在JTable中加载进度条及进行操作-白红宇

在JTable中加载进度条及进行操作

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发布时间：2019-05-03

本文共 5681 字，大约阅读时间需要 18 分钟。

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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;

/** */

/**

*

* 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("名称", String.class, false),

new ColumnContext("进度", 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) ...{

//删除

text = "取消完毕";

} 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);

//背景色及字体设置

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("进度条测试", 100), 分享一下我老师大神的人工智能教程。零基础！通俗易懂！风趣幽默！还带黄段子！希望你也加入到我们人工智能的队伍中来！

转载地址：http://aeeub.baihongyu.com/

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