Question

我正在尝试将java片段编译成jar文件，我遇到了经典的Java运行时异常，但我无法解决问题。这是从Markus Wulftange那里借来的代码：

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Arrays;

import flex.messaging.io.SerializationContext;
import flex.messaging.io.amf.ActionContext;
import flex.messaging.io.amf.ActionMessage;
import flex.messaging.io.amf.AmfMessageDeserializer;
import flex.messaging.io.amf.AmfMessageSerializer;
import flex.messaging.io.amf.MessageBody;

public class Amf3ExternalizableUnicastRef {

public static void main(String[] args) throws IOException, ClassNotFoundException {
    if (args.length < 2 || (args.length == 3 && !args[0].equals("-d"))) {
        System.err.println("usage: java -jar " + Amf3ExternalizableUnicastRef.class.getSimpleName() + ".jar [-d] <host> <port>");
        return;
    }
    boolean doDeserialize = false;
    if (args.length == 3) {
        doDeserialize = true;
        args = Arrays.copyOfRange(args, 1, args.length);
    }

    // generate the UnicastRef object
    Object unicastRef = generateUnicastRef(args[0], Integer.parseInt(args[1]));

    // serialize object to AMF message
    byte[] amf = serialize(unicastRef);

    // deserialize AMF message
    if (doDeserialize) {
        deserialize(amf);
    } else {
        System.out.write(amf);
    }
}

public static Object generateUnicastRef(String host, int port) {
    java.rmi.server.ObjID objId = new java.rmi.server.ObjID();
    sun.rmi.transport.tcp.TCPEndpoint endpoint = new sun.rmi.transport.tcp.TCPEndpoint(host, port);
    sun.rmi.transport.LiveRef liveRef = new sun.rmi.transport.LiveRef(objId, endpoint, false);
    return new sun.rmi.server.UnicastRef(liveRef);
}

public static byte[] serialize(Object data) throws IOException {
    MessageBody body = new MessageBody();
    body.setData(data);

    ActionMessage message = new ActionMessage();
    message.addBody(body);

    ByteArrayOutputStream out = new ByteArrayOutputStream();

    AmfMessageSerializer serializer = new AmfMessageSerializer();
    serializer.initialize(SerializationContext.getSerializationContext(), out, null);
    serializer.writeMessage(message);

    return out.toByteArray();
}

public static void deserialize(byte[] amf) throws ClassNotFoundException, IOException {
    ByteArrayInputStream in = new ByteArrayInputStream(amf);

    AmfMessageDeserializer deserializer = new AmfMessageDeserializer();
    deserializer.initialize(SerializationContext.getSerializationContext(), in, null);
    deserializer.readMessage(new ActionMessage(), new ActionContext());
  }
}

使用位于同一目录下的flex-messaging-core包，我编译成了一个带有的jar javac -cp flex...jar sourcefile.java.

然后编译成jar jar -cfm myjar.jar MANIFEST.ML myclass.class。

但是，当从具有适当参数的shell运行时 java -jar myjar.jar -d 127.0.0.1 8000 它在threadmain java.lang.NoClassDefFoundError : flex/messaging/io/amf/MessageBody中抛出异常。

我用Google搜索并尝试了所有解决方案2天，但实际上我自己无法解决问题，请问一点帮助？

Answer 1

不是MANIFEST.MF，不是MANIFEST.ML吗？

Java NoClassDefFoundError amf

1 个答案: