Jsoup給select,radio,checked,賦值

/**給element賦值
	 * @param el
	 * @param val
	 */
	public static void setElementValue(Element el,String val){
		if(el == null || val == null){
			return;
		}
		if(el.tagName().equals("select")){
			el.children().removeAttr("selected");
			for (Element el_option : el.children()) {
				if(val.equals(el_option.attr("value"))){
					el_option.attr("selected","selected");
					break;
				}
			}
		}else if(el.attr("type").equals("radio") || el.attr("type").equals("checkbox")){
			if(val.equals(el.attr("value"))){
				el.attr("checked","checked");
			}
		}else{
			el.val(val);
		}
	}

    public static void main(String[] args)
	{
		String s = "<input type='checkbox' name='a' value='a'>"+
        "<input type='radio' name='a' value='a'>"+
        "<select name='b'  id='b'><option value='a'>北京</option> <option value='2'>上海</option></select>";
		Document doc_data = Jsoup.parse(s);
		Elements els = doc_data.select("input,textarea,select");
		for(Element el : els){
			setElementValue(el,"a");
		}
		System.out.println(doc_data.body().html());
	}