在JTable中加载进度条及进行操作

我们在多文件下载或多事务处理时，经常会出现使用线程以提高效率的情况，而这时在GUI程序中如何表示进度，就成了一个不大不小的问题。
现在比较被大众接受的方式，大体就是如迅雷等下载工具中一样，用表格中加载进度条以进行显示。
而对于Swing来说，并没有现成的组件能够实现这一操作，还有下载的并发，似乎也需要额外进行处理。于是，我在此提供一个基于jdk1.6版本的示例，以供参考。（因为jdk1.6提供了SwingWorker，简化了图形程序中的线程处理，使用其他jdk开发请替换此项即可）

本示例由两个java文件组成

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;

/***/ /**
*<p>
*Title:LoonFramework
*</p>
*<p>
*Description:
*</p>
*<p>
*Copyright:Copyright(c)2007
*</p>
*<p>
*Company:LoonFramework
*</p>
*
*@authorchenpeng
*@email：[email protected]
*@version0.1
*/
public class MyTableModel extends DefaultTableModel ... {
/***//**
*
*/
privatestaticfinallongserialVersionUID=1L;

privatestaticfinalColumnContext[]columnArray=...{
newColumnContext("ID",Integer.class,false),
newColumnContext("名称",String.class,false),
newColumnContext("进度",Integer.class,false)};

privatefinalMap<Integer,SwingWorker>swmap=newHashMap<Integer,SwingWorker>();

privateintnumber=0;

publicvoidaddTest(Testt,SwingWorkerworker)...{
Object[]obj=...{newInteger(number),t.getName(),t.getProgress()};
super.addRow(obj);
swmap.put(number,worker);
number++;
}

publicsynchronizedSwingWorkergetSwingWorker(intidentifier)...{
Integerkey=(Integer)getValueAt(identifier,0);
returnswmap.get(key);
}

publicTestgetTest(intidentifier)...{
returnnewTest((String)getValueAt(identifier,1),
(Integer)getValueAt(identifier,2));
}

publicbooleanisCellEditable(introw,intcol)...{
returncolumnArray[col].isEditable;
}


publicClass<?>getColumnClass(intmodelIndex)...{
returncolumnArray[modelIndex].columnClass;
}

publicintgetColumnCount()...{
returncolumnArray.length;
}

publicStringgetColumnName(intmodelIndex)...{
returncolumnArray[modelIndex].columnName;
}

privatestaticclassColumnContext...{
publicfinalStringcolumnName;

publicfinalClasscolumnClass;

publicfinalbooleanisEditable;

publicColumnContext(StringcolumnName,ClasscolumnClass,
booleanisEditable)...{
this.columnName=columnName;
this.columnClass=columnClass;
this.isEditable=isEditable;
}
}
}

class Test ... {
privateStringname;

privateIntegerprogress;

publicTest(Stringname,Integerprogress)...{
this.name=name;
this.progress=progress;
}

publicvoidsetName(Stringstr)...{
name=str;
}

publicvoidsetProgress(Integerstr)...{
progress=str;
}

publicStringgetName()...{
returnname;
}

publicIntegergetProgress()...{
returnprogress;
}
}

class ProgressRenderer extends DefaultTableCellRenderer ... {
/***//**
*
*/
privatestaticfinallongserialVersionUID=1L;
privatefinalJProgressBarb=newJProgressBar(0,100);

publicProgressRenderer()...{
super();
setOpaque(true);
b.setBorder(BorderFactory.createEmptyBorder(1,1,1,1));
}

publicComponentgetTableCellRendererComponent(JTabletable,Objectvalue,
booleanisSelected,booleanhasFocus,introw,intcolumn)...{
Integeri=(Integer)value;
Stringtext="完成";
if(i<0)...{
//删除
text="取消完毕";
}elseif(i<100)...{
b.setValue(i);
returnb;
}
super.getTableCellRendererComponent(table,text,isSelected,hasFocus,
row,column);
returnthis;
}
}

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;

