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我們在多文件下載或多事務處理時，經常會出現使用線程以提高效率的情況，而這時在GUI程序中如何表示進度，就成了一個不大不小的問題。
現在比較被大眾接受的方式，大體就是如迅雷等下載工具中一樣，用表格中加載進度條以進行顯示。
而對于Swing來說，并沒有現成的組件能夠實現這一操作，還有下載的并發，似乎也需要額外進行處理。于是，我在此提供一個基于jdk1.6版本的示例，以供參考。（因為jdk1.6提供了SwingWorker，簡化了圖形程序中的線程處理，使用其他jdk開發請替換此項即可）

本示例由兩個java文件組成

MyTableModel.java

package org.loon.test;

import java.awt.Component;

import java.util.HashMap;

import java.util.Map;

import javax.swing.BorderFactory;

import javax.swing.JProgressBar;

import javax.swing.JTable;

import javax.swing.SwingWorker;

import javax.swing.table.DefaultTableCellRenderer;

import javax.swing.table.DefaultTableModel;

/**

*

* Title: LoonFramework

*

*

* Description:

*

*

*

*

* Company: LoonFramework

*

* @author chenpeng

* @email：ceponline@yahoo.com.cn

* @version 0.1

public class MyTableModel extends DefaultTableModel {

/**

private static final long serialVersionUID = 1L;

private static final ColumnContext[] columnArray = {

new ColumnContext("ID", Integer.class, false),

new ColumnContext("名稱", String.class, false),

new ColumnContext("進度", Integer.class, false) };

private final Map<Integer, SwingWorker> swmap = new HashMap<Integer, SwingWorker>();

private int number = 0;

public void addTest(Test t, SwingWorker worker) {

Object[] obj = { new Integer(number), t.getName(), t.getProgress() };

super.addRow(obj);

swmap.put(number, worker);

number++;

}

public synchronized SwingWorker getSwingWorker(int identifier) {

Integer key = (Integer) getValueAt(identifier, 0);

return swmap.get(key);

}

public Test getTest(int identifier) {

return new Test((String) getValueAt(identifier, 1),

(Integer) getValueAt(identifier, 2));

}

public boolean isCellEditable(int row, int col) {

return columnArray[col].isEditable;

}

public Class<?> getColumnClass(int modelIndex) {

return columnArray[modelIndex].columnClass;

}

public int getColumnCount() {

return columnArray.length;

}

public String getColumnName(int modelIndex) {

return columnArray[modelIndex].columnName;

}

private static class ColumnContext {

public final String columnName;

public final Class columnClass;

public final boolean isEditable;

public ColumnContext(String columnName, Class columnClass,

boolean isEditable) {

this.columnName = columnName;

this.columnClass = columnClass;

this.isEditable = isEditable;

}

class Test {

private String name;

private Integer progress;

public Test(String name, Integer progress) {

this.name = name;

this.progress = progress;

}

public void setName(String str) {

name = str;

}

public void setProgress(Integer str) {

progress = str;

}

public String getName() {

return name;

}

public Integer getProgress() {

return progress;

}

class ProgressRenderer extends DefaultTableCellRenderer {

/**

private static final long serialVersionUID = 1L;

private final JProgressBar b = new JProgressBar(0, 100);

public ProgressRenderer() {

super();

setOpaque(true);

b.setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 1));

}

public Component getTableCellRendererComponent(JTable table, Object value,

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

Integer i = (Integer) value;

String text = "完成";

if (i < 0) {

//刪除

text = "取消完畢";

} else if (i < 100) {

b.setValue(i);

return b;

}

super.getTableCellRendererComponent(table, text, isSelected, hasFocus,

row, column);

return this;

}

MyPanel.java

package org.loon.test;

