR);

JTree.DropLocation location = (JTree.DropLocation) support

.getDropLocation();

DefaultMutableTreeNode newParent = (DefaultMutableTreeNode) location

.getPath().getLastPathComponent();

VEachDir eDir = (VEachDir) newParent.getUserObject();

System.out.println("The drage after NewParent DirName:"

+ eDir.getDirName() + ",DirID:" + eDir.getDirId());

for (DefaultMutableTreeNode node : nodes) {

eDir = (VEachDir) node.getUserObject();

System.out.println("Before Drag the Node DirName:"

+ eDir.getDirName());

model.removeNodeFromParent(node);

model.insertNodeInto(node, newParent, newParent.getChildCount());

}

} catch (UnsupportedFlavorException e) {

e.printStackTrace();

return false;

} catch (Exception e) {

e.printStackTrace();

return false;

}

return true;

}

}

class JTreeTransferable implements Transferable {

public static DataFlavor FLAVOR = null;

private List nodes;

public JTreeTransferable(ArrayList nodes) {

try {

FLAVOR = new DataFlavor(DataFlavor.javaJVMLocalObjectMimeType

+ ";class=\"" + ArrayList.class.getName() + "\"");

this.nodes = nodes;

} catch (Exception ex) {

ex.printStackTrace();

}

}

public Object getTransferData(DataFlavor flavor)

throws UnsupportedFlavorException, IOException {

return nodes;

}

public DataFlavor[] getTransferDataFlavors() {

return new DataFlavor[] { FLAVOR };

}

public boolean isDataFlavorSupported(DataFlavor flv) {

return FLAVOR.equals(flv);

}

}

其中里面用到的制造数据的DocsMgtRmi类，和里面用到的两个POJO对象VEachDir和VEachFile。

package test;

import https://www.360docs.net/doc/3e15693518.html,.MalformedURLException;

import java.util.ArrayList;

import java.util.Date;

import java.util.List;

import javax.swing.tree.DefaultMutableTreeNode;

import org.apache.log4j.Logger;

public class DocsMgtRmi {

private final Logger logger = Logger.getLogger(DocsMgtRmi.class);

private static DocsMgtRmi rmi = null;

public static DocsMgtRmi getINS() {

if (rmi == null) {

synchronized (DocsMgtRmi.class) {

if (rmi == null) {

rmi = new DocsMgtRmi();

}

}

}

return rmi;

}

private DocsMgtRmi() {

}

public List getFirstLevelDirs() {

ArrayList nodes = new ArrayList();

DefaultMutableTreeNode fstnode = null;

for (int i = 0; i < 10; i++) {

VEachDir fstLevelDir = new VEachDir(i, "200" + i + "年以前规章", 0);

fstnode = new DefaultMutableTreeNode(fstLevelDir);

nodes.add(fstnode);

}

for (int i = 0; i < 10; i++) {

VEachDir secLevelDir = new VEachDir(i, "2009年投诉建议-卷" + i, 9);

DefaultMutableTreeNode secNode = new DefaultMutableTreeNode(

secLevelDir);

fstnode.add(secNode);

}

return nodes;

}

public List getFilesViaDirid(int dirId) {

ArrayList files = new ArrayList();

for (int i = 0; i < 97; i++) {

VEachFile one = new VEachFile(dirId, "天上星，亮晶晶，那是" + i + "双双眼睛.txt",

1000, new Date(), "张为山", "one->two-" + i + "-<>");

files.add(one);

}

return files;

}

public boolean saveDirChanged(List dirs) {

return true;

}

}

两个实体类VEachFile和VEachDir

package test;

import java.util.Date;

public class VEachFile {

private int dirId;

private String fileName;

private int fileSize;

private Date fileDate;

private String fileAuthor;

private String filePath;

public VEachFile(int dirId, String fileName, int fileSize, Date fileDate,

String fileAuthor, String filePath) {

super();

this.dirId = dirId;

this.fileName = fileName;

this.fileSize = fileSize;

this.fileDate = fileDate;

this.fileAuthor = fileAuthor;