我们的最终目的是在拍卖行脚本里增加一个菜单项，通过这个菜单进入MapleStory原始的拍卖界面

视频演示： https://www.bilibili.com/video/BV1RmZLBUEBU/

原本点击拍卖按钮是进入拍卖界面的，北斗做了处理改为呼出拍卖行脚本（9900001.js），我们现在需要找到原始进入拍卖界面的方法。

因此，通过现象找代码，我们需要在服务端搜索 9900001（范围限定在java文件）

于是找到常量

public static final int BEI_DOU_NPC_BASE = 9900001;

然后查看在哪里引用了这个常量，最后定位到了 EnterMTSHandler，于是我们就找到了进入拍卖界面的方法。

观察 handler 方法，这一段

if (!GameConfig.getServerBoolean("use_mts")) {  
    openCenterScript(c);  
    return;  
}

就是北斗的修改，如果配置项中没有启用拍卖则打开拍卖行脚本。在这一段之后的代码就是原来的呼出拍卖界面的代码。

那我们只需要将这段代码抽离出来给脚本调用就可以实现最初说的目的了。

最终修改方法

编辑 gms-server/src/main/java/org/gms/client/Character.java

添加三个方法

public void enterMTS(Client c) {  
    Character chr = this;  
  
    if (chr.getEventInstance() != null) {  
        c.sendPacket(PacketCreator.serverNotice(5, "Entering Cash Shop or MTS are disabled when registered on an event."));  
        c.sendPacket(PacketCreator.enableActions());  
        return;  
    }  
  
    if (MiniDungeonInfo.isDungeonMap(chr.getMapId())) {  
        c.sendPacket(PacketCreator.serverNotice(5, "Changing channels or entering Cash Shop or MTS are disabled when inside a Mini-Dungeon."));  
        c.sendPacket(PacketCreator.enableActions());  
        return;  
    }  
  
    if (FieldLimit.CANNOTMIGRATE.check(chr.getMap().getFieldLimit())) {  
        chr.dropMessage(1, "You can't do it here in this map.");  
        c.sendPacket(PacketCreator.enableActions());  
        return;  
    }  
  
    if (!chr.isAlive()) {  
        c.sendPacket(PacketCreator.enableActions());  
        return;  
    }  
    if (chr.getLevel() < 10) {  
        c.sendPacket(PacketCreator.blockedMessage2(5));  
        c.sendPacket(PacketCreator.enableActions());  
        return;  
    }  
  
    chr.closePlayerInteractions();  
    chr.closePartySearchInteractions();  
  
    chr.unregisterChairBuff();  
    Server.getInstance().getPlayerBuffStorage().addBuffsToStorage(chr.getId(), chr.getAllBuffs());  
    Server.getInstance().getPlayerBuffStorage().addDiseasesToStorage(chr.getId(), chr.getAllDiseases());  
    chr.setAwayFromChannelWorld();  
    chr.notifyMapTransferToPartner(-1);  
    chr.removeIncomingInvites();  
    chr.cancelAllBuffs(true);  
    chr.cancelAllDebuffs();  
    chr.cancelBuffExpireTask();  
    chr.cancelDiseaseExpireTask();  
    chr.cancelSkillCooldownTask();  
    chr.cancelExpirationTask();  
  
    chr.forfeitExpirableQuests();  
    chr.cancelQuestExpirationTask();  
  
    chr.saveCharToDB();  
  
