Http 四种请求访问代码 HttpGet HttpPost HttpPut HttpDelete
逻辑:Stringurl="http://www.baidu.com";//将要访问的url字符串放入HttpPost中HttpPosthttpPost=newHttpPost(url);//请求头放置一些修改http请求头和cookiehttpPost.setHeader("Accept","application/json");......//如果是HttpPost或者HttpPut请求需要在