1.21.1 Support?

[starmc63]

package cn.edenetwk.mCAReader;

import net.querz.mca.MCAFile;
import net.querz.mca.MCAUtil;
import net.querz.nbt.tag.CompoundTag;
import org.bukkit.Bukkit;
import org.bukkit.Chunk;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Entity;
import org.bukkit.entity.EntityType;
import org.bukkit.plugin.java.JavaPlugin;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class MCAReader extends JavaPlugin implements CommandExecutor {

@Override
public void onEnable() {
    this.getCommand("readregion").setExecutor(this);
    this.getCommand("readentities").setExecutor(this);
}

@Override
public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
    if (!sender.isOp()) return true;
    if (args.length != 2) {
        sender.sendMessage("使用方法: /" + label + " <文件路径> <世界名>");
        return true;
    }

    String filePath = args[0];
    String worldName = args[1];
    File file = new File(getDataFolder(), filePath);

    if (!file.exists()) {
        sender.sendMessage("文件不存在: " + filePath);
        return true;
    }

    if (label.equalsIgnoreCase("readregion")) {
        readRegionFile(file, worldName, sender);
    } else if (label.equalsIgnoreCase("readentities")) {
        //readEntitiesFile(file, worldName, sender);
    }

    return true;
}

private void readRegionFile(File file, String worldName, CommandSender sender) {
    String fileName = file.getName();

    // 去掉文件扩展名
    String baseName = fileName.substring(0, fileName.lastIndexOf('.')); // "r.3.4"

    // 分割文件名以提取x和z坐标
    String[] coordinates = baseName.split("\\."); // ["r", "3", "4"]

    // 提取x和z坐标
    int mcaX = Integer.parseInt(coordinates[1]); // x = 3
    int mcaZ = Integer.parseInt(coordinates[2]); // z = 4

    try {
        MCAFile mcaFile = MCAUtil.read(file);
        for (int x = 0; x < 32; x++) {
            for (int z = 0; z < 32; z++) {
                net.querz.mca.Chunk chunk =  mcaFile.getChunk(mcaX*32+x, mcaZ*32+z);

                if (chunk != null) {
                    // 遍历高度范围
                    for (int blockX = 0; blockX < 16; blockX++) {
                        for (int blockZ = 0; blockZ < 16; blockZ++) {
                            for (int blockY = 0; blockY < 256; blockY++) {
                                // 获取块状态
                                CompoundTag blockState = chunk.getBlockStateAt(blockX, blockY, blockZ);
                                if (blockState != null) {
                                    String materialName = blockState.getString("Name");
                                    Material material = Material.matchMaterial(materialName);

                                    if (material != null) {
                                        int worldX = mcaX*512+x*16+blockX;
                                        int worldZ=mcaZ*512+z*16+blockZ;
                                        int finalBlockY = blockY;
                                        Bukkit.getRegionScheduler().run(this,new Location(Bukkit.getWorld(worldName),worldX,blockY,worldZ), task->{
                                            Bukkit.getWorld(worldName).getBlockAt(worldX, finalBlockY,worldZ).setType(material);
                                        });
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
        sender.sendMessage("区块数据已替换。");
    } catch (IOException e) {
        sender.sendMessage("读取文件失败: " + e.getMessage());
    }
}

/*private void readEntitiesFile(File file, String worldName, CommandSender sender) {
    try {
        MCAFile mcaFile = MCAUtil.readMCAFile(file.getPath());
        for (ReadWriteNBT entity : mcaFile.getEntities()) {
            EntityType entityType = EntityType.fromName(entity.getString("id"));
            if (entityType != null) {
                double x = entity.getDouble("x");
                double y = entity.getDouble("y");
                double z = entity.getDouble("z");
                Bukkit.getWorld(worldName).spawnEntity(new org.bukkit.Location(Bukkit.getWorld(worldName), x, y, z), entityType);
            }
        }
        sender.sendMessage("实体数据已替换。");
    } catch (IOException e) {
        sender.sendMessage("读取文件失败: " + e.getMessage());
    }
}*/

