package Demo;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLConnection;

public class SendSms {



public static String sendPost(String url, String param) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
URLConnection conn = realUrl.openConnection();
// 设置通用的请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
// 发送请求参数
out = new PrintWriter(conn.getOutputStream());
// flush输出流的缓冲
out.print(param);
// 发送请求参数
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送 请求出现异常！"+e);
e.printStackTrace();
}
//使用finally块来关闭输出流、输入流
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex){
ex.printStackTrace();
}
}
return result;
}
public static String urlEncode(String str, String charset) {
try {
return java.net.URLEncoder.encode(str, charset);
} catch (UnsupportedEncodingException ex) {
ex.printStackTrace();
return "";
}
}

}

package Demo;

public class SendPost {
public static void main(String[] args) {
SendSms post=new SendSms();
String host="https://u.smsyun.cc/sms-partner/access/{您的账号}/sendsms"; //提交地址?
String account="您的账号"; //用户名
String password="8a6f2805b4515ac12058e79e662345e9"; //密码进行MD5加密 32位小写
String mobile="18624151123"; //合法的手机号码，号码间用英文逗号分隔
int code= (int)((Math.random()*9+1)*100000);
String content="【云信互联】验证码是"+code+"您正在改密码验证码30分钟有效";//发送内容



String data="{"smstype":"4","clientid":""+account+"","password":""+password+"","mobile":""+mobile+"","content":""+content+"","sendtime":"2019-03-19 17:29:19","extend":"00","uid":"00"}";

//发送 POST 请求
String sr=post.sendPost(host, data);
System.out.println(sr);
// code===0代表发送成功
}


}