    c.getChannelServer().removePlayer(chr);  
    chr.getMap().removePlayer(c.getPlayer());  
    try {  
        c.sendPacket(PacketCreator.openCashShop(c, true));  
    } catch (Exception ex) {  
        ex.printStackTrace();  
    }  
    chr.getCashShop().open(true);// xD  
    c.enableCSActions();  
    c.sendPacket(PacketCreator.MTSWantedListingOver(0, 0));  
    c.sendPacket(PacketCreator.showMTSCash(c.getPlayer()));  
    List<MTSItemInfo> items = new ArrayList<>();  
    int pages = 0;  
    try (Connection con = DatabaseConnection.getConnection()) {  
        try (PreparedStatement ps = con.prepareStatement("SELECT * FROM mts_items WHERE tab = 1 AND transfer = 0 ORDER BY id DESC LIMIT 16, 16");  
             ResultSet rs = ps.executeQuery()) {  
            while (rs.next()) {  
                if (rs.getInt("type") != 1) {  
                    Item i = new Item(rs.getInt("itemid"), (short) 0, (short) rs.getInt("quantity"));  
                    i.setOwner(rs.getString("owner"));  
                    items.add(new MTSItemInfo(i, rs.getInt("price") + 100 + (int) (rs.getInt("price") * 0.1), rs.getInt("id"), rs.getInt("seller"), rs.getString("sellername"), rs.getString("sell_ends")));  
                } else {  
                    Equip equip = new Equip(rs.getInt("itemid"), (byte) rs.getInt("position"), -1);  
                    equip.setOwner(rs.getString("owner"));  
                    equip.setQuantity((short) 1);  
                    equip.setAcc((short) rs.getInt("acc"));  
                    equip.setAvoid((short) rs.getInt("avoid"));  
                    equip.setDex((short) rs.getInt("dex"));  
                    equip.setHands((short) rs.getInt("hands"));  
                    equip.setHp((short) rs.getInt("hp"));  
                    equip.setInt((short) rs.getInt("int"));  
                    equip.setJump((short) rs.getInt("jump"));  
                    equip.setVicious((short) rs.getInt("vicious"));  
                    equip.setFlag((short) rs.getInt("flag"));  
                    equip.setLuk((short) rs.getInt("luk"));  
                    equip.setMatk((short) rs.getInt("matk"));  
                    equip.setMdef((short) rs.getInt("mdef"));  
                    equip.setMp((short) rs.getInt("mp"));  
                    equip.setSpeed((short) rs.getInt("speed"));  
                    equip.setStr((short) rs.getInt("str"));  
                    equip.setWatk((short) rs.getInt("watk"));  
                    equip.setWdef((short) rs.getInt("wdef"));  
                    equip.setUpgradeSlots((byte) rs.getInt("upgradeslots"));  
                    equip.setLevel((byte) rs.getInt("level"));  
                    equip.setItemLevel(rs.getByte("itemlevel"));  
                    equip.setItemExp(rs.getInt("itemexp"));  
                    equip.setRingId(rs.getInt("ringid"));  
                    equip.setExpiration(rs.getLong("expiration"));  
                    equip.setGiftFrom(rs.getString("giftFrom"));  
  
                    items.add(new MTSItemInfo(equip, rs.getInt("price") + 100 + (int) (rs.getInt("price") * 0.1), rs.getInt("id"), rs.getInt("seller"), rs.getString("sellername"), rs.getString("sell_ends")));  
                }  
            }  
        }  
  
        try (PreparedStatement ps = con.prepareStatement("SELECT COUNT(*) FROM mts_items");  
             ResultSet rs = ps.executeQuery()) {  
            if (rs.next()) {  
                pages = (int) Math.ceil(rs.getInt(1) / 16);  
            }  
        }  
    } catch (SQLException e) {  
        e.printStackTrace();  
    }  
    c.sendPacket(PacketCreator.sendMTS(items, 1, 0, 0, pages));  
    c.sendPacket(PacketCreator.transferInventory(getTransfer(chr.getId())));  
    c.sendPacket(PacketCreator.notYetSoldInv(getNotYetSold(chr.getId())));  
}  
  
private List<MTSItemInfo> getNotYetSold(int cid) {  
    List<MTSItemInfo> items = new ArrayList<>();  
    try (Connection con = DatabaseConnection.getConnection();  
         PreparedStatement ps = con.prepareStatement("SELECT * FROM mts_items WHERE seller = ? AND transfer = 0 ORDER BY id DESC")) {  
        ps.setInt(1, cid);  
  
