Can somebody help me to generate QR code in Minecraft?

I'm going to make QR code in Minecraft using bukkit by Zxing QR code generator. so I coded like this:

Code:

package me.QRcode;

import java.util.EnumMap;
import java.util.Map;

import org.bukkit.ChatColor;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.plugin.java.JavaPlugin;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
public class Main extends JavaPlugin implements Listener{
   
    public void onEnable() {
        getServer().
            getConsoleSender().
                sendMessage(ChatColor.GREEN + "\n\n\"QR code\" plugin has been enabled.\n\n");
    }
   
    public void onDisable() {
        getServer().
            getConsoleSender().
                sendMessage(ChatColor.RED + "\n\n\"QR code\" plugin has been disabled.\n\n");
    }
   
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        Player player = (Player) sender;
       
        if(sender instanceof Player) {
            String commandInput = cmd.getName().toLowerCase();
           
            switch(commandInput) {
                case "qrcodegen":
                    Location pLoc = player.getLocation();
                    if(args.length == 0) {
                        sender.sendMessage(ChatColor.RED + "Usage: /qrcodegen <text>");
                    }
                    else {
                        String myCodeText = String.join(" ",args);
                        int size = 20;
                        try {
                            Map<EncodeHintType, Object> hintMap = new EnumMap<EncodeHintType, Object>(EncodeHintType.class);
                            hintMap.put(EncodeHintType.CHARACTER_SET, "UTF-8");
                           
                            hintMap.put(EncodeHintType.MARGIN, 1);
                            hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
                
                            QRCodeWriter qrCodeWriter = new QRCodeWriter();
                            BitMatrix byteMatrix = qrCodeWriter.encode(myCodeText, BarcodeFormat.QR_CODE, size, size, hintMap);
                            int CrunchifyWidth = byteMatrix.getWidth();
                           
                            Material White = Material.WHITE_CONCRETE;
                            Material Black = Material.BLACK_CONCRETE;
                           
                            for (int i = 0; i < CrunchifyWidth; i++) {
                                for (int j = 0; j < CrunchifyWidth; j++) {
                                    if (byteMatrix.get(i, j)) {
                                        player.getWorld().getBlockAt(pLoc.add(i,0,j)).setType(Black);
                                    }
                                    else {
                                        player.getWorld().getBlockAt(pLoc.add(i,0,j)).setType(White);
                                    }
                                }
                                System.out.println();
                            }
                        } catch (WriterException e) {
                            e.printStackTrace();
                        }
                    }
                    return true;
            }
        }
        return false;
    }
    // Used External JARs : Bukkit 1.13.1, Zxing 3.3.3
}

plugin.yml:

Code:

name: QRCodeGenerator
author: tf2_mandeokyi
version: 1.0
main: me.QRcode.Main
description: in Minecraft

api-version: 1.13

commands:
  qrcodegen:
    description: It generates QR code at where you are standing.
    usage: /qrcodegen <text>

but this error occurs.

Code:

org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: com/google/zxing/WriterException
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:326) ~[craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:248) [craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at org.bukkit.craftbukkit.v1_13_R2.CraftServer.loadPlugins(CraftServer.java:315) [craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at org.bukkit.craftbukkit.v1_13_R2.CraftServer.reload(CraftServer.java:775) [craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at org.bukkit.Bukkit.reload(Bukkit.java:537) [craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:27) [craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) [craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at org.bukkit.craftbukkit.v1_13_R2.CraftServer.dispatchCommand(CraftServer.java:675) [craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at org.bukkit.craftbukkit.v1_13_R2.CraftServer.dispatchServerCommand(CraftServer.java:661) [craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at net.minecraft.server.v1_13_R2.DedicatedServer.aU(DedicatedServer.java:417) [craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:377) [craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:792) [craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:695) [craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]
Caused by: java.lang.NoClassDefFoundError: com/google/zxing/WriterException
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_181]
        at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_181]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:54) ~[craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        ... 14 more
Caused by: java.lang.ClassNotFoundException: com.google.zxing.WriterException
        at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_181]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:130) ~[craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:76) ~[craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_181]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_181]
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_181]
        at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_181]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:54) ~[craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[craftbukkit-1.13.1.jar:git-Bukkit-4228a56]
        ... 14 more

It seems that there is no class "com.google.zxing.WriterException" what it really exists. Can somebody help me solving this error?
(QR code generator example code)
(Zxing 3.3.3 download link)

 

Uhmm.... How to do that?

 

Intellij has an option in Project Structure -> Artifacts -> Output Layout, where you add your available Element (in this case zxing)

 

I'm using Eclipse, but I can't find that option. Where is it?