1.客户端发送内容给服务端，服务端将内容打印到控制台上。
public class TCPTest1 {
//客户端
@Test
public void client() {
Socket socket = null;
OutputStream os = null;
try {
//1.创建Socket对象，指明服务器端的ip和端口号
InetAddress inet = InetAddress.getByName("192.168.14.100");
socket = new Socket(inet,8899);
//2.获取一个输出流，用于输出数据
os = socket.getOutputStream();
//3.写出数据的操作
os.write("你好，我是客户端mm".getBytes());
} catch (IOException e) {
e.printStackTrace();
} finally {
//4.资源的关闭
if(os != null){
try {
os.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(socket != null){
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
//服务端
@Test
public void server() {
ServerSocket ss = null;
Socket socket = null;
InputStream is = null;
ByteArrayOutputStream baos = null;
try {
//1.创建服务器端的ServerSocket，指明自己的端口号
ss = new ServerSocket(8899);
//2.调用accept()表示接收来自于客户端的socket
socket = ss.accept();
//3.获取输入流
is = socket.getInputStream();
//不建议这样写，可能会有乱码
// byte[] buffer = new byte[1024];
// int len;
// while((len = is.read(buffer)) != -1){
// String str = new String(buffer,0,len);
// System.out.print(str);
// }
//4.读取输入流中的数据
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){
//5.关闭资源
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();
}
}
}
}
}
2.客户端发送文件给服务端，服务端将文件保存在本地。
public class TCPTest2 {
@Test
public void client() throws IOException { //客户端
//1.创建Socket对象，指明服务器端的ip和端口号
Socket socket = new Socket(InetAddress.getByName("127.0.0.1"),9090);
//2.获取一个输出流，用于输出数据
OutputStream os = socket.getOutputStream();
//3.获取一个输入流，从文件里读数据，把想要传输的文件读进来
FileInputStream fis = new FileInputStream(new File("beauty.jpg"));
//4.读+写操作
byte[] buffer = new byte[1024];
int len;
while((len = fis.read(buffer)) != -1){
os.write(buffer,0,len);
}
//5.资源关闭
fis.close();
os.close();
socket.close();
}
@Test
public void server() throws IOException { //服务端
//1.创建服务器端的ServerSocket，指明自己的端口号，不用指明ip了
ServerSocket ss = new ServerSocket(9090);
//2.调用accept()表示接收来自于客户端的socket
Socket socket = ss.accept();
//3.获取客户端的输入流
InputStream is = socket.getInputStream();
//4.本地的OutputStream，获取输出流-将数据写到指定文件中
FileOutputStream fos = new FileOutputStream(new File("beauty1.jpg"));
//5.读取输入流中的数据
byte[] buffer = new byte[1024];
int len;
while((len = is.read(buffer)) != -1){
fos.write(buffer,0,len);
}
//6.关闭资源
fos.close();
is.close();
socket.close();
ss.close();
}
}
3.从客户端发送文件给服务端，服务端保存到本地。并返回“发送成功”给客户端。并关闭相应的连接。
public class TCPTest3 {
@Test
public void client() throws IOException { //客户端
//1.
Socket socket = new Socket(InetAddress.getByName("127.0.0.1"),9090);
//2.
OutputStream os = socket.getOutputStream();
//3.
FileInputStream fis = new FileInputStream(new File("beauty.jpg"));
//4.发送图片
byte[] buffer = new byte[1024];
int len;
while((len = fis.read(buffer)) != -1){
os.write(buffer,0,len);
}
//客户端传完以后，关闭数据的输出
socket.shutdownOutput();
//5.接收来自于服务器端的数据，并显示到控制台上
InputStream is = socket.getInputStream();
//防止乱码
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] bufferr = new byte[20];
int len1;
while((len1 = is.read(buffer)) != -1){
baos.write(buffer,0,len1);
}
//数据显示
System.out.println(baos.toString());
//6.
fis.close();
os.close();
socket.close();
baos.close();
}
@Test
public void server() throws IOException { //服务端
//1.
ServerSocket ss = new ServerSocket(9090);
//2.
Socket socket = ss.accept();
//3.
InputStream is = socket.getInputStream();
//4.
FileOutputStream fos = new FileOutputStream(new File("beauty2.jpg"));
//5.接收图片
byte[] buffer = new byte[1024];
int len;
while((len = is.read(buffer)) != -1){
fos.write(buffer,0,len);
}
System.out.println("图片已收到");
//6.服务器端给予客户端反馈
OutputStream os = socket.getOutputStream();
os.write("你好，丸子，照片我已收到，非常漂亮！".getBytes());
//7.资源关闭
fos.close();
is.close();
socket.close();
ss.close();
os.close();
}
}
