import cn.nukkit.network.protocol.BlockEntityDataPacket; //导入依赖的package包/类
public void spawnTo(Player player) {
    if (this.closed) {
        return;
    }

    CompoundTag tag = this.getSpawnCompound();
    BlockEntityDataPacket pk = new BlockEntityDataPacket();
    pk.x = (int) this.x;
    pk.y = (int) this.y;
    pk.z = (int) this.z;
    try {
        pk.namedTag = NBTIO.write(tag, ByteOrder.LITTLE_ENDIAN, true);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    player.dataPacket(pk);
}
 

import cn.nukkit.network.protocol.BlockEntityDataPacket; //导入依赖的package包/类
public void spawnTo(Player player) {
    if (this.closed) {
        return;
    }

    CompoundTag tag = this.getSpawnCompound();
    BlockEntityDataPacket pk = new BlockEntityDataPacket();
    pk.x = (int) this.x;
    pk.y = (int) this.y;
    pk.z = (int) this.z;
    try {
        pk.namedTag = NBTIO.write(tag, ByteOrder.LITTLE_ENDIAN);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    player.dataPacket(pk);
}
 

import cn.nukkit.network.protocol.BlockEntityDataPacket; //导入依赖的package包/类
@Override
  public void onOpen(Player who){
      this.holder = new WindowHolder(who.getFloorX(), who.getFloorY() - 3, who.getFloorZ(), this);
      WindowHolder holder = (WindowHolder) this.holder;
      UpdateBlockPacket pk = new UpdateBlockPacket();
      pk.records = new UpdateBlockPacket.Entry[]{new UpdateBlockPacket.Entry((int)holder.x, (int)holder.y, (int)holder.z, this.block, 0, UpdateBlockPacket.FLAG_ALL)};
      who.dataPacket(pk);
      CompoundTag c = new CompoundTag("")
          .putList(new ListTag<>("Items"))
          .putString("id", this.tile)
          .putInt("x", (int) holder.x)
          .putInt("y", (int) holder.y)
          .putInt("z", (int) holder.z);
      if(this.customName != ""){
          c.putString("CustomName", this.customName);
      }
try{
          BlockEntityDataPacket pk1 = new BlockEntityDataPacket();
          pk1.x = (int) holder.x;
          pk1.y = (int) holder.y;
          pk1.z = (int) holder.z;
          pk1.namedTag = NBTIO.write(c);
          who.dataPacket(pk1);
} catch(Exception e){
          who.getServer().getLogger().logException(e);
      }
      super.onOpen(who);
      this.sendContents(who);
  }
 

import cn.nukkit.network.protocol.BlockEntityDataPacket; //导入依赖的package包/类
@Override
  public void onOpen(Player who) {
      super.onOpen(who);

      UpdateBlockPacket updateBlockPacket = new UpdateBlockPacket();

// Place a chest block
      Vector3 v = new Vector3(who.getFloorX(), who.getFloorY() + 5, who.getFloorZ());
spawnedFakeChestBlocks.put(who.getName().toLowerCase(), v.clone());
      updateBlockPacket.x = (int) v.x;
      updateBlockPacket.y = (int) v.y;
      updateBlockPacket.z = (int) v.z;
      updateBlockPacket.blockId = Item.CHEST;
      updateBlockPacket.blockData = 0;
      updateBlockPacket.flags = UpdateBlockPacket.FLAG_ALL_PRIORITY;
      who.dataPacket(updateBlockPacket);

// Place chest data packet
      BlockEntityDataPacket blockEntityDataPacket = new BlockEntityDataPacket();
      blockEntityDataPacket.x = (int) v.x;
      blockEntityDataPacket.y = (int) v.y;
      blockEntityDataPacket.z = (int) v.z;

      try {
          blockEntityDataPacket.namedTag = NBTIO.write(getSpawnCompound(v), ByteOrder.LITTLE_ENDIAN);
      } catch (IOException e) {
	throw new RuntimeException(e);
      }

      who.dataPacket(blockEntityDataPacket);

// Open the chest
      ContainerOpenPacket containerOpenPacket = new ContainerOpenPacket();
      containerOpenPacket.windowid = (byte) who.getWindowId(this);
      containerOpenPacket.type = (byte) this.getType().getNetworkType();

      containerOpenPacket.x = (int) v.x;
      containerOpenPacket.y = (int) v.y;
      containerOpenPacket.z = (int) v.z;

      who.dataPacket(containerOpenPacket);

      this.sendContents(who);
  }