bbsfilter.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 com.bcxy.bbs.codeviewer.CodeViewer;
import com.bcxy.bbs.util.StringUtils;

public class BBSFilter {
	boolean newWindowEnabled = true;

	private static final String NEW_LINE = System.getProperty("line.separator");

	private String commentStart;

	private String commentEnd;

	private String stringStart;

	private String stringEnd;

	private String reservedWordStart;

	private String reservedWordEnd;

	private CodeViewer viewer;

	public BBSFilter() {
		viewer = new CodeViewer();
		commentStart = viewer.getCommentStart();
		commentEnd = viewer.getCommentEnd();
		stringStart = viewer.getStringStart();
		stringEnd = viewer.getStringEnd();
		reservedWordStart = viewer.getReservedWordStart();
		reservedWordEnd = viewer.getReservedWordEnd();
	}

	public String convertURL(String input) {
		// 检查字符串是否为空,如果为空,则返回
		// 送进一些什么?
		if (input == null || input.length() == 0) {
			return input;
		} else {
			StringBuffer buf = new StringBuffer(input.length() + 25);
			char[] chars = input.toCharArray();

			int i = 0, j = 0, oldend = 0;
			int len = input.length();
			char cur;

			// 搜索字符串中含有的http://
			while ((i = input.indexOf("http://", oldend)) >= 0) {
				j = i + 7;
				cur = chars[j];
				while (j < len) {
					// 空格
					if (cur == ' ')
						break;
					// html
					if (cur == '<')
						break;
					// 换行
					if (cur == '\n')
						break;
					// Unix的换行
					if (cur == '\r' && j < len - 1 && chars[j + 1] == '\n')
						break;

					j++;
					if (j < len) {
						cur = chars[j];
					}
				}
				// 检查终结字符'.'或者 ','
				// 移出.
				if (chars[j - 1] == '.' || chars[j - 1] == ','
						|| chars[j - 1] == ')') {
					j--;
				}
				buf.append(chars, oldend, i - oldend);
				buf.append("<a href=\"");
				buf.append(chars, i, j - i);
				buf.append("\"");
				if (newWindowEnabled) {
					buf.append(" target=\"_blank\">");
				} else {
					buf.append(">");
				}
				buf.append(chars, i, j - i);
				buf.append("</a>");
				oldend = j;
			}
			buf.append(chars, j, len - j);
			return buf.toString();
		}
	}

	public String highlightCode(String input) {
		if (input == null || input.length() == 0) {
			return input;
		} else {
			StringBuffer buf = new StringBuffer(input.length() + 50);
			int i = 0, j = 0, oldend = 0;
			while ((i = input.indexOf("[code]", oldend)) >= 0) {
				//
				if ((j = input.indexOf("[/code]", i + 6)) < 0) {
					//
					j = input.length() - 7;
				}

				// 

				buf.append(StringUtils.escapeHTMLTags(input
						.substring(oldend, i)));
				buf
						.append("<table width=\"550\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\" bordercolorlight = \"black\" bordercolordark = \"#FFFFFF\" align=\"center\">");
				buf.append("<tr>");
				buf.append("<td bgcolor=\"#e6e6e6\" class=\"code\">");

				// buf.append("<pre>");
				//

				StringBuffer codeBuf = new StringBuffer(input.length() / 2);

				//
				// i
				if (i + 6 + 1 < input.length()
						&& (input.charAt(i + 6 + 1) == '\n')) {
					i++;
					if (i + 6 + 1 < input.length()
							&& (input.charAt(i + 6 + 1) == '\r')) {
						i++;
					}
				}
				buf.append(StringUtils
						.escapeHTMLTags(input.substring(i + 6, j)));
				/*
				 * BufferedReader reader = new BufferedReader(new
				 * StringReader(input.substring(i+6, j))); String line; try {
				 * while ((line = reader.readLine()) != null) { // u line =
				 * StringUtils.replace(line, "&lt;", "<"); line =
				 * StringUtils.replace(line, "&gt;", ">");
				 * codeBuf.append(viewer.syntaxHighlight(line));
				 * codeBuf.append(NEW_LINE); } } catch (IOException ioe) {
				 * ioe.printStackTrace(); } String code = codeBuf.toString(); //
				 * code = StringUtils.replace(code, "[", "&#91;"); code =
				 * StringUtils.replace(code, "]", "&#93;");
				 */
				// buf.append(code);
				// buf.append("</pre>");
				buf.append("</td>");
				buf.append("</tr>");
				buf.append("</table>");
				// 
				oldend = j + 7;
			}
			buf.append(StringUtils.escapeHTMLTags(input.substring(oldend, input
					.length())));

			return StringUtils.convertNewlines(buf.toString());
		}
	}

	public static void main(String args[]) {

	}

}