Java HTTP请求

注意：java  http请求要放在 try catch里面，该过程是一个阻塞过程，所以需要新建一个线程进行处理

        try
        {
            HttpPost request = new HttpPost(URL);
            StringEntity se = new StringEntity(param.toString(), HTTP.UTF_8);
            se.setContentType("application/json");
            request.setEntity(se);
            HttpResponse httpResponse = new DefaultHttpClient().execute(request);
            // 得到应答的字符串，这也是一个 JSON 格式保存的数据
            String retSrc = EntityUtils.toString(httpResponse.getEntity());
            retSrc = URLDecoder.decode(retSrc, "UTF-8");
}
        catch  (Exception e)
        {
            e.printStackTrace();
        }