/***/ /**
*<p>
*Title:LoonFramework
*</p>
*<p>
*Description:
*</p>
*<p>
*Copyright:Copyright(c)2007
*</p>
*<p>
*Company:LoonFramework
*</p>
*
*@authorchenpeng
*@email：[email protected]
*@version0.1
*/
public class MyPanel extends JPanel ... {
/***//**
*
*/
privatestaticfinallongserialVersionUID=1L;

privatestaticfinalColorevenColor=newColor(250,250,250);

privatefinalMyTableModelmodel=newMyTableModel();

privatefinalTableRowSorter<MyTableModel>sorter=newTableRowSorter<MyTableModel>(
model);

privatefinalJTabletable;

publicMyPanel()...{
super(newBorderLayout());
table=newJTable(model)...{
/***//**
*
*/
privatestaticfinallongserialVersionUID=1L;

publicComponentprepareRenderer(
TableCellRenderertableCellRenderer,introw,intcolumn)...{
Componentcomponent=super.prepareRenderer(tableCellRenderer,row,
column);
//背景色及字体设置
if(isRowSelected(row))...{
component.setForeground(getSelectionForeground());
component.setBackground(getSelectionBackground());
}else...{
component.setForeground(getForeground());
component.setBackground((row%2==0)?evenColor:table
.getBackground());
}
returncomponent;
}

publicJPopupMenugetComponentPopupMenu()...{
returnmakePopup();
}
};
table.setRowSorter(sorter);
model.addTest(newTest("进度条测试",100),null);

//滚动条
JScrollPanescrollPane=newJScrollPane(table);
//背景色
scrollPane.getViewport().setBackground(Color.black);
//弹出菜单
table.setComponentPopupMenu(newJPopupMenu());
//是否始终大到足以填充封闭视口的高度
table.setFillsViewportHeight(true);
//将单元格间距的高度和宽度设置为指定的Dimension
table.setIntercellSpacing(newDimension());
//是否绘制单元格间的水平线
table.setShowHorizontalLines(true);
//是否绘制单元格间的垂直线
table.setShowVerticalLines(false);
//停止编辑时重新定义焦点，避免TableCellEditor丢失数据
table.putClientProperty("terminateEditOnFocusLost",Boolean.TRUE);
//表示JTable中列的所有属性，如宽度、大小可调整性、最小和最大宽度等。
TableColumncolumn=table.getColumnModel().getColumn(0);
column.setMaxWidth(60);
column.setMinWidth(60);
column.setResizable(false);
column=table.getColumnModel().getColumn(2);
//绘制此列各值的TableCellRenderer
column.setCellRenderer(newProgressRenderer());

//添加按钮
add(newJButton(newCreateNewAction("添加",null)),BorderLayout.SOUTH);
add(scrollPane,BorderLayout.CENTER);
setPreferredSize(newDimension(320,180));
}

classCreateNewActionextendsAbstractAction...{
/***//**
*
*/
privatestaticfinallongserialVersionUID=1L;

publicCreateNewAction(Stringlabel,Iconicon)...{
super(label,icon);
}

publicvoidactionPerformed(ActionEventevt)...{
createNewActionPerformed(evt);
}
}

/***//**
*创建事件
*@paramevt
*/
privatevoidcreateNewActionPerformed(ActionEventevt)...{
finalintkey=model.getRowCount();
//在jdk1.6后，当一个Swing程序需要执行一个多线程任务时，可以通过javax.swing.SwingWorker实例进行实现。
//SwingWorker的process可以定义约束属性。更改这些属性将触发事件，并从事件调度线程上引起事件处理方法的调用。
//SwingWorker的done方法，在后台任务完成时自动的在事件调度线程上被调用。
SwingWorker<Integer,Integer>worker=newSwingWorker<Integer,Integer>()...{
//随机sleep
privateintsleepDummy=newRandom().nextInt(100)+1;

