urlfilter.java

BBS论坛设计JSP＋MYSQL

package com.bcxy.bbs.filter;

/**
 * Title:
 * Description:
 * Copyright:
 * Company: www.liyunet.com
 * 
 * @author lishujiang	
 * @version 1.0
 */

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class URLFilter extends filter {

	public URLFilter(String s) {
		super(s);
	}

	public URLFilter() {

	}

	public String convertString() {
		return this.URLConverter();
	}

	public String URLConverter() {

		Pattern p = Pattern
				.compile(
						"(\\[(URL)((=(((http://)|(ftp://))?)([^\\[]*))?)\\])((((http://)|(ftp://))?)([^\\[]*))(\\[(\\/URL)\\])",
						Pattern.CASE_INSENSITIVE);
		Matcher m = p.matcher(s);
		StringBuffer sb = new StringBuffer();
		boolean result = m.find();
		while (result) {
			m.appendReplacement(sb, "<a href=\"");
			if (!"".equals(m.group(3))) {
				if ("".equals(m.group(5))){
					if (m.group(10) == null){
						sb.append("http://" + m.group(9) + "\" target=_blank>"
								+ m.group(9) + "</a>");
					}else{
						sb.append("" + m.group(9) + "\" target=_blank>"
								+ m.group(10) + "</a>");
					}
				}else if (m.group(10) == null){
					sb.append(m.group(5) + m.group(9) + "\" target=_blank>"
							+ m.group(5) + m.group(9) + "</a>");
				}else{
					sb.append(m.group(5) + m.group(9) + "\" target=_blank>"
							+ m.group(10) + "</a>");
				}
			} else {
				if ("".equals(m.group(11)))
					sb.append("http://" + m.group(10) + "\" target=_blank>"
							+ m.group(10) + "</a>");
				else
					sb.append(m.group(10) + "\" target=_blank>" + m.group(10)
							+ "</a>");
			}
			result = m.find();
		}
		m.appendTail(sb);

		return sb.toString();

	}
}