分段解析字符串，查找替换指定的字符

public class ReplaceUrl {

	static String  s = "<DIV style='FONT-SIZE: 12px; MARGIN: 0px auto; COLOR: #666; HEIGHT: auto; TEXT-ALIGN: center'><a style='COLOR: #666'  href='#'>Home page</a> - <a style='COLOR: #666'  href='#'>Add to Favorites</a> - <a style='COLOR: #666'  href='#'>Stock</a> - <a style='COLOR: #666'  href='#'>China Brand</a> - <a style='COLOR: #666'  href='#'>My Office</a> - <a style='COLOR: #666'  href='#'>About Us</a> - <a style='COLOR: #666'  href='#'>Contact Us</a> - <a style='COLOR: #666'  href='#'>Sitemap</a> - <a style='COLOR: #666' href='#'>Help</a><BR>Copyright Notice ? 2009 My Global-inventory.cc All rights reserved.</DIV>";
	
	static String resultString = "";//最后结果
	static String lastString = s;//剩余串
	static String url = "http://www.java001.cn/";
	
	/**
	 * 将传入字符串中的链接自动加上前缀
	 * @param s 要替换的串
	 * @return 替换后的串
	 */
	public static String convert(String s,String regx){
		
		while(lastString.indexOf("href='") != -1 || lastString.indexOf("href=\"") != -1){
			String bufferS = "";//临时变量
			String head = "";//前缀
			int pos = lastString.indexOf("href='");
			int pos2 = lastString.indexOf("href=\"");
			if(pos == -1 && pos2 != -1){
				pos = pos2;
			}
			int endpos = lastString.indexOf("</a>");
			head = lastString.substring(0,pos);
			bufferS = lastString.substring(pos,endpos+4);
			bufferS = bufferS.replaceAll("href='", "href='"+regx);
			if(pos == -1 && pos2 != -1){
				bufferS = bufferS.replaceAll("href=\"", "href=\""+regx);
			}
			resultString += head+bufferS;
			lastString = lastString.substring(endpos+4,lastString.length());
			
			//System.out.println("head:"+head);
			//System.out.println("bufferS:"+bufferS);
			//System.out.println("resultS:"+resultS);
			//System.out.println("bufferS2:"+bufferS2);
			//System.out.println("======================================================================");
		}
		return resultString;
		//System.out.println("resultS:"+resultString);
	}
}