微信公众平台自定义菜单实现-java版

菜单创建
接口说明
通过POST一个特定结构体，实现在微信客户端创建自定义菜单。
请求说明
http请求方式：POST

https://api.weixin.qq.com/cgi-bin/menu/create?access_token=ACCESS_TOKEN

结构体其实就是一个json格式的字符串，相信很多朋友就卡在这里了，怎么往这个接口地址 post 一个结构体呢，实现代码如下：

public static void main(String[] args) throws Exception {
    URL url = new URL("https://api.weixin.qq.com/cgi-bin                                 /menu/create?access_token=TOKEN");
        String responeJsonStr = "{"+
                                     "\"button\":["+
	                                 "{\"name\":\"酒店预订\","+
	                	             "\"sub_button\":["+
	                		 "{"+
	                			"\"type\":\"click\","+
	                			"\"name\":\"附近酒店\","+
	                			"\"key\":\"jintoneinn488878-1\""+
	                		"},"+
	                		"{"+
                				"\"type\":\"click\","+
                				"\"name\":\"查找酒店\","+
                				"\"key\":\"jintoneinn488878-2\""+
                			"}"+
	                	"]"+
	                "}"
	            "]"+
	        "}";
		HttpURLConnection conn = (HttpURLConnection) url.openConnection();
		conn.setRequestMethod("POST");
		conn.setDoOutput(true);
		conn.connect();
		conn.getOutputStream().write(responeJsonStr.getBytes("utf-8"));
		InputStream is = conn.getInputStream();
		BufferedReader in = new BufferedReader(new InputStreamReader(is,"utf-8"));

		StringBuffer buffer = new StringBuffer();
		String line = "";
		while ((line = in.readLine()) != null) {
			buffer.append(line);
		}
		System.out.println(buffer.toString()); 
	}