反序列化时引发java ClassNotFoundException
我一直在尝试从bukkit（minecraft）插件中序列化一个向量
这是我要序列化的类：
package net.cerberusstudios.llama.runecraft.neat;
import org.bukkit.util.Vector;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
/**
* Created by Josiah on 5/11/2015 based on Runix
*/
public class Vector3 extends Vector implements Externalizable {
private static final long serialVersionUID = 5312566205481472598L;
public static final Vector3 UP = new Vector3(0, 1,0);
public static final Vector3 DOWN = new Vector3(0,-1,0);
public static final Vector3 NORTH = new Vector3(0,0,-1);
public static final Vector3 EAST = new Vector3( 1,0,0);
public static final Vector3 SOUTH = new Vector3(0,0, 1);
public static final Vector3 WEST = new Vector3(-1,0,0);
public static final Vector3 NONE = new Vector3(0,0,0);
//These map to the minecraft block face, such that you're standing on the side they are pointing
public static final Vector3[] facing = {DOWN, UP, EAST, WEST, NORTH, SOUTH};//NORTH, SOUTH, WEST, EAST};
// Runecraft: 0(down) 1(up) 2(east) 3(west) 4(north) 5(south)
//use like this: WorldXYZ point = point.offset(Vector3.facing[point.face])
public static final String[] faceString = {"Down", "Up", "East", "West", "North", "South"};
//Converts a side to the opposite side. This is the same as XOR'ing it with 1.
public static final int[] oppositeSide = new int[]{1, 0, 3, 2, 5, 4};
public static final Vector3[] xzRotationOrder = {Vector3.NORTH, Vector3.EAST, Vector3.SOUTH, Vector3.WEST,};
public static final Vector3[] xyRotationOrder = {Vector3.UP, Vector3.EAST, Vector3.DOWN, Vector3.WEST,};
public static final Vector3[] yzRotationOrder = {Vector3.NORTH, Vector3.UP, Vector3.SOUTH, Vector3.DOWN,};
public static final Vector3[] conductanceNeighbors = {
new Vector3( 0, 1, 0),
new Vector3( 0,-1, 0),
new Vector3( 0, 0,-1),
new Vector3( 1, 0, 0),
new Vector3( 0, 0, 1),
new Vector3(-1, 0, 0),
new Vector3( 1, 1, 0),
new Vector3(-1, 1, 0),
new Vector3( 0, 1, 1),
new Vector3( 0, 1,-1),
new Vector3( 1, 0, 1),
new Vector3(-1, 0, 1),
new Vector3( 1, 0,-1),
new Vector3(-1, 0,-1),
new Vector3( 1,-1, 0),
new Vector3(-1,-1, 0),
new Vector3( 0,-1, 1),
new Vector3( 0,-1,-1)};
public Vector3(int mx, int my, int mz){
this.x = mx;
this.y = my;
this.z = mz;
}
/** Returns a difference vector such that reference + vector = destination */
public Vector3(WorldXYZ reference, WorldXYZ destination){
x = (int) (destination.getX() - reference.getX());
y = (int) (destination.getY() - reference.getY());
z = (int) (destination.getZ() - reference.getZ());
}
public Vector3(Vector face)
{
x = (int) face.getX();
y = (int) face.getY();
z = (int) face.getZ();
}
public String toString(){
return "\"x\":"+x + ", \"y\":" + y + ", \"z\":" + z;
}
public Vector3 multiply(int m) {
return new Vector3(intX()*m, intY()*m, intZ()*m);
}
public int intX() { return (int)x; }
public int intY() { return (int)y; }
public int intZ() { return (int)z; }
/**
* The object implements the writeExternal method to save its contents
* by calling the methods of DataOutput for its primitive values or
* calling the writeObject method of ObjectOutput for objects, strings,
* and arrays.
*
* @param out the stream to write the object to
*
* @throws IOException Includes any I/O exceptions that may occur
* @serialData Overriding methods should use this tag to describe
* the data layout of this Externalizable object.
* List the sequence of element types and, if possible,
* relate the element to a public/protected field and/or
* method of this Externalizable class.
*/
@Override
public void writeExternal(ObjectOutput out) throws IOException {
out.writeDouble(x);
out.writeDouble(y);
out.writeDouble(z);
}
/**
* The object implements the readExternal method to restore its
* contents by calling the methods of DataInput for primitive
* types and readObject for objects, strings and arrays. The
* readExternal method must read the values in the same sequence
* and with the same types as were written by writeExternal.
*
* @param in the stream to read data from in order to restore the object
*
* @throws IOException if I/O errors occur
* @throws ClassNotFoundException If the class for an object being
* restored cannot be found.
