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我們?cè)诙辔募螺d或多事務(wù)處理時(shí)，經(jīng)常會(huì)出現(xiàn)使用線程以提高效率的情況，而這時(shí)在GUI程序中如何表示進(jìn)度，就成了一個(gè)不大不小的問題。
現(xiàn)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(jìn)度條以進(jìn)行顯示。
而對(duì)于Swing來說，并沒有現(xiàn)成的組件能夠?qū)崿F(xiàn)這一操作，還有下載的并發(fā)，似乎也需要額外進(jìn)行處理。于是，我在此提供一個(gè)基于jdk1.6版本的示例，以供參考。（因?yàn)閖dk1.6提供了SwingWorker，簡化了圖形程序中的線程處理，使用其他jdk開發(fā)請(qǐng)?zhí)鎿Q此項(xiàng)即可）

本示例由兩個(gè)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(jìn)度 " ,Integer. class , false )} ;

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

private int number = 0 ;

public void addTest(Testt,SwingWorkerworker) {

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

super .addRow(obj);

swmap.put(number,worker);

number ++ ;

}

public synchronized SwingWorkergetSwingWorker( int identifier) {

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

return swmap.get(key);

}

public TestgetTest( 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 StringgetColumnName( int modelIndex) {

return columnArray[modelIndex].columnName;

}

private static class ColumnContext {

public final StringcolumnName;

public final ClasscolumnClass;

public final boolean isEditable;

public ColumnContext(StringcolumnName,ClasscolumnClass,

boolean isEditable) {

this .columnName = columnName;

this .columnClass = columnClass;

this .isEditable = isEditable;

}

class Test {

private Stringname;

private Integerprogress;

public Test(Stringname,Integerprogress) {

this .name = name;

this .progress = progress;

}

public void setName(Stringstr) {

name = str;

}

public void setProgress(Integerstr) {

progress = str;

}

public StringgetName() {

return name;

}

public IntegergetProgress() {

return progress;

}

class ProgressRenderer extends DefaultTableCellRenderer {

/**

private static final long serialVersionUID = 1L ;

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

public ProgressRenderer() {

super ();

setOpaque( true );

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

}

public ComponentgetTableCellRendererComponent(JTabletable,Objectvalue,

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

Integeri = (Integer)value;

Stringtext = " 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;

// importorg.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 ColorevenColor = new Color( 250 , 250 , 250 );

private final MyTableModelmodel = new MyTableModel();

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

model);

private final JTabletable;

public MyPanel() {

super ( new BorderLayout());

table = new JTable(model) {

/**

private static final long serialVersionUID = 1L ;

public ComponentprepareRenderer(

TableCellRenderertableCellRenderer, int row, int column) {

Componentcomponent = super .prepareRenderer(tableCellRenderer,row,

column);

// 背景色及字體設(shè)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 JPopupMenugetComponentPopupMenu() {

return makePopup();

}

} ;

table.setRowSorter(sorter);

model.addTest( new Test( " 進(jìn)度條測(cè)試 " , 100 ), null );

// 滾動(dòng)條

JScrollPanescrollPane = 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(shè)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(shí)重新定義焦點(diǎn)，避免TableCellEditor丟失數(shù)據(jù)

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

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

TableColumncolumn = 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(Stringlabel,Iconicon) {

super (label,icon);

}

public void actionPerformed(ActionEventevt) {

createNewActionPerformed(evt);

}

/**

*創(chuàng)建事件

* @param evt

private void createNewActionPerformed(ActionEventevt) {

final int key = model.getRowCount();

// 在jdk1.6后，當(dāng)一個(gè)Swing程序需要執(zhí)行一個(gè)多線程任務(wù)時(shí)，可以通過javax.swing.SwingWorker實(shí)例進(jìn)行實(shí)現(xiàn)。

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

// SwingWorker的done方法，在后臺(tái)任務(wù)完成時(shí)自動(dòng)的在事件調(diào)度線程上被調(diào)用。

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

// 隨機(jī)sleep

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

// 最大任務(wù)數(shù)量

private int taskSize = 200 ;

protected IntegerdoInBackground() {

int current = 0 ;

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

current ++ ;

try {

Thread.sleep(sleepDummy);

} catch (InterruptedExceptionie) {

publish( - 1 );

break ;

}

publish( 100 * current / taskSize);

}

return sleepDummy * taskSize;

}

/**

*進(jìn)行中處理

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

for (Integervalue:data) {

// 把數(shù)據(jù)填入對(duì)應(yīng)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(jìn)度條測(cè)試 " , 0 ),worker);

worker.execute();

}

class CancelAction extends AbstractAction {

/**

private static final long serialVersionUID = 1L ;

public CancelAction(Stringlabel,Iconicon) {

super (label,icon);

}

public void actionPerformed(ActionEventevt) {

cancelActionPerformed(evt);

}

/**

*取消進(jìn)度

* @param evt

public synchronized void cancelActionPerformed(ActionEventevt) {

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]);

SwingWorkerworker = model.getSwingWorker(midx);

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

worker.cancel( true );

}

worker = null ;

}

table.repaint();

}

/**

*取消下載進(jìn)程

* @author chenpeng

class DeleteAction extends AbstractAction {

/**

private static final long serialVersionUID = 1L ;

public DeleteAction(Stringlabel,Iconicon) {

super (label,icon);

}

public void actionPerformed(ActionEventevt) {

deleteActionPerformed(evt);

}

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

public synchronized void deleteActionPerformed(ActionEventevt) {

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);

SwingWorkerworker = 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) {

Integermidx = entry.getIdentifier();

return ! set.contains(midx);

}

} ;

sorter.setRowFilter(filter);

table.repaint();

}

private JPopupMenumakePopup() {

JPopupMenupop = new JPopupMenu();

Actionact = 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() {

JFrameframe = new JFrame( " 在JTable中加載進(jìn)度條及進(jìn)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(yùn)行效果如下：

在JTable中加載進(jìn)度條及進(jìn)行操作

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