如何在发送消息到服务器之前如何操作字节？

Question

我在如何将String MBASE16 =“ 2701”发送到类似我的代码的字节中时遇到一些问题。

try {
        socket = new Socket(address, port);

        if (socket.isConnected()) {
            System.out.println("Connected");
        }

        // sends output to the socket
        out = new DataOutputStream(socket.getOutputStream());
        //takes input from socket
        in2 = new BufferedReader(new InputStreamReader(socket.getInputStream(), CHARSET));
        byte[] MBASE16 = {0x02,0x70,0x1f};// <-- how to convert this string 2701 into byte like this
        out.write(MBASE16);

Answer 1

字符串类具有用于将字符串转换为字节的getBytes方法

String str = "2701";
byte[] = str.getBytes(CHARSET);