java发送短信的实现步骤

public static void main(String[] args) throws Exception {    HttpClient client = new HttpClient();     PostMethod post = new PostMethod("http://gbk.api.smschinese.cn");     post.addRequestHeader("Content-Type",         "application/x-www-form-urlencoded;charset=gbk");// 在头文件中设置转码     NameValuePair[] data = { new NameValuePair("Uid", "用户名"),//中国网建sms平台注册的用户名         new NameValuePair("Key", "用户秘钥"),//中国网建sms平台注册的用户密钥         new NameValuePair("smsMob", "手机号"),//将要发送到的手机号码         new NameValuePair("smsText", "按照短信模板发送内容，短信模板中变量具体化即可") };//要发送的短信内容     post.setRequestBody(data);      client.executeMethod(post);     Header[] headers = post.getResponseHeaders();     int statusCode = post.getStatusCode();     System.out.println("statusCode:" + statusCode);     for (Header h : headers) {       System.out.println(h.toString());     }     String result = new String(post.getResponseBodyAsString().getBytes(         "gbk"));     System.out.println(result); // 打印返回消息状态      post.releaseConnection(); }