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Component;

import java.awt.Dimension;

import java.awt.EventQueue;

import java.awt.event.ActionEvent;

import java.util.HashSet;

import java.util.Random;

import javax.swing.AbstractAction;

import javax.swing.Action;

import javax.swing.Icon;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JPopupMenu;

import javax.swing.JScrollPane;

import javax.swing.JSeparator;

import javax.swing.JTable;

import javax.swing.RowFilter;

import javax.swing.SwingWorker;

import javax.swing.WindowConstants;

import javax.swing.table.TableCellRenderer;

import javax.swing.table.TableColumn;

import javax.swing.table.TableRowSorter;

//import org.loon.framework.dll.NativeLoader;

/**

*

* Title: LoonFramework

*

*

* Description:

*

*

*

*

* Company: LoonFramework

*

* @author chenpeng

* @email：ceponline@yahoo.com.cn

* @version 0.1

public class MyPanel extends JPanel {

/**

private static final long serialVersionUID = 1L;

private static final Color evenColor = new Color(250, 250, 250);

private final MyTableModel model = new MyTableModel();

private final TableRowSorter<MyTableModel> sorter = new TableRowSorter<MyTableModel>(

model);

private final JTable table;

public MyPanel() {

super(new BorderLayout());

table = new JTable(model) {

/**

private static final long serialVersionUID = 1L;

public Component prepareRenderer(

TableCellRenderer tableCellRenderer, int row, int column) {

Component component = super.prepareRenderer(tableCellRenderer, row,

column);

//背景色及字體設置

if (isRowSelected(row)) {

component.setForeground(getSelectionForeground());

component.setBackground(getSelectionBackground());

} else {

component.setForeground(getForeground());

component.setBackground((row % 2 == 0) ? evenColor : table

.getBackground());

}

return component;

}

public JPopupMenu getComponentPopupMenu() {

return makePopup();

}

};

table.setRowSorter(sorter);

model.addTest(new Test("進度條測試", 100), null);

// 滾動條

JScrollPane scrollPane = new JScrollPane(table);

// 背景色

scrollPane.getViewport().setBackground(Color.black);

// 彈出菜單

table.setComponentPopupMenu(new JPopupMenu());

// 是否始終大到足以填充封閉視口的高度

table.setFillsViewportHeight(true);

// 將單元格間距的高度和寬度設置為指定的Dimension

table.setIntercellSpacing(new Dimension());

// 是否繪制單元格間的水平線

table.setShowHorizontalLines(true);

// 是否繪制單元格間的垂直線

table.setShowVerticalLines(false);

// 停止編輯時重新定義焦點，避免TableCellEditor丟失數據

table.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);

// 表示JTable中列的所有屬性，如寬度、大小可調整性、最小和最大寬度等。

TableColumn column = table.getColumnModel().getColumn(0);

column.setMaxWidth(60);

column.setMinWidth(60);

column.setResizable(false);

column = table.getColumnModel().getColumn(2);

// 繪制此列各值的TableCellRenderer

column.setCellRenderer(new ProgressRenderer());

// 添加按鈕

add(new JButton(new CreateNewAction("添加", null)), BorderLayout.SOUTH);

add(scrollPane, BorderLayout.CENTER);

setPreferredSize(new Dimension(320, 180));

}

class CreateNewAction extends AbstractAction {

/**

private static final long serialVersionUID = 1L;

public CreateNewAction(String label, Icon icon) {

super(label, icon);

}

public void actionPerformed(ActionEvent evt) {

createNewActionPerformed(evt);

}

/**

* 創建事件

* @param evt

private void createNewActionPerformed(ActionEvent evt) {

final int key = model.getRowCount();

//在jdk1.6后，當一個Swing程序需要執行一個多線程任務時，可以通過javax.swing.SwingWorker實例進行實現。

//SwingWorker的process可以定義約束屬性。更改這些屬性將觸發事件，并從事件調度線程上引起事件處理方法的調用。

//SwingWorker的done方法，在后臺任務完成時自動的在事件調度線程上被調用。

SwingWorker<Integer, Integer> worker = new SwingWorker<Integer, Integer>() {

// 隨機sleep

private int sleepDummy = new Random().nextInt(100) + 1;

