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Java Framework based on Spring Framework, Freemarker and Simplicity

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package com.clickntap.tool.html;

import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.Writer;

import javax.swing.text.html.parser.ParserDelegator;

public class HTMLParser {
  private static final String BODY_START_TAG = "";
  private static final String BODY_END_TAG = "";

  public static String parse(String html, HTMLFilter filter) throws Exception {
    html = parse(new StringReader(html), new StringWriter(), filter);
    html = html.replace("&amp;", "&");
    return html;
  }

  public static String getText(String html) throws Exception {
    return parse(new StringReader(html), new StringWriter());
  }

  public static String parseBody(String html, HTMLFilter filter) throws Exception {
    if (html.indexOf(BODY_START_TAG) < 0)
      html = parse(new StringReader(BODY_START_TAG + html + BODY_END_TAG), new StringWriter(), filter);
    else
      html = parse(new StringReader(html), new StringWriter(), filter);
    int x1 = html.indexOf(BODY_START_TAG);
    int x2 = html.indexOf(BODY_END_TAG);
    return x1 > 0 && x2 > 0 ? html.substring(x1 + BODY_START_TAG.length(), x2).trim() : html.trim();
  }

  public static String parse(Reader r, Writer w, HTMLFilter filter) throws Exception {
    ParserDelegator parser = new HTMLParserDelegator();
    parser.parse(new EntityPreserveReader(r), new HTMLParserCallBack(w, filter), true);
    return w.toString().trim();
  }

  public static String parse(Reader r, Writer w) throws Exception {
    ParserDelegator parser = new HTMLParserDelegator();
    parser.parse(new EntityPreserveReader(r), new TextParserCallBack(w), true);
    return w.toString().trim();
  }
}