Bukkit 排行榜插件：使用 Vault API 实现经济排名

以下是一个使用 Java 编写的基于 Vault 的排行榜插件示例。该插件将使用 Vault API 来获取玩家的经济数据，并根据其经济数值进行排名。\n\njava\nimport org.bukkit.Bukkit;\nimport org.bukkit.ChatColor;\nimport org.bukkit.command.Command;\nimport org.bukkit.command.CommandExecutor;\nimport org.bukkit.command.CommandSender;\nimport org.bukkit.entity.Player;\nimport org.bukkit.plugin.RegisteredServiceProvider;\nimport org.bukkit.plugin.java.JavaPlugin;\n\nimport net.milkbowl.vault.economy.Economy;\n\npublic class LeaderboardPlugin extends JavaPlugin implements CommandExecutor {\n private Economy economy;\n\n @Override\n public void onEnable() {\n if (!setupEconomy()) {\n getLogger().severe("Vault not found! This plugin requires Vault to be installed.");\n getServer().getPluginManager().disablePlugin(this);\n return;\n }\n\n getCommand("leaderboard").setExecutor(this);\n }\n\n private boolean setupEconomy() {\n RegisteredServiceProvider<Economy> rsp = getServer().getServicesManager().getRegistration(Economy.class);\n if (rsp == null) {\n return false;\n }\n economy = rsp.getProvider();\n return economy != null;\n }\n\n @Override\n public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {\n if (command.getName().equalsIgnoreCase("leaderboard")) {\n if (!(sender instanceof Player)) {\n sender.sendMessage(ChatColor.RED + "Only players can use this command!");\n return true;\n }\n\n Player player = (Player) sender;\n String[] leaderboard = getLeaderboard();\n\n player.sendMessage(ChatColor.GREEN + "----- Leaderboard -----");\n for (int i = 0; i < leaderboard.length; i++) {\n player.sendMessage(ChatColor.YELLOW + String.format("%d. %s", i + 1, leaderboard[i]));\n }\n player.sendMessage(ChatColor.GREEN + "-----------------------");\n return true;\n }\n return false;\n }\n\n private String[] getLeaderboard() {\n Player[] players = Bukkit.getOnlinePlayers().toArray(new Player[0]);\n String[] leaderboard = new String[players.length];\n\n for (int i = 0; i < players.length; i++) {\n String playerName = players[i].getName();\n double playerBalance = economy.getBalance(players[i]);\n\n leaderboard[i] = playerName + " - " + playerBalance;\n }\n\n // Sort leaderboard based on player balance\n for (int i = 0; i < leaderboard.length; i++) {\n for (int j = i + 1; j < leaderboard.length; j++) {\n double balanceI = Double.parseDouble(leaderboard[i].split(" - ")[1]);\n double balanceJ = Double.parseDouble(leaderboard[j].split(" - ")[1]);\n\n if (balanceI < balanceJ) {\n String temp = leaderboard[i];\n leaderboard[i] = leaderboard[j];\n leaderboard[j] = temp;\n }\n }\n }\n\n return leaderboard;\n }\n}\n\n\n要使用这个插件，你需要安装并启用 Vault 插件，并将 Vault 的依赖库添加到项目的构建路径中。然后，将上述代码保存为名为“LeaderboardPlugin.java”的文件，并将其放置在你的插件项目的正确位置。编译和打包插件后，将其放置在 Bukkit 服务器的插件文件夹中，然后重新启动服务器。\n\n在游戏中，玩家可以使用“/leaderboard”命令来查看经济排行榜。排行榜将根据玩家的经济数值进行排序，并显示每个玩家的排名和经济数值。