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

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();
}
}
}
}
}