*/
@Override
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
x = in.readDouble();
y = in.readDouble();
z = in.readDouble();
}
}
我用来测试序列化的代码是：
Object serializeTest = SerializationUtils.clone(new Vector3(1,1,1));
这就是我得到的错误：
[16:48:03] [Server thread/ERROR]: Could not pass event PlayerInteractEvent to Runecraft v3.0
org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:297) ~[craftbukkit-1.8.jar:git-Bukkit-1092acb]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit-1.8.jar:git-Bukkit-1092acb]
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [craftbukkit-1.8.jar:git-Bukkit-1092acb]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [craftbukkit-1.8.jar:git-Bukkit-1092acb]
at org.bukkit.craftbukkit.v1_8_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:209) [craftbukkit-1.8.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.PlayerInteractManager.interact(PlayerInteractManager.java:462) [craftbukkit-1.8.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:693) [craftbukkit-1.8.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:50) [craftbukkit-1.8.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.PacketPlayInBlockPlace.a(PacketPlayInBlockPlace.java:80) [craftbukkit-1.8.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) [craftbukkit-1.8.jar:git-Bukkit-1092acb]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_25]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_25]
at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:643) [craftbukkit-1.8.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:284) [craftbukkit-1.8.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:598) [craftbukkit-1.8.jar:git-Bukkit-1092acb]
at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:506) [craftbukkit-1.8.jar:git-Bukkit-1092acb]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_25]
Caused by: org.apache.commons.lang.SerializationException: java.lang.ClassNotFoundException: net.cerberusstudios.llama.runecraft.neat.Vector3
at org.apache.commons.lang.SerializationUtils.deserialize(SerializationUtils.java:166) ~[craftbukkit-1.8.jar:git-Bukkit-1092acb]
at org.apache.commons.lang.SerializationUtils.deserialize(SerializationUtils.java:193) ~[craftbukkit-1.8.jar:git-Bukkit-1092acb]
at net.cerberusstudios.llama.runecraft.Runecraft_MAIN.exportFaith(Runecraft_MAIN.java:7119) ~[?:?]
at net.cerberusstudios.llama.runecraft.Runecraft_MAIN.masterRuneFunctionExecute(Runecraft_MAIN.java:5383) ~[?:?]
at net.cerberusstudios.llama.runecraft.Runecraft_MAIN.onRightClick(Runecraft_MAIN.java:442) ~[?:?]
at net.cerberusstudios.llama.runecraft.Runecraft.onPlayerInteract(Runecraft.java:367) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_25]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_25]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_25]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_25]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:295) ~[craftbukkit-1.8.jar:git-Bukkit-1092acb]
... 16 more
Caused by: java.lang.ClassNotFoundException: net.cerberusstudios.llama.runecraft.neat.Vector3
at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_25]
at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.8.0_25]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_25]
at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_25]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_25]
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[?:1.8.0_25]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_25]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_25]
at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_25]
at java.io.ObjectInputStream.resolveClass(Unknown Source) ~[?:1.8.0_25]
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source) ~[?:1.8.0_25]
at java.io.ObjectInputStream.readClassDesc(Unknown Source) ~[?:1.8.0_25]
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) ~[?:1.8.0_25]
at java.io.ObjectInputStream.readObject0(Unknown Source) ~[?:1.8.0_25]
at java.io.ObjectInputStream.readObject(Unknown Source) ~[?:1.8.0_25]
at org.apache.commons.lang.SerializationUtils.deserialize(SerializationUtils.java:163) ~[craftbukkit-1.8.jar:git-Bukkit-1092acb]
at org.apache.commons.lang.SerializationUtils.deserialize(SerializationUtils.java:193) ~[craftbukkit-1.8.jar:git-Bukkit-1092acb]
at net.cerberusstudios.llama.runecraft.Runecraft_MAIN.exportFaith(Runecraft_MAIN.java:7119) ~[?:?]
at net.cerberusstudios.llama.runecraft.Runecraft_MAIN.masterRuneFunctionExecute(Runecraft_MAIN.java:5383) ~[?:?]
at net.cerberusstudios.llama.runecraft.Runecraft_MAIN.onRightClick(Runecraft_MAIN.java:442) ~[?:?]
at net.cerberusstudios.llama.runecraft.Runecraft.onPlayerInteract(Runecraft.java:367) ~[?:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_25]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_25]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_25]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_25]
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:295) ~[craftbukkit-1.8.jar:git-Bukkit-1092acb]
... 16 more
我一直在四处寻找，似乎it找不到该类，因为它们没有在类路径中引用，我认为这并没有多大意义，因为它们来自我正在进行的项目
我也在考虑将其转换为JSON而不是序列化，这是一种更好的方法吗
# 1 楼答案
老实说，在我看来，一切都比输出原始对象要好。 我使用XML来使用库XStream序列化我的大多数对象