黑马程序员---网络编程之文件上传

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------- android培训、java培训、期待与您交流！ ----------、

   网络编程

<span style="white-space:pre">		</span>DatagramSocket ds = new DatagramSocket();
		byte[] bys = "udp,我来了".getBytes();
		DatagramPacket dp = new DatagramPacket
		(bys,bys.length,InetAddress.getByName("192.168.32.80"),12345);
		ds.send(dp);
		ds.close();

<span style="white-space:pre">		</span>DatagramSocket ds = new DatagramSocket(12345);
		byte[] bys = new byte[1024];
		DatagramPacket dp = new DatagramPacket(bys,bys.length);
		ds.receive(dp);
		String ip = dp.getAddress().getHostAddress();
		String data = new String(dp.getData(),0,dp.getLength());
		System.out.println(ip+"---"+data);
		ds.close();<span style="font-family: 'Microsoft YaHei'; background-color: rgb(255, 255, 255);">		</span>

		Socket s = new Socket("192.168.32.80",12345);
		OutputStream os = s.getOutputStream();
		os.write("tcp,我来了".getBytes());
		s.close();

		ServerSocket ss = new ServerSokcet(12345);
		Socket s = ss.accept();
		InputStream is = s.getInputStream();
		byte[] bys = new byte[1024];
		int len = is.read(bys);
		String data = new String(bys,0,len);
		System.out.println(data);
		s.close();
			ss.close();

E:客户端是读取图片，服务器是写到图片。反馈信息

客户端代码：

<span style="white-space:pre">		</span>public class ClientDemo {
	<span style="white-space:pre">	</span><span style="white-space:pre">	</span>public static void main(String[] args) throws IOException {
	<span style="white-space:pre">		</span>	// 窗口客户端对象
	<span style="white-space:pre">		</span>	Socket s = new Socket("192.168.237.1", 12345);
	<span style="white-space:pre">		</span>	InputStream is = new FileInputStream("test.jpg");
	<span style="white-space:pre">		</span>	// 写到通道
	<span style="white-space:pre">	</span>	<span style="white-space:pre">	</span>OutputStream os = s.getOutputStream();
	<span style="white-space:pre">	</span>	<span style="white-space:pre">	</span>int by = 0;
	<span style="white-space:pre">		</span>	while ((by = is.read()) != -1) {
	<span style="white-space:pre">	</span>	<span style="white-space:pre">	</span>	os.write(by);
	<span style="white-space:pre">		</span>	}
		<span style="white-space:pre">	</span><span style="white-space:pre">	</span>s.shutdownOutput();
	<span style="white-space:pre">		</span>	BufferedReader reader = new BufferedReader(new InputStreamReader(
	<span style="white-space:pre">		</span>			s.getInputStream()));
	<span style="white-space:pre">		</span>	String data = reader.readLine(); // 阻塞式
	<span style="white-space:pre">		</span>	System.out.println("client:" + data);
<span style="white-space:pre">		</span>
	<span style="white-space:pre">		</span>	// 释放资源
	<span style="white-space:pre">		</span>	is.close();
	<span style="white-space:pre">		</span>	s.close();
	<span style="white-space:pre">	</span><span style="white-space:pre">	</span>}
<span style="white-space:pre">		</span>}

<span style="white-space:pre">		</span>public class ServerDemo {
<span style="white-space:pre">		</span>	public static void main(String[] args) throws IOException {
	<span style="white-space:pre">		</span>	// 创建服务器对象
	<span style="white-space:pre">		</span>	ServerSocket ss = new ServerSocket(12345);
	<span style="white-space:pre">		</span>	// 监听客户端连接
	<span style="white-space:pre">		</span>	Socket s = ss.accept();
	<span style="white-space:pre">	</span>	<span style="white-space:pre">	</span>// 获取输入流
	<span style="white-space:pre">		</span>	InputStream is = s.getInputStream();
	<span style="white-space:pre">	</span>	<span style="white-space:pre">	</span>// 获取输出流
	<span style="white-space:pre">		</span>	OutputStream os = new FileOutputStream("copy.jpg");
	<span style="white-space:pre">		</span>	int by = 0;
	<span style="white-space:pre">		</span>	while ((by = is.read()) != -1) {
	<span style="white-space:pre">		</span>		os.write(by);
	<span style="white-space:pre">		</span>	}
	<span style="white-space:pre">		</span>	// 给出反馈
	<span style="white-space:pre">	</span><span style="white-space:pre">	</span>	BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(
	<span style="white-space:pre">	</span><span style="white-space:pre">	</span>			s.getOutputStream()));
	<span style="white-space:pre">	</span><span style="white-space:pre">	</span>	writer.write("文件上传成功");
	<span style="white-space:pre">	</span><span style="white-space:pre">	</span>	writer.newLine();
	<span style="white-space:pre">	</span>	<span style="white-space:pre">	</span>writer.flush();
<span style="white-space:pre">	</span>
		<span style="white-space:pre">	</span><span style="white-space:pre">	</span>os.close();
	<span style="white-space:pre">	</span><span style="white-space:pre">	</span>	s.close();
	<span style="white-space:pre">		</span>	ss.close();
<span style="white-space:pre">	</span>	<span style="white-space:pre">	</span>}
<span style="white-space:pre">		</span>}

<span style="white-space:pre">	</span>client:文件上传成功

黑马程序员---网络编程之文件上传

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原文地址：http://blog.csdn.net/chaoyangmemory/article/details/46698605