code: protected void replaceOriginChildElements(XmlElement xe, String sql) {
  		sql = sql.trim();
  		String[] lines = sql.split(lineSeparator);
  		List<Element> elements = Lists.newArrayList();
  		for(String line : lines){
  			elements.add(new TextElement(line));
  		}
  		try {
  			elementsList.set(xe, elements);
  		} catch (IllegalArgumentException | IllegalAccessException e) {
  			e.printStackTrace();
  		}
  	}
docs: /*
  使用新的sql语句替换原来的xml内容
  @author Pin Liu