code: public static Writer render(Template templateContent, Map<String, Object> bindingMap, Writer writer) {
  		templateContent.binding(bindingMap);
  		templateContent.renderTo(writer);
  		return writer;
  	}
docs: 渲染模板
  
  @param templateContent {@link Template}
  @param bindingMap 绑定参数
  @param writer {@link Writer} 渲染后写入的目标Writer
  @return {@link Writer}