有什么方法可以解決不實現Serializable的類嗎？

Question

好的，所以我在存儲在文件中的HashMap中使用Bukkit的ItemStack並從文件中重新加載，但是我發現org.bukkit.craftbukkit.v1_4_6.inventory.CraftMetaItem用於ItemStack.serialize（ ）未實現Serializable。 有什么辦法可以解決這個問題？ 謝謝！

編輯：

這是我插件的代碼片段。 這是引發錯誤的部分。

public void onEnable(
{
public Map<NewItem, List<ItemStack>> items = new HashMap<NewItem, List<ItemStack>>();
//Add content to items...
}
public void onDisable()
  {
      try
        {
          Map<List<Map<String, Object>>, NewItem> smap = new HashMap<List<Map<String, Object>>, NewItem>();
          for(NewItem item : items.keySet())
         {
              List<ItemStack> stacks = items.get(item);
                List<Map<String, Object>> stacks2 = new ArrayList<Map<String, Object>>();
              for(ItemStack stack : stacks)
              {
                  stacks2.add(stack.serialize());
                }
              smap.put(stacks2, item);
           }
          SaveLoadAPI.save(smap, this.getDataFolder().getPath()+"\\Items.data");
       }
      catch (Exception e)
        {
          getLogger().severe("Was unable to save the items file to the default path of: "+this.getDataFolder().getPath()+"\\Items.data");
            e.printStackTrace();
       }
  }

最后但也是最不重要的是錯誤！

16:08:52 [SEVERE] java.io.NotSerializableException: org.bukkit.craftbukkit.v1_4_
6.inventory.CraftMetaItem
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeObject0(Unknown Sourc
e)
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeObject(Unknown Source
)
16:08:52 [SEVERE]       at java.util.HashMap.writeObject(Unknown Source)
16:08:52 [SEVERE]       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native M
ethod)
16:08:52 [SEVERE]       at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown S
ource)
16:08:52 [SEVERE]       at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unkno
wn Source)
16:08:52 [SEVERE]       at java.lang.reflect.Method.invoke(Unknown Source)
16:08:52 [SEVERE]       at java.io.ObjectStreamClass.invokeWriteObject(Unknown S
ource)
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeSerialData(Unknown So
urce)
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeOrdinaryObject(Unknow
n Source)
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeObject0(Unknown Sourc
e)
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeObject(Unknown Source
)
16:08:52 [SEVERE]       at java.util.ArrayList.writeObject(Unknown Source)
16:08:52 [SEVERE]       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native M
ethod)
16:08:52 [SEVERE]       at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown S
ource)
16:08:52 [SEVERE]       at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unkno
wn Source)
16:08:52 [SEVERE]       at java.lang.reflect.Method.invoke(Unknown Source)
16:08:52 [SEVERE]       at java.io.ObjectStreamClass.invokeWriteObject(Unknown S
ource)
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeSerialData(Unknown So
urce)
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeOrdinaryObject(Unknow
n Source)
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeObject0(Unknown Sourc
e)
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeObject(Unknown Source
)
16:08:52 [SEVERE]       at java.util.HashMap.writeObject(Unknown Source)
16:08:52 [SEVERE]       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native M
ethod)
16:08:52 [SEVERE]       at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown S
ource)
16:08:52 [SEVERE]       at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unkno
wn Source)
16:08:52 [SEVERE]       at java.lang.reflect.Method.invoke(Unknown Source)
16:08:52 [SEVERE]       at java.io.ObjectStreamClass.invokeWriteObject(Unknown S
ource)
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeSerialData(Unknown So
urce)
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeOrdinaryObject(Unknow
n Source)
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeObject0(Unknown Sourc
e)
16:08:52 [SEVERE]       at java.io.ObjectOutputStream.writeObject(Unknown Source
)
16:08:52 [SEVERE]       at com.tommy3244.plugins.MakeYourOwnBlocks.SaveLoadAPI.s
ave(SaveLoadAPI.java:16)
16:08:52 [SEVERE]       at com.tommy3244.plugins.MakeYourOwnBlocks.MakeYourOwnBl
ocks.onDisable(MakeYourOwnBlocks.java:86)
16:08:52 [SEVERE]       at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlug
in.java:219)
16:08:52 [SEVERE]       at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin
(JavaPluginLoader.java:481)
16:08:52 [SEVERE]       at org.bukkit.plugin.SimplePluginManager.disablePlugin(S
implePluginManager.java:400)
16:08:52 [SEVERE]       at org.bukkit.plugin.SimplePluginManager.disablePlugins(
SimplePluginManager.java:393)
16:08:52 [SEVERE]       at org.bukkit.plugin.SimplePluginManager.clearPlugins(Si
mplePluginManager.java:434)
16:08:52 [SEVERE]       at org.bukkit.craftbukkit.v1_4_6.CraftServer.reload(Craf
tServer.java:563)
16:08:52 [SEVERE]       at org.bukkit.Bukkit.reload(Bukkit.java:184)
16:08:52 [SEVERE]       at org.bukkit.command.defaults.ReloadCommand.execute(Rel
oadCommand.java:23)
16:08:52 [SEVERE]       at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCo
mmandMap.java:186)
16:08:52 [SEVERE]       at org.bukkit.craftbukkit.v1_4_6.CraftServer.dispatchCom
mand(CraftServer.java:514)
16:08:52 [SEVERE]       at org.bukkit.craftbukkit.v1_4_6.CraftServer.dispatchSer
verCommand(CraftServer.java:506)
16:08:52 [SEVERE]       at net.minecraft.server.v1_4_6.DedicatedServer.al(Dedica
tedServer.java:260)
16:08:52 [SEVERE]       at net.minecraft.server.v1_4_6.DedicatedServer.r(Dedicat
edServer.java:225)
16:08:52 [SEVERE]       at net.minecraft.server.v1_4_6.MinecraftServer.q(Minecra
ftServer.java:494)
16:08:52 [SEVERE]       at net.minecraft.server.v1_4_6.MinecraftServer.run(Minec
raftServer.java:427)
16:08:52 [SEVERE]       at net.minecraft.server.v1_4_6.ThreadServerApplication.r
un(SourceFile:849)

Answer 1

查看此帖子

如果您嘗試擴展不可序列化的類，則您繼承的所有字段（以及私有字段）都不會被序列化。 因此，不幸的是，擴展具有很多字段的類不是一種選擇。

如果對象org.bukkit.craftbukkit.v1_4_6.inventory.CraftMetaItem是一個字段，則可以將其標記為瞬態以避免序列化，如果不能解決問題，則可以嘗試實現write（）和read（）方法。 查看API以獲取更多信息。