在Swing中使用Html标签

最新推荐文章于 2025-05-31 10:48:35 发布

最新推荐文章于 2025-05-31 10:48:35 发布 · 178 阅读

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#java

本文介绍如何在Swing中利用HTML标签丰富界面显示效果，包括使用JLabel和JEditorPane展示带链接的文本，并实现不同状态下的样式变化。

在Swing中，有时可能会出现一些较为复杂的样式表现需求，如果单纯通过代码实现，往往得不偿失。这时，我们就可以利用html标签，在组件中得到我们想要的效果。

例子如下：

packageorg.loon.test;

importjava.awt.BorderLayout;

importjava.awt.Color;

importjava.awt.Desktop;

importjava.awt.Dimension;

importjava.awt.EventQueue;

importjava.awt.Font;

importjava.awt.Graphics;

importjava.awt.Graphics2D;

importjava.awt.GridLayout;

importjava.awt.color.ColorSpace;

importjava.awt.event.ActionEvent;

importjava.awt.image.BufferedImage;

importjava.awt.image.ColorConvertOp;

importjava.io.IOException;

importjava.net.URI;

importjava.net.URISyntaxException;

importjavax.swing.AbstractAction;

importjavax.swing.BorderFactory;

importjavax.swing.JCheckBox;

importjavax.swing.JComponent;

importjavax.swing.JEditorPane;

importjavax.swing.JFrame;

importjavax.swing.JLabel;

importjavax.swing.JPanel;

importjavax.swing.UIManager;

importjavax.swing.WindowConstants;

importjavax.swing.event.HyperlinkEvent;

importjavax.swing.event.HyperlinkListener;

/***//**

*

*Title:LoonFramework

*

*

*Description:

*

*

*

*

*Company:LoonFramework

*

*@authorchenpeng

*@email：ceponline@yahoo.com.cn

*@version0.1

publicclassHtmlLableextendsJPanel...{

//内置了本地系统桌面操作支持

privateDesktopdesktop;

privatestaticfinallongserialVersionUID=1L;

//html内容

privatestaticfinalStringHTML_TEXT="<html><fontcolor='red'><ahref="http://www.helpsoff.com.cn"target="_blank">支持SOFF，插件无罪</a>";

publicHtmlLable()...{

super(newBorderLayout());

finalJLabellabel0=newJLabel("普通的JLabel");

finalJLabellabel1=newJLabel(HTML_TEXT);

finalJLabellabel2=newJLabel(HTML_TEXT)...{

privatestaticfinallongserialVersionUID=1L;

//设定Enabled样式

publicvoidsetEnabled(booleanb)...{

super.setEnabled(b);

setForeground(b?(Color)UIManager.get("Label.foreground")

:(Color)UIManager.get("Label.disabledForeground"));

}

};

finalJLabellabel3=newJLabel(HTML_TEXT)...{

privatestaticfinallongserialVersionUID=1L;

//阴影

privateBufferedImageshadow;

//设定Enabled样式

publicvoidsetEnabled(booleanb)...{

setForeground(b?(Color)UIManager.get("Label.foreground")

:(Color)UIManager.get("Label.disabledForeground"));

if(!b)...{

BufferedImagesource=newBufferedImage(getWidth(),

getHeight(),BufferedImage.TYPE_INT_ARGB);

Graphics2Dg2=source.createGraphics();

g2.setPaint(newColor(0,0,0,0));

g2.fillRect(0,0,getWidth(),getHeight());

paint(g2);

g2.dispose();

ColorConvertOpcolorConvert=newColorConvertOp(ColorSpace

.getInstance(ColorSpace.CS_GRAY),null);

shadow=colorConvert.filter(source,null);

}

super.setEnabled(b);

}

publicvoidpaintComponent(Graphicsg)...{

if(isEnabled())...{

super.paintComponent(g);

}else...{

if(shadow!=null)

g.drawImage(shadow,0,0,this);

}

};

/***//**

*设定为html

finalJEditorPaneeditor1=newMyHtmlEdit("text/html",HTML_TEXT);

editor1.setOpaque(false);

editor1.setEditable(false);

finalJEditorPaneeditor2=newMyHtmlEdit("text/html",HTML_TEXT);

editor2.setOpaque(false);

editor2.setEditable(false);

editor2.putClientProperty(JEditorPane.HONOR_DISPLAY_PROPERTIES,

Boolean.TRUE);

editor2.setFont((Font)UIManager.get("Label.font"));

JPanelbox=newJPanel(newGridLayout(2,3));

box.add(makePanel("JLabel",label0));

box.add(makePanel("JLabel+Html",label1));

box.add(makePanel("JLabel+Html+",label2));

box.add(makePanel("JLabel+Html++",label3));

box.add(makePanel("JEditorPane",editor1));

box.add(makePanel("JEditorPane+",editor2));

JCheckBoxcheck=newJCheckBox("setEnabled",true);

check.setAction(newAbstractAction("setEnabled")...{

privatestaticfinallongserialVersionUID=1L;

publicvoidactionPerformed(ActionEvente)...{

booleanflag=((JCheckBox)e.getSource()).isSelected();

setVisible(false);

label0.setEnabled(flag);

label1.setEnabled(flag);

label2.setEnabled(flag);

label3.setEnabled(flag);

editor1.setEnabled(flag);

editor2.setEnabled(flag);

setVisible(true);

}

});

add(check,BorderLayout.NORTH);

add(box,BorderLayout.CENTER);

desktop=Desktop.getDesktop();

}

/***//**

*自定义一个JEditorPane，用以处理html事件

*@authorchenpeng

classMyHtmlEditextendsJEditorPaneimplementsHyperlinkListener...{

/***//**

privatestaticfinallongserialVersionUID=1L;

publicMyHtmlEdit(Stringtype,Stringtext)...{

super(type,text);

addHyperlinkListener(this);

}

publicvoidhyperlinkUpdate(HyperlinkEvente)...{

if(e.getEventType()==HyperlinkEvent.EventType.ACTIVATED)...{

try...{

//在本地浏览器中打开uri(jdk1.6后由于强化了awt,就不用再自己写本地浏览器调用了)

desktop.browse(e.getURL().toURI());

}catch(IOExceptionex)...{

ex.printStackTrace();

}catch(URISyntaxExceptionex)...{

ex.printStackTrace();

}

/***//**

*创建面板

*@paramtitle

*@paramlabel

*@return

privateJPanelmakePanel(Stringtitle,JComponentlabel)...{

JPanelp=newJPanel(newGridLayout(1,1));

p.setBorder(BorderFactory.createTitledBorder(title));

p.add(label);

returnp;

}

publicstaticvoidmain(String[]args)...{

EventQueue.invokeLater(newRunnable()...{

publicvoidrun()...{

createGUI();

}

});

}

publicstaticvoidcreateGUI()...{

JFrameframe=newJFrame("在Swing中使用Html标签");

frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

frame.setSize(newDimension(450,200));

frame.getContentPane().add(newHtmlLable());

frame.setResizable(false);

frame.setLocationRelativeTo(null);

//jdk1.6新项,置顶

frame.setAlwaysOnTop(true);

frame.setVisible(true);

}

效果图：

这时的Swing，既可以实现Swing原有组件功能，也可以接受Html操作，可说是JavaGUI技术中为数不多的亮点之一。