        try (ResultSet rs = ps.executeQuery()) {  
            while (rs.next()) {  
                if (rs.getInt("type") != 1) {  
                    Item i = new Item(rs.getInt("itemid"), (short) 0, (short) rs.getInt("quantity"));  
                    i.setOwner(rs.getString("owner"));  
                    items.add(new MTSItemInfo(i, rs.getInt("price"), rs.getInt("id"), rs.getInt("seller"), rs.getString("sellername"), rs.getString("sell_ends")));  
                } else {  
                    Equip equip = new Equip(rs.getInt("itemid"), (byte) rs.getInt("position"), -1);  
                    equip.setOwner(rs.getString("owner"));  
                    equip.setQuantity((short) 1);  
                    equip.setAcc((short) rs.getInt("acc"));  
                    equip.setAvoid((short) rs.getInt("avoid"));  
                    equip.setDex((short) rs.getInt("dex"));  
                    equip.setHands((short) rs.getInt("hands"));  
                    equip.setHp((short) rs.getInt("hp"));  
                    equip.setInt((short) rs.getInt("int"));  
                    equip.setJump((short) rs.getInt("jump"));  
                    equip.setVicious((short) rs.getInt("vicious"));  
                    equip.setLuk((short) rs.getInt("luk"));  
                    equip.setMatk((short) rs.getInt("matk"));  
                    equip.setMdef((short) rs.getInt("mdef"));  
                    equip.setMp((short) rs.getInt("mp"));  
                    equip.setSpeed((short) rs.getInt("speed"));  
                    equip.setStr((short) rs.getInt("str"));  
                    equip.setWatk((short) rs.getInt("watk"));  
                    equip.setWdef((short) rs.getInt("wdef"));  
                    equip.setUpgradeSlots((byte) rs.getInt("upgradeslots"));  
                    equip.setLevel((byte) rs.getInt("level"));  
                    equip.setItemLevel(rs.getByte("itemlevel"));  
                    equip.setItemExp(rs.getInt("itemexp"));  
                    equip.setRingId(rs.getInt("ringid"));  
                    equip.setFlag((short) rs.getInt("flag"));  
                    equip.setExpiration(rs.getLong("expiration"));  
                    equip.setGiftFrom(rs.getString("giftFrom"));  
                    items.add(new MTSItemInfo(equip, rs.getInt("price"), rs.getInt("id"), rs.getInt("seller"), rs.getString("sellername"), rs.getString("sell_ends")));  
                }  
            }  
        }  
    } catch (SQLException e) {  
        e.printStackTrace();  
    }  
    return items;  
}  
  
private List<MTSItemInfo> getTransfer(int cid) {  
    List<MTSItemInfo> items = new ArrayList<>();  
    try (Connection con = DatabaseConnection.getConnection();  
         PreparedStatement ps = con.prepareStatement("SELECT * FROM mts_items WHERE transfer = 1 AND seller = ? ORDER BY id DESC")) {  
        ps.setInt(1, cid);  
  
        try (ResultSet rs = ps.executeQuery()) {  
            while (rs.next()) {  
                if (rs.getInt("type") != 1) {  
                    Item i = new Item(rs.getInt("itemid"), (short) 0, (short) rs.getInt("quantity"));  
                    i.setOwner(rs.getString("owner"));  
                    items.add(new MTSItemInfo(i, rs.getInt("price"), rs.getInt("id"), rs.getInt("seller"), rs.getString("sellername"), rs.getString("sell_ends")));  
                } else {  
                    Equip equip = new Equip(rs.getInt("itemid"), (byte) rs.getInt("position"), -1);  
                    equip.setOwner(rs.getString("owner"));  
                    equip.setQuantity((short) 1);  
                    equip.setAcc((short) rs.getInt("acc"));  
                    equip.setAvoid((short) rs.getInt("avoid"));  
                    equip.setDex((short) rs.getInt("dex"));  
                    equip.setHands((short) rs.getInt("hands"));  
                    equip.setHp((short) rs.getInt("hp"));  
                    equip.setInt((short) rs.getInt("int"));  
                    equip.setJump((short) rs.getInt("jump"));  
                    equip.setVicious((short) rs.getInt("vicious"));  
                    equip.setLuk((short) rs.getInt("luk"));  
                    equip.setMatk((short) rs.getInt("matk"));  
                    equip.setMdef((short) rs.getInt("mdef"));  
                    equip.setMp((short) rs.getInt("mp"));  
                    equip.setSpeed((short) rs.getInt("speed"));  
                    equip.setStr((short) rs.getInt("str"));  
                    equip.setWatk((short) rs.getInt("watk"));  
                    equip.setWdef((short) rs.getInt("wdef"));  
                    equip.setUpgradeSlots((byte) rs.getInt("upgradeslots"));  
                    equip.setLevel((byte) rs.getInt("level"));  
                    equip.setItemLevel(rs.getByte("itemlevel"));  
                    equip.setItemExp(rs.getInt("itemexp"));  
                    equip.setRingId(rs.getInt("ringid"));  
                    equip.setFlag((short) rs.getInt("flag"));  
                    equip.setExpiration(rs.getLong("expiration"));  
                    equip.setGiftFrom(rs.getString("giftFrom"));  
                    items.add(new MTSItemInfo(equip, rs.getInt("price"), rs.getInt("id"), rs.getInt("seller"), rs.getString("sellername"), rs.getString("sell_ends")));  
                }  
            }  
        }  
    } catch (SQLException e) {  
        e.printStackTrace();  
    }  
    return items;  
}

