1.定义一个入参的实体类，把要传的参数封装
2，新建实体类，并赋值，转换成json串，例如

MessageBean messageBean=new MessageBean();
	messageBean.setServerNum(messagesMsg);//用户手机号
	messageBean.setLevel(level);//告警等级
	messageBean.setCreatedDate(new Date());
	messageBean.setContent(contentMsg);
	String messageBeanInfo = JSONObject.toJSONString(messageBean);
				

3，调用接口的方法

	public String sendPost(String jsonStr, String path) throws IOException {
		byte[] data = jsonStr.getBytes();
		java.net.URL url = new java.net.URL(path);
		java.net.HttpURLConnection conn = (java.net.HttpURLConnection) url.openConnection();
		conn.setRequestMethod("POST");
		conn.setConnectTimeout(5 * 1000);// 设置连接超时时间为5秒
		conn.setReadTimeout(20 * 1000);// 设置读取超时时间为20秒
		// 使用 URL 连接进行输出，则将 DoOutput标志设置为 true
		conn.setDoOutput(true);

		conn.setRequestProperty("Content-Type", "text/xml;charset=UTF-8");
		// conn.setRequestProperty("Content-Encoding","gzip");
		conn.setRequestProperty("Content-Length", String.valueOf(data.length));
		OutputStream outStream = conn.getOutputStream();// 返回写入到此连接的输出流
		outStream.write(data);
		outStream.close();// 关闭流
		String msg = "";// 保存调用http服务后的响应信息
		// 如果请求响应码是200，则表示成功
		if (conn.getResponseCode() == 200) {
			// HTTP服务端返回的编码是UTF-8,故必须设置为UTF-8,保持编码统一,否则会出现中文乱码
			BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
			msg = in.readLine();
			in.close();
		}
		conn.disconnect();// 断开连接
		return msg;
	}

4，调用，并返回参数

try {
	returnMsg =sendPost(messageBeanInfo, sendMessageUrl);
	reqJsonMsg=messageBeanInfo;
} catch (IOException e) {
	e.printStackTrace();
}