Map<String, String> queryMap = new HashMap<String, String>();
	queryMap.put("t", "wxm2-login");
	queryMap.put("lang", "zh_CN");
	queryMap.put("ajax", "true");
	String query = ParamUtils.mapToQuery(queryMap);

	String queryString = "t=wxm2-login&lang=zh_CN&ajax=true";
	Map<String, String> queryMap =  ParamUtils.queryToMap(queryString);

	HttpRequest request = new HttpRequest();
	String resultVal = request.addHeader("User-Agent", "Mozilla/5.0").addParam("username", "xxx@baidu.com").addParam("pwd", "123456").post("https://mp.weixin.qq.com/cgi-bin/login?lang=zh_CN");

	HttpRequest request = new HttpRequest();
	String resultVal = request.addHeader("User-Agent", "Mozilla/5.0").get("https://hao123.com");

	String resultVal = new HttpRequest().get("https://hao123.com");