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功能描述: 从客户端向服务端发送字符串,服务端接收之后,把字符串转成大写,并返回给客户端,
客户端代码
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
public class ClientDemo {
public static void main(String[] args) throws IOException {
//客户端向服务点 发送字符串
Socket s = new Socket(InetAddress.getByName("SKY-20180725WBH"), 10010);
OutputStream os = s.getOutputStream();
os.write("tcp, i am coming again!!!".getBytes());
// 接受服务端返回的数据
InputStream is = s.getInputStream();
byte[] bytes = new byte[1024];
int len;
len = is.read(bytes);
System.out.println(new String(bytes,0 ,len));
// 释放Socket资源
s.close();
}
}
服务端代码
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class ServerDemo {
public static void main(String[] args) throws IOException {
// 接收客户端的 数据
ServerSocket ss = new ServerSocket(10010);
Socket s = ss.accept();
InputStream is = s.getInputStream();
byte[] bys = new byte[1024];
int len;
len = is.read(bys);
String str = new String(bys,0,len);
System.out.println(str);
// 将客户端的数据转成大写
String upperStr = str.toUpperCase();
// 从服务端向客户端 返回数据
OutputStream os = s.getOutputStream();
os.write(upperStr.getBytes());
s.close();
// 服务端的ServerSocket 可以不用释放资源
// ss.close();
}
}