Java实现TCP(socket)网络编程:
- 在Java中可以直接使用Socket实例化一个socket对象实现tcp协议,客户端和服务器端可通过Ip地址和端口在局域网中构建连接,并进行数据和文件的传输。
数据传输:
@Test
public void client() {
Socket socket = null;
OutputStream os = null;
try {
InetAddress inet = InetAddress.getByName("127.0.0.1");
socket = new Socket(inet,8899);
os = socket.getOutputStream();
os.write("你好,我是客户端".getBytes());
} catch (IOException e) {
e.printStackTrace();
} finally {
if(os != null){
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(socket != null){
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
@Test
public void server() {
ServerSocket ss = null;
Socket socket = null;
InputStream is = null;
ByteArrayOutputStream baos = null;
try {
ss = new ServerSocket(8899);
socket = ss.accept();
is = socket.getInputStream();
baos = new ByteArrayOutputStream();
byte[] buffer = new byte[5];
int len;
while((len = is.read(buffer)) != -1){
baos.write(buffer,0,len);
}
System.out.println(baos.toString());
System.out.println("收到了来自于:" + socket.getInetAddress().getHostAddress() + "的数据");
} catch (IOException e) {
e.printStackTrace();
} finally {
if(baos != null){
try {
baos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(is != null){
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(socket != null){
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(ss != null){
try {
ss.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
文件传输:
@Test
public void client() throws IOException {
Socket socket = new Socket(InetAddress.getByName("127.0.0.1"),9090);
OutputStream os = socket.getOutputStream();
FileInputStream fis = new FileInputStream(new File("beauty.jpg"));
byte[] buffer = new byte[1024];
int len;
while((len = fis.read(buffer)) != -1){
os.write(buffer,0,len);
}
socket.shutdownOutput();
InputStream is = socket.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] bufferr = new byte[20];
int len1;
while((len1 = is.read(buffer)) != -1){
baos.write(buffer,0,len1);
}
System.out.println(baos.toString());
fis.close();
os.close();
socket.close();
baos.close();
}
@Test
public void server() throws IOException {
ServerSocket ss = new ServerSocket(9090);
Socket socket = ss.accept();
InputStream is = socket.getInputStream();
FileOutputStream fos = new FileOutputStream(new File("beauty2.jpg"));
byte[] buffer = new byte[1024];
int len;
while((len = is.read(buffer)) != -1){
fos.write(buffer,0,len);
}
System.out.println("图片传输完成");
OutputStream os = socket.getOutputStream();
os.write("你好,照片我已收到!".getBytes());
fos.close();
is.close();
socket.close();
ss.close();
os.close();
}