TCP练习1：服务器端读取图片并发送给客户端，客户端保存图片到本地

最新推荐文章于 2023-06-29 17:09:55 发布

原创最新推荐文章于 2023-06-29 17:09:55 发布 · 5.6k 阅读

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#socket #Java #tcp #服务器

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本文演示了在Java中实现服务器端与客户端之间的图片传输过程，通过Socket编程，客户端从服务器获取图片并保存到本地文件系统，服务器则从指定路径读取图片并发送给客户端。

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import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;

import org.junit.Test;

/*

* 服务器端读取图片并发送给客户端，客户端保存图片到本地

*在当前工程目录下导入一张图片，命名为1.jpg

*/

public class TCPExer1 {
/*
* 客户端
*/
@Test
public void client() {
Socket socket = null;
FileOutputStream fos = null;
InputStream is = null;
try {
socket = new Socket(InetAddress.getByName("127.0.0.1"), 9090);
fos = new FileOutputStream(new File("E:\\3.jpg"));
is = socket.getInputStream();
byte[] b = new byte[1024];
int len;
while ((len = is.read(b)) != -1) {
fos.write(b, 0, len);
}
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (fos != null) {
try {
is.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (fos != null) {
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}

/*
* 服务器端
*/
@Test
public void server() {
ServerSocket ss = null;
Socket socket = null;
FileInputStream fis = null;
OutputStream os = null;
try {
ss = new ServerSocket(9090);
socket = ss.accept();
fis = new FileInputStream(new File("2.jpg"));
os = socket.getOutputStream();
byte[] b = new byte[1024];
int len;
while ((len = fis.read(b)) != -1) {
os.write(b, 0, len);
}
socket.shutdownOutput();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (os != null) {
try {
os.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (fis != null) {
try {
fis.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (socket != null) {
try {
socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (ss != null) {
try {
ss.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}