Question

在java中怎样将一个字符串写如一个流中

Answer 1

可以使用DataoutputStream
比如
DataoutputStream dos = new DataOutputStream(client.getOutputStream()); //client是Socket对象
dos.writeUTF(str); //str为字符串对象

或者

Socket server = new Socket(InetAddress.getLocalHost(), 5678);
PrintWriter out = new PrintWriter(server.getOutputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
out.println(reader.readLine());