How to use freemarker.ext.jsp

/**
 * Initialize the {@link TaglibFactory} for the given ServletContext.
 */
@Override
public void setServletContext(ServletContext servletContext) {
  this.taglibFactory = new TaglibFactory(servletContext);
}

private String getTaglibUriFromTld(InputStream tldFileIn, String tldFileXmlSystemId) throws SAXException, IOException {
  TldParserForTaglibUriExtraction tldParser = new TldParserForTaglibUriExtraction();
  parseXml(tldFileIn, tldFileXmlSystemId, tldParser);
  return tldParser.getTaglibUri();
}

 @Override
public JspWriter pushBody(Writer w) {
   return pushWriter(new JspWriterAdapter(w));
 }
 

@Override
public void println(float arg0) throws IOException {
  print(arg0);
  newLine();
}

 @Override
 public BodyContent pushBody() {
  return (BodyContent) pushWriter(new TagTransformModel.BodyContentImpl(getOut(), true));
}

@Override
public void println(long arg0) throws IOException {
  print(arg0);
  newLine();
}

@Override
public JspWriter popBody() {
  popWriter();
  return (JspWriter) getAttribute(OUT);
}

/**
 * Adds the TLD location mapping from the TLD itself.
 */
private void addTldLocationFromTld(TldLocation tldLocation) throws IOException, SAXException {
  InputStream in = tldLocation.getInputStream();
  try {
    addTldLocationFromTld(in, tldLocation);
  } finally {
    in.close();
  }
}

@Override
public int getAttributesScope(String name) {
  if (getAttribute(name, PAGE_SCOPE) != null) return PAGE_SCOPE;
  if (getAttribute(name, REQUEST_SCOPE) != null) return REQUEST_SCOPE;
  if (getAttribute(name, SESSION_SCOPE) != null) return SESSION_SCOPE;
  if (getAttribute(name, APPLICATION_SCOPE) != null) return APPLICATION_SCOPE;
  return 0;
}

  /**
   * Includes the specified path. The flush argument is ignored!
   */
  public void include(String path, boolean flush) throws IOException, ServletException {
    super.include(path);
  }
}

  @Override
  public String getSpecificationVersion() {
    return FreeMarkerJspFactory.this.getSpecificationVersion();
  }
};

/**
 * Sets the {@link ObjectWrapper} used when building the JSP tag library {@link TemplateHashModel}-s from the TLD-s.
 * Usually, it should be the same {@link ObjectWrapper} that will be used inside the templates. {@code null} value
 * is only supported for backward compatibility. For custom EL functions to be exposed, it must be non-{@code null}
 * and an {@code intanceof} {@link BeansWrapper} (like typically, a {@link DefaultObjectWrapper}).
 * 
 * @since 2.3.22
 */
public void setObjectWrapper(ObjectWrapper objectWrapper) {
  checkNotStarted();
  this.objectWrapper = objectWrapper;
}

/**
 * Initialize the {@link TaglibFactory} for the given ServletContext.
 */
@Override
public void setServletContext(ServletContext servletContext) {
  this.taglibFactory = new TaglibFactory(servletContext);
}

@Override
public void println(long arg0) throws IOException {
  print(arg0);
  newLine();
}

@Override
public void println(int arg0) throws IOException {
  print(arg0);
  newLine();
}

@Override
public void println(int arg0) throws IOException {
  print(arg0);
  newLine();
}

@Override
public void println(Object arg0) throws IOException {
  print(arg0);
  newLine();
}

@Override
public void println(double arg0) throws IOException {
  print(arg0);
  newLine();
}

@Override
public void println(Object arg0) throws IOException {
  print(arg0);
  newLine();
}

@Override
public void println(char arg0) throws IOException {
  print(arg0);
  newLine();
}