Java与kryonet和slick2d获取序列化错误？

Question

我想执行这个服务器代码。

package server; 

import java.awt.event.WindowAdapter; 
import java.awt.event.WindowEvent; 
import java.io.IOException; 

import javax.swing.JFrame; 
import javax.swing.JOptionPane; 
import javax.swing.JScrollPane; 
import javax.swing.JTextArea; 

import org.apache.logging.log4j.message.Message; 

import com.esotericsoftware.kryo.Kryo; 
import com.esotericsoftware.kryonet.Server; 
import com.esotericsoftware.minlog.Log; 

import Client.PlayerChar; 
import NetworkClasses.LoginRequest; 
import NetworkClasses.LoginResponse; 

public class MainServer { 

    private int tcpPort; 
    private int udpPort; 
    public static Server server; 
    private Kryo kryo; 

    static JFrame jFrame; 
    static JTextArea jTextArea; 
    static MainServerListener listener = new MainServerListener(); 

    public MainServer(int tcpPort, int udpPort) { 
     this.tcpPort = tcpPort; 
     this.udpPort = udpPort; 
     server = new Server(); 

     kryo = server.getKryo(); 
     registerKryoClasses(); 
    } 

    public void startServer() { 
     Log.info("Starting Server"); 
     jTextArea.append("Starting Server..."); 
     jTextArea.append("\n"); 
     server.start(); 
     try { 
      server.bind(tcpPort, udpPort); 
      server.addListener(listener); 
      jTextArea.append("Server online! \n"); 
      jTextArea.append("----------------------------"); 
      jTextArea.append("\n"); 
      update(); 
     } catch (IOException e) { 
      Log.info("Port already used"); 
      jTextArea.append("Port already in use"); 
      jTextArea.append("\n"); 
      e.printStackTrace(); 
     } 
    } 

    // Try changing this to non staic and see where this effects our game 
    public static void stopServer() { 
     Log.info("Server stopped"); 
     jTextArea.append("Server stopped."); 
     jTextArea.append("\n"); 
     server.stop(); 
    } 

    public void update() { 
     while (true) { 

     } 
    } 

    private void registerKryoClasses() { 
     kryo.register(LoginRequest.class); 
     kryo.register(LoginResponse.class); 
     kryo.register(Message.class); 
     kryo.register(PlayerChar.class); 
     kryo.register(org.newdawn.slick.geom.Rectangle.class); 
     kryo.register(float[].class); 
     kryo.register(NetworkClasses.PacketUpdateX.class); 
     kryo.register(NetworkClasses.PacketUpdateY.class); 
     kryo.register(NetworkClasses.PacketAddPlayer.class); 
     kryo.register(NetworkClasses.PacketRemovePlayer.class); 

    } 

    public static void createServerInterface() { 
     jFrame = new JFrame("GameServerInterface"); 
     jTextArea = new JTextArea(); 
     jTextArea.append("\n"); 
     jTextArea.setLineWrap(true); 
     jTextArea.setEditable(false); 

     jFrame.add(jTextArea); 
     jFrame.setSize(400, 600); 
     jFrame.addWindowListener(new WindowAdapter() { 
      public void windowClosing(WindowEvent e) { 
       int i = JOptionPane.showConfirmDialog(null, "You want to shut down the server?"); 
       if(i == 0) { 
        stopServer(); 
        System.exit(0); // successful exit 
       } 
      } 
     }); 

     JScrollPane scrollPane = new JScrollPane(jTextArea); 
     scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS); 
     scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); 
     jFrame.add(scrollPane); 
    } 

    public static void main(String args[]) { 
     Log.set(Log.LEVEL_INFO); 

     MainServer main = new MainServer(55555, 55556); 
     createServerInterface(); 
     main.startServer(); 
    } 

} // end total class 

完整的源代码是Github。但是，当我尝试运行此服务器时，我一直收到此错误/异常，并且根本没有在线解决方案。我该如何解决这个问题？

Exception in thread "main" java.lang.IllegalArgumentException: Unable to create serializer "com.esotericsoftware.kryo.serializers.FieldSerializer" for class: com.esotericsoftware.kryonet.FrameworkMessage$RegisterTCP 
    at com.esotericsoftware.kryo.Kryo.newSerializer(Kryo.java:337) 
    at com.esotericsoftware.kryo.Kryo.newDefaultSerializer(Kryo.java:316) 
    at com.esotericsoftware.kryo.Kryo.getDefaultSerializer(Kryo.java:309) 
    at com.esotericsoftware.kryo.Kryo.register(Kryo.java:353) 
    at com.esotericsoftware.kryonet.KryoSerialization.<init>(KryoSerialization.java:33) 
    at com.esotericsoftware.kryonet.KryoSerialization.<init>(KryoSerialization.java:25) 
    at com.esotericsoftware.kryonet.Server.<init>(Server.java:91) 
    at com.esotericsoftware.kryonet.Server.<init>(Server.java:73) 
    at server.MainServer.<init>(MainServer.java:36) 
    at server.MainServer.main(MainServer.java:118) 
Caused by: java.lang.reflect.InvocationTargetException 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) 
    at java.lang.reflect.Constructor.newInstance(Unknown Source) 
    at com.esotericsoftware.kryo.Kryo.newSerializer(Kryo.java:324) 
    ... 9 more 
Caused by: java.lang.IncompatibleClassChangeError: Found interface org.objectweb.asm.MethodVisitor, but class was expected 
    at com.esotericsoftware.reflectasm.FieldAccess.insertConstructor(FieldAccess.java:144) 
    at com.esotericsoftware.reflectasm.FieldAccess.get(FieldAccess.java:109) 
    at com.esotericsoftware.kryo.serializers.FieldSerializer.rebuildCachedFields(FieldSerializer.java:104) 
    at com.esotericsoftware.kryo.serializers.FieldSerializer.<init>(FieldSerializer.java:50) 
    ... 14 more 

Answer 1

我在互联网的角落在线和地方抬头，我发现我需要进口kryonet后导入LWJGL或slick2d库。希望它能帮助别人。