java通过UDP发送数组（非数组列表）

Question

我在客户端有这样的数组

int arr[]=新的int[]{1,6,3,2,9}

如何通过UDP将其发送到服务器？我如何在服务器端读取它

Answer 1

将数组转换为字节数组，然后发送字节数组。接收器将字节数组转换回int[]

可以使用类DataOutputStream创建字节数组

 ByteArrayOutputStream bos = new ByteArrayOutputStream();
    DataOutputStream dos = new DataOutputStream(bos);
    int len = 0;
    in protokollVersion = 1;
    // Write a version, in case you want to change your format later, such that 
    // the receiver has a chance to detect which format version is used.
    dos.writeInt(protokollVersion);
    if (arr != null) {
      len = arr.length;
    }
    dos.writeInt(arr.length);
    for (int i = 0; i  < len; i++) {
        dos.writeInt(arr[i]);
    }
    dos.close();
    byte[] bytes = bos.getBytes();

在接收器端，使用DataInputStream(byte[] bytes)和DataInputStream.readInt()读取字节数组