}
[20:50:29 ERROR]: Command exception: /readregion r.0.0.mca world
org.bukkit.command.CommandException: Unhandled exception executing command 'readregion' in plugin MCAReader v1.0-SNAPSHOT
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[paper-mojangapi-1.21.1-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.command.brigadier.bukkit.BukkitCommandNode$BukkitBrigCommand.run(BukkitCommandNode.java:91) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at com.mojang.brigadier.context.ContextChain.runExecutable(ContextChain.java:73) ~[brigadier-1.3.10.jar:?]
at net.minecraft.commands.execution.tasks.ExecuteCommand.execute(ExecuteCommand.java:31) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at net.minecraft.commands.execution.tasks.ExecuteCommand.execute(ExecuteCommand.java:19) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at net.minecraft.commands.execution.UnboundEntryAction.lambda$bind$0(UnboundEntryAction.java:8) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at net.minecraft.commands.execution.CommandQueueEntry.execute(CommandQueueEntry.java:5) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at net.minecraft.commands.execution.ExecutionContext.runCommandQueue(ExecutionContext.java:103) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at net.minecraft.commands.Commands.executeCommandInContext(Commands.java:443) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at net.minecraft.commands.Commands.performCommand(Commands.java:350) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at net.minecraft.commands.Commands.performCommand(Commands.java:337) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at net.minecraft.commands.Commands.performCommand(Commands.java:332) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at net.minecraft.server.network.ServerGamePacketListenerImpl.performUnsignedChatCommand(ServerGamePacketListenerImpl.java:2274) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at net.minecraft.server.network.ServerGamePacketListenerImpl.lambda$handleChatCommand$14(ServerGamePacketListenerImpl.java:2248) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at net.minecraft.server.network.ServerGamePacketListenerImpl.lambda$tryHandleChat$17(ServerGamePacketListenerImpl.java:2412) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at io.papermc.paper.threadedregions.EntityScheduler.executeTick(EntityScheduler.java:181) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1711) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at io.papermc.paper.threadedregions.TickRegions$ConcreteRegionTickHandle.tickRegion(TickRegions.java:407) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at io.papermc.paper.threadedregions.TickRegionScheduler$RegionScheduleHandle.runTick(TickRegionScheduler.java:459) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at ca.spottedleaf.concurrentutil.scheduler.SchedulerThreadPool$TickThreadRunner.run(SchedulerThreadPool.java:546) ~[luminol-1.21.1.jar:1.21.1-DEV-dacd3c5]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.IllegalArgumentException: data does not contain "Level" tag
at mcareader-1.0-SNAPSHOT.jar/net.querz.mca.Chunk.initReferences(Chunk.java:78) ~[mcareader-1.0-SNAPSHOT.jar:?]
at mcareader-1.0-SNAPSHOT.jar/net.querz.mca.Chunk.deserialize(Chunk.java:184) ~[mcareader-1.0-SNAPSHOT.jar:?]
at mcareader-1.0-SNAPSHOT.jar/net.querz.mca.MCAFile.deserialize(MCAFile.java:66) ~[mcareader-1.0-SNAPSHOT.jar:?]
at mcareader-1.0-SNAPSHOT.jar/net.querz.mca.MCAUtil.read(MCAUtil.java:60) ~[mcareader-1.0-SNAPSHOT.jar:?]
at mcareader-1.0-SNAPSHOT.jar/net.querz.mca.MCAUtil.read(MCAUtil.java:36) ~[mcareader-1.0-SNAPSHOT.jar:?]
at mcareader-1.0-SNAPSHOT.jar/cn.edenetwk.mCAReader.MCAReader.readRegionFile(MCAReader.java:70) ~[mcareader-1.0-SNAPSHOT.jar:?]
at mcareader-1.0-SNAPSHOT.jar/cn.edenetwk.mCAReader.MCAReader.onCommand(MCAReader.java:48) ~[mcareader-1.0-SNAPSHOT.jar:?]
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[paper-mojangapi-1.21.1-R0.1-SNAPSHOT.jar:?]
... 20 more

[HoldYourWaffle]

You might be interested in @ens-gijs's fork, see #68.