// 最大任務數量

private int taskSize = 200;

protected Integer doInBackground() {

int current = 0;

while (current < taskSize && !isCancelled()) {

current++;

try {

Thread.sleep(sleepDummy);

} catch (InterruptedException ie) {

publish(-1);

break;

}

publish(100 * current / taskSize);

}

return sleepDummy * taskSize;

}

/**

* 進行中處理

protected void process(java.util.List<Integer> data) {

for (Integer value : data) {

// 把數據填入對應的行列

model.setValueAt(value, key, 2);

}

// 傳送變更事件給指定行列

model.fireTableCellUpdated(key, 2);

}

/**

* 完成后處理

protected void done() {

}

};

model.addTest(new Test("進度條測試", 0), worker);

worker.execute();

}

class CancelAction extends AbstractAction {

/**

private static final long serialVersionUID = 1L;

public CancelAction(String label, Icon icon) {

super(label, icon);

}

public void actionPerformed(ActionEvent evt) {

cancelActionPerformed(evt);

}

/**

* 取消進度

* @param evt

public synchronized void cancelActionPerformed(ActionEvent evt) {

int[] selection = table.getSelectedRows();

if (selection == null || selection.length <= 0)

return;

for (int i = 0; i < selection.length; i++) {

int midx = table.convertRowIndexToModel(selection[i]);

SwingWorker worker = model.getSwingWorker(midx);

if (worker != null && !worker.isDone()) {

worker.cancel(true);

}

worker = null;

}

table.repaint();

}

/**

* 取消下載進程

* @author chenpeng

class DeleteAction extends AbstractAction {

/**

private static final long serialVersionUID = 1L;

public DeleteAction(String label, Icon icon) {

super(label, icon);

}

public void actionPerformed(ActionEvent evt) {

deleteActionPerformed(evt);

}

private final HashSet<Integer> set = new HashSet<Integer>();

public synchronized void deleteActionPerformed(ActionEvent evt) {

int[] selection = table.getSelectedRows();

if (selection == null || selection.length <= 0)

return;

for (int i = 0; i < selection.length; i++) {

int midx = table.convertRowIndexToModel(selection[i]);

set.add(midx);

SwingWorker worker = model.getSwingWorker(midx);

if (worker != null && !worker.isDone()) {

worker.cancel(true);

}

worker = null;

}

// JTable過濾器

final RowFilter<MyTableModel, Integer> filter = new RowFilter<MyTableModel, Integer>() {

public boolean include(

Entry<? extends MyTableModel, ? extends Integer> entry) {

Integer midx = entry.getIdentifier();

return !set.contains(midx);

}

};

sorter.setRowFilter(filter);

table.repaint();

}

private JPopupMenu makePopup() {

JPopupMenu pop = new JPopupMenu();

Action act = new CreateNewAction("添加", null);

pop.add(act);

act = new CancelAction("取消", null);

int[] selection = table.getSelectedRows();

if (selection == null || selection.length <= 0)

act.setEnabled(false);

pop.add(act);

// 分割線

pop.add(new JSeparator());

act = new DeleteAction("刪除", null);

if (selection == null || selection.length <= 0)

act.setEnabled(false);

pop.add(act);

return pop;

}

public static void main(String[] args) {

EventQueue.invokeLater(new Runnable() {

public void run() {

createGUI();

}

});

}

public static void createGUI() {

JFrame frame = new JFrame("在JTable中加載進度條及進行操作");

frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

frame.getContentPane().add(new MyPanel());

frame.setSize(400, 400);

// 透明度90%

// NativeLoader.getInstance().setTransparence(frame, 0.9f);

// 居中

frame.setLocationRelativeTo(null);

frame.setVisible(true);

}

運行效果如下：

posted on 2007-12-24 16:39 cping 閱讀(389) 評論(0) 收藏舉報

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