客户端2，要继续加就起个名字就行

client2.java

@@ -0,0 +1,30 @@
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.io.OutputStreamWriter;
+import java.net.Socket;
+import java.util.Scanner;
+
+public class client2 {
+    static Scanner sc = new Scanner(System.in);
+    public static void main(String[] args) throws IOException {
+        Socket socket = new Socket("127.0.0.1", 10005);
+
+        new Thread(new clientRunable2(socket)).start();
+        talk(socket);
+    }
+
+    private static void talk(Socket socket) throws IOException {
+        System.out.println("请输入你的用户名：");
+        String peoplename=sc.nextLine();
+        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
+
+        while (true) {
+            System.out.println("请输入您要说的话");
+            String str = sc.nextLine();
+            //把聊天内容写给服务器
+            bw.write(peoplename+":"+str);
+            bw.newLine();
+            bw.flush();
+        }
+    }
+}