//最大任务数量
privateinttaskSize=200;

protectedIntegerdoInBackground()...{
intcurrent=0;
while(current<taskSize&&!isCancelled())...{
current++;
try...{
Thread.sleep(sleepDummy);
}catch(InterruptedExceptionie)...{
publish(-1);
break;
}
publish(100*current/taskSize);
}
returnsleepDummy*taskSize;
}

/***//**
*进行中处理
*/
protectedvoidprocess(java.util.List<Integer>data)...{
for(Integervalue:data)...{
//把数据填入对应的行列
model.setValueAt(value,key,2);
}
//传送变更事件给指定行列
model.fireTableCellUpdated(key,2);
}

/***//**
*完成后处理
*/
protectedvoiddone()...{
}
};
model.addTest(newTest("进度条测试",0),worker);
worker.execute();
}

classCancelActionextendsAbstractAction...{
/***//**
*
*/
privatestaticfinallongserialVersionUID=1L;

publicCancelAction(Stringlabel,Iconicon)...{
super(label,icon);
}

publicvoidactionPerformed(ActionEventevt)...{
cancelActionPerformed(evt);
}
}

/***//**
*取消进度
*@paramevt
*/
publicsynchronizedvoidcancelActionPerformed(ActionEventevt)...{
int[]selection=table.getSelectedRows();
if(selection==null||selection.length<=0)
return;
for(inti=0;i<selection.length;i++)...{
intmidx=table.convertRowIndexToModel(selection[i]);
SwingWorkerworker=model.getSwingWorker(midx);
if(worker!=null&&!worker.isDone())...{
worker.cancel(true);
}
worker=null;
}
table.repaint();
}

/***//**
*取消下载进程
*
*@authorchenpeng
*
*/
classDeleteActionextendsAbstractAction...{
/***//**
*
*/
privatestaticfinallongserialVersionUID=1L;

publicDeleteAction(Stringlabel,Iconicon)...{
super(label,icon);
}

publicvoidactionPerformed(ActionEventevt)...{
deleteActionPerformed(evt);
}
}

privatefinalHashSet<Integer>set=newHashSet<Integer>();

publicsynchronizedvoiddeleteActionPerformed(ActionEventevt)...{
int[]selection=table.getSelectedRows();
if(selection==null||selection.length<=0)
return;
for(inti=0;i<selection.length;i++)...{
intmidx=table.convertRowIndexToModel(selection[i]);
set.add(midx);
SwingWorkerworker=model.getSwingWorker(midx);
if(worker!=null&&!worker.isDone())...{
worker.cancel(true);
}
worker=null;
}
//JTable过滤器
finalRowFilter<MyTableModel,Integer>filter=newRowFilter<MyTableModel,Integer>()...{

publicbooleaninclude(
Entry<?extendsMyTableModel,?extendsInteger>entry)...{
Integermidx=entry.getIdentifier();
return!set.contains(midx);
}
};
sorter.setRowFilter(filter);
table.repaint();
}

privateJPopupMenumakePopup()...{
JPopupMenupop=newJPopupMenu();
Actionact=newCreateNewAction("添加",null);
pop.add(act);
act=newCancelAction("取消",null);
int[]selection=table.getSelectedRows();
if(selection==null||selection.length<=0)
act.setEnabled(false);
pop.add(act);
//分割线
pop.add(newJSeparator());
act=newDeleteAction("删除",null);
if(selection==null||selection.length<=0)
act.setEnabled(false);
pop.add(act);
returnpop;
}

publicstaticvoidmain(String[]args)...{
EventQueue.invokeLater(newRunnable()...{
publicvoidrun()...{
createGUI();
}
});
}

publicstaticvoidcreateGUI()...{

JFrameframe=newJFrame("在JTable中加载进度条及进行操作");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.getContentPane().add(newMyPanel());
frame.setSize(400,400);
//透明度90%
//NativeLoader.getInstance().setTransparence(frame,0.9f);
//居中
frame.setLocationRelativeTo(null);
frame.setVisible(true);

}
}

运行效果如下：