Question

java 如何发送IP数据报？并且在IP数据报中封装UDP数据报。

Answer 1

// 客户端
void Cilent() {
private String host = "127.0.0.1";
private int port = 10086;
private OutputStream outputStream;
private byte[] bytes = new byte[1024];
private String string = "我来自客户端";
bytes = string.getBytes();
Socket socket = null;
try {
socket = new Socket(host, port);//封装目标IP和端口
outputStream = socket.getOutputStream();
outputStream.write(bytes);//封装UDP数据
outputStream.flush();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
outputStream.close();//关闭输出流
}
}