tabpane.java

一个用css+javascript+html写的一个标签切换的东东.拿出来与大家分享.

/**
 * @(#) TabPane.java 2006-8-18
 * 
 * @author Roger Wang / Forever
 * 
 * Copyright @ 2006 by primeton.com All rights reserved.
 */

package com.digitalchina.power.taglib;

import java.io.IOException;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.BodyTagSupport;
import javax.servlet.jsp.tagext.Tag;


/**
 *  TabPane标签
 */
public class TabPane extends BodyTagSupport
{
	private String tabPaneId;
	
	private String width;

	private String height;

	private String align;
	
	private String scrolling;

	private String frameNames;
	
	private String onload;

	public TabPane()
	{
		tabPaneId = "tabPane1";
		width = "100%";
		height = "100%";
		align = "center";
		frameNames = null;
		onload = null;
		scrolling = "auto";
	}
	
	public int doStartTag() throws JspException
	{
		StringBuffer buf = new StringBuffer();
		buf.append( "<!-- TabPane 开始 -->\n" );
		buf.append( "<table width=\"" );
		buf.append( width );
		buf.append( "\" height=\"1\" border=\"0\" align=\"" );
		buf.append( align );
		buf.append( "\" cellpadding=\"0\" cellspacing=\"0\">\n" );
		buf.append( "<tr>\n" );
		buf.append( "<td height=\"24\" nowrap>\n" );
		buf.append( "<table frameNames=\"" );
		buf.append( checkString( frameNames ) );
		buf.append( "\" height=\"24\" border=\"0\" cellpadding=\"0\" cellspacing=\"0\" style=\"border-collapse:collapse;table-layout:fixed;\">\n" );
		buf.append( "<tr>\n" );
		buf.append( "<td width=\"6\" align=\"center\" valign=\"bottom\" class=\"nav_ld\" id=\"_tabpane_bou_"+ tabPaneId +"\"></td>\n" );

		try
		{
			JspWriter jspwriter = pageContext.getOut();
			jspwriter.print( buf.toString() );
		}
		catch( IOException e )
		{
			e.printStackTrace();
			throw new JspException( e.toString() );
		}
		return Tag.EVAL_BODY_INCLUDE;
	}

	public int doEndTag() throws JspException
	{
		StringBuffer buf = new StringBuffer();
		buf.append( "</tr>\n" );
		buf.append( "</table>\n" );
		buf.append( "</td>\n" );
		if( notBlankOrNull( frameNames ) )
		{
			buf.append( "<td class=\"right_top_td\" width=\"100%\" height=\"24\">&nbsp;</td>\n" );
		}
		buf.append( "</tr>\n" );
		if( notBlankOrNull( frameNames ) )
		{
			String[] frameNameArr = frameNames.split( ";" );
			buf.append( "<!-- 在下面设置iframe的宽度和高度 -->\n" );
			buf.append( "<tr>\n" );
			buf.append( "<td colspan=\"2\" class=\"content_td\" height=\"1\">\n" );
			for( int i = 0 ; i < frameNameArr.length ; i ++ )
			{
				buf.append( "<iframe id=\"" ).append( frameNameArr[i] ).append( "\" name=\"" );
				buf.append( frameNameArr[i] );
				buf.append( "\" width=\"" );
				buf.append( width );
				buf.append( "\" height=\"" );
				buf.append( height );
				buf.append( "\" " );
				if( onload != null && onload.trim().length() > 0 )
				{
					buf.append( "onload=\"" );
					buf.append( onload );
					buf.append( "\" " );
				}
				buf.append( "frameborder=\"0\" style=\"display:none;\" scrolling=\""+scrolling+"\" src=\"\"></iframe>" );
			}
			buf.append( "</td>\n" );
			buf.append( "</tr>\n" );
		}
		buf.append( "</table>\n" );
		buf.append( "<!-- TabPane 结束 -->\n" );

		try
		{
			JspWriter jspwriter = pageContext.getOut();
			jspwriter.print( buf.toString() );
		}
		catch( IOException e )
		{
			e.printStackTrace();
			throw new JspException( e.toString() );
		}

		release();
		return super.doEndTag();
	}

	public void release()
	{
		tabPaneId = "tabPane1";
		width = "100%";
		height = "100%";
		align = "center";
		frameNames = null;
		onload = null;
		scrolling = "auto";

		super.release();
	}
	
	public static boolean isBlankOrNull( String str )
	{
		if( str == null || str.trim().length() == 0 )
		{
			return true;
		}
		return false;
	}
	
	public static boolean notBlankOrNull( String str )
	{
		if( str == null || str.trim().length() == 0 )
		{
			return false;
		}
		return true;
	}

	/**
	 * @return 返回 align。
	 */
	public String getAlign()
	{
		return align;
	}

	/**
	 * @param align 要设置的 align。
	 */
	public void setAlign( String align )
	{
		this.align = align;
	}

	/**
	 * @return 返回 height。
	 */
	public String getHeight()
	{
		return height;
	}

	/**
	 * @param height 要设置的 height。
	 */
	public void setHeight( String height )
	{
		this.height = height;
	}

	/**
	 * @return 返回 width。
	 */
	public String getWidth()
	{
		return width;
	}

	/**
	 * @param width 要设置的 width。
	 */
	public void setWidth( String width )
	{
		this.width = width;
	}

	/**
	 * @return 返回 frameName。
	 */
	public String getFrameNames()
	{
		return frameNames;
	}

	/**
	 * @param frameName 要设置的 frameName。
	 */
	public void setFrameNames( String frameNames )
	{
		this.frameNames = frameNames;
	}
	
	
	/**
	 * @return 返回 tabPaneId。
	 */
	public String getTabPaneId()
	{
		return tabPaneId;
	}
	/**
	 * @param tabPaneId 要设置的 tabPaneId。
	 */
	public void setTabPaneId( String tabPaneId )
	{
		this.tabPaneId = tabPaneId;
	}
	
	
	/**
	 * @return 返回 onload。
	 */
	public String getOnload()
	{
		return onload;
	}
	/**
	 * @param onload 要设置的 onload。
	 */
	public void setOnload( String onload )
	{
		this.onload = onload;
	}
	
	
	/**
	 * @return 返回 scrolling。
	 */
	public String getScrolling()
	{
		return scrolling;
	}
	/**
	 * @param scrolling 要设置的 scrolling。
	 */
	public void setScrolling( String scrolling )
	{
		this.scrolling = scrolling;
	}
	
	private String checkString( String s )
	{
		if( s == null )
			return "";
		return s;
	}
}