import java.io.*;
import java.net.*;
public class TestServer { public static void main(String[] args) {
try {
ServerSocket ss = new ServerSocket(6666);
while(true){
//获得监听
Socket s1 = ss.accept();
InputStream is = s1.getInputStream();
DataInputStream dis = new DataInputStream (is);
OutputStream os = s1.getOutputStream();
DataOutputStream dos = new DataOutputStream(os);
//得到Client的输入
System.out.println(dis.readUTF());
String in = dis.readUTF();
String out = in.toUpperCase();
//输出内容
dos.writeUTF(out);
dos.flush();
dos.close();
os.close();
dis.close();
is.close();
s1.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}}
import java.io.*;
import java.net.*;public class TestClient { public static void main(String[] args) {
try
{
Socket s = new Socket("192.168.1.100",6666);
//标准输入流,通过键盘输入
System.out.println("请输入...");
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String line = br.readLine();
//输出内容
OutputStream os = s.getOutputStream();
DataOutputStream ds = new DataOutputStream(os);
ds.writeUTF(line);
ds.flush();
//获得Server的内容
InputStream is = s.getInputStream();
DataInputStream bis = new DataInputStream(is);
System.out.println(bis.readUTF());
bis.close();
is.close();
ds.close();
os.close();
br.close();
s.close();
}catch(IOException e){
e.printStackTrace();
}
}}
为什么Server可以收到Client的,而进行转换之后却不能返回,client收不到server的??
//得到Client的输入
System.out.println(dis.readUTF());
String in = dis.readUTF();
String out = in.toUpperCase();改成://得到Client的输入
String in = dis.readUTF();
System.out.println(in); String out = in.toUpperCase();