求 Connection refused: connect具体解决方法，谢谢

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public class URLReader {

    public static void main(String[] args) throws IOException {
        
             InetAddress address = InetAddress.getByName("localhost");
             Socket s = new Socket(address, 8080);  //向服务器侦听端口发出请求
             System.out.println("客户端已启动。");
    }
}

编译后提示
Exception in thread "main" Connection refused: connect
    at (Native Method)
    at (Unknown Source)
    at (Unknown Source)
    at (Unknown Source)
    at (Unknown Source)
    at (Unknown Source)
    at (Unknown Source)
    at (Unknown Source)
    at (Unknown Source)
    at (Unknown Source)
    at (Unknown Source)
    at URLReader.main(URLReader.java:15)

重启有用的话我就不在这问了。谢谢你的回复

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