其中 enterMTS里的代码是从 EnterMTSHandler 的 handler 内复制过来的，另外两个方法是从 EnterMTSHandler 中复制过来的。

所以可以直接在 EnterMTSHandler 中删了相关代码，编辑 gms-server/src/main/java/org/gms/net/server/channel/handlers/EnterMTSHandler.java

整个文件最终结果

/*  
    This file is part of the OdinMS Maple Story Server    Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>              Matthias Butz <matze@odinms.de>              Jan Christian Meyer <vimes@odinms.de>  
    This program is free software: you can redistribute it and/or modify    it under the terms of the GNU Affero General Public License as    published by the Free Software Foundation version 3 as published by    the Free Software Foundation. You may not use, modify or distribute    this program under any other version of the GNU Affero General Public    License.  
    This program is distributed in the hope that it will be useful,    but WITHOUT ANY WARRANTY; without even the implied warranty of    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the    GNU Affero General Public License for more details.  
    You should have received a copy of the GNU Affero General Public License    along with this program.  If not, see <http://www.gnu.org/licenses/>.*/  
package org.gms.net.server.channel.handlers;  
  
import org.gms.client.Client;  
import org.gms.config.GameConfig;  
import org.gms.constants.id.NpcId;  
import org.gms.net.AbstractPacketHandler;  
import org.gms.net.packet.InPacket;  
import org.gms.scripting.npc.NPCScriptManager;  
  
  
public final class EnterMTSHandler extends AbstractPacketHandler {  
  
    @Override  
    public void handlePacket(InPacket p, Client c) {  
        if (!GameConfig.getServerBoolean("use_mts")) {  
            openCenterScript(c);  
            return;  
        }  
  
        c.getPlayer().enterMTS(c);  
    }  
  
    /**  
     * 打开拍卖行脚本菜单中心  
     *  
     * @param c 客户端  
     */  
    private void openCenterScript(Client c) {  
        NPCScriptManager.getInstance().start(c, NpcId.BEI_DOU_NPC_BASE, null);  
    }  
}

这样我们的 Character 就有了 enterMTS 方法用于进入拍卖界面，只需要在脚本里调用即可。

编辑拍卖行脚本 gms-server/scripts-zh-CN/npc/9900001.js

在

text += "#L3#传送自由#l \t #L4#爆率一览#l\r\n";

下面插入

text += "#L5#拍卖#l\r\n";

在

case 4:  
    openNpc("当前地图掉落");  
    break;

下面插入

case 5:  
    cm.getPlayer().enterMTS(cm.getClient());  
    break;

到这里就完成了，点击拍卖按钮呼出拍卖行脚本，脚本里多了个拍卖菜单，用于进入原始拍卖界面

这个教程只是一个示例，教你怎么吃饱，至于怎么吃好，你自己琢磨吧。