Question

java怎么自定义一个数据包并把它发送出去？

端口9600发到主机地址192.168.0.110（随便一台主机都行，主要是定义这个包部分，每个部分可以用0暂时填充一下。）包格式如图（急！！ 向各位大神神求助！）
最好有详细的代码实现，把这个自定义包的每一部分按顺序封装起来（不知道的部分例如DIP留出空间填0就可以了），用socket根据目的主机地址端口号发出去就可以了
发出去

Answer 1

客户端代码
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.net.InetSocketAddress;
import java.net.Socket;

public class Client {

public static void main(String[] args) {
int length = 0;
byte[] sendBytes = null;
Socket socket = null;
DataOutputStream dos = null;
FileInputStream fis = null;
try {
try {
socket = new Socket();
socket.connect(new InetSocketAddress("192.168.0.104", 3000),
10 * 1000);
dos = new DataOutputStream(socket.getOutputStream());
File file = new File("Moon.zip");
fis = new FileInputStream(file);

sendBytes = new byte[10240];
while ((length = fis.read(sendBytes, 0, sendBytes.length)) > 0) {
dos.write(sendBytes, 0, length);
dos.flush();
}
} finally {
if (dos != null)
dos.close();
if (fis != null)
fis.close();
if (socket != null)
socket.close();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
//////////////////////////////////////////////////////////
服务器代
import java.net.*;
import java.io.*;

public class Server implements Runnable {

public static void main(String[] args) {

try {
final ServerSocket server = new ServerSocket(3000);
Thread th = new Thread(new Runnable() {
public void run() {
while (true) {
try {
System.out.println("开始监听...");
Socket socket = server.accept();
System.out.println("有链接");
receiveFile(socket);
} catch (Exception e) {
}
}
}

});

th.run(); //启动线程运行
} catch (Exception e) {
e.printStackTrace();
}
}

public void run() {
}

public static void receiveFile(Socket socket) {

byte[] inputByte = null;
int length = 0;
DataInputStream dis = null;
FileOutputStream fos = null;
try {
try {

dis = new DataInputStream(socket.getInputStream());
fos = new FileOutputStream(new File("receive.MV"));
inputByte = new byte[1024];
System.out.println("开始接收数据...");
while ((length = dis.read(inputByte, 0, inputByte.length)) > 0) {
System.out.println(length);
fos.write(inputByte, 0, length);
fos.flush();
}
System.out.println("完成接收");
} finally {
if (fos != null)
fos.close();
if (dis != null)
dis.close();
if (socket != null)
socket.close();
}
} catch (Exception e) {

}

}
}
码

Answer 2

创建流，把信息写到流里面