Java callback回调

package com.callback;

public interface CSCallBack {
  public void process(String status);
}

package com.callback;

public class Client implements CSCallBack {

  private Server server;

  public Client(Server server) {
      this.server = server;
  }

  public void sendMsg(final String msg){
      System.out.println("客户端：发送的消息为：" + msg);
      new Thread(new Runnable() {
          @Override
          public void run() {
              server.getClientMsg(Client.this,msg);
          }
      }).start();
      System.out.println("客户端：异步发送成功");
  }

  @Override
  public void process(String status) {
      System.out.println("客户端：服务端回调状态为：" + status);
  }
}

package com.callback;

public class Server {

  public void getClientMsg(CSCallBack csCallBack , String msg) {
      System.out.println("服务端：服务端接收到客户端发送的消息为:" + msg);

      // 模拟服务端需要对数据处理
      try {
          Thread.sleep(5 * 1000);
      } catch (InterruptedException e) {
          e.printStackTrace();
      }
      System.out.println("服务端:数据处理成功，返回成功状态 200");
      String status = "200";
      csCallBack.process(status);
  }
}

package com.callback;

public class CallBackTest {
  public static void main(String[] args) {
      Server server = new Server();
      Client client = new Client(server);

      client.sendMsg("Server,Hello~");
  }
}