Bukkit插件编程之检测玩家受到的伤害是来自投射类武器还是近身武器

package com.sklm.lhb.listener;

import org.bukkit.entity.Arrow;
import org.bukkit.entity.Player;
import org.bukkit.entity.Projectile;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityDamageByEntityEvent;


import com.sklm.lhb.combat.Combat;
public class DamageListener implements Listener {
    public DamageListener(Combat plugin) {
        plugin.getServer().getPluginManager().registerEvents(this, plugin);
    }
    
    @EventHandler
    public void damage(EntityDamageByEntityEvent event) {
        if((event.getDamager() instanceof Player)&&(event.getEntity() instanceof Player)) {
                boolean fb_pvp = DamageUtil.getIsPVP("FB");
                Player player = (Player) event.getDamager();
                if((player.getWorld().getName()).equals("FB")){
                    if((event.getDamager() instanceof Player)&&(event.getEntity() instanceof Player)) {
                        Player player_self = (Player) event.getDamager();
                        boolean b = DamageUtil.isCommonGroup((Player)event.getEntity(), player_self);
                        String pvp_world = DamageUtil.getWorld_name();
                        if(b) {
                            event.setCancelled(true);
                            return ;
                        }else {
                            event.setCancelled(false);
                        }
                    }
                }
                if((player.getWorld().getName()).equals("ZC")) {
                    if((event.getDamager() instanceof Player)&&(event.getEntity() instanceof Player)) {
                        if(event.getDamager() instanceof Arrow) {
                            event.setCancelled(true);
                        }
                        event.setCancelled(true);
                        return ;
                    }else {
                        event.setCancelled(false);
                    }
                }        
        }else {
            //检测受到的伤害是否为投射物（弓箭，枪之类的伤害）
            if(event.getDamager() instanceof Projectile) {
                if((event.getDamager() instanceof Projectile)&&(event.getEntity() instanceof Player)) {
                        boolean fb_pvp = DamageUtil.getIsPVP("FB");
                        Player player = (Player) ((Projectile) event.getDamager()).getShooter();
                        if((player.getWorld().getName()).equals("FB")){
                            if((event.getDamager() instanceof Projectile)&&(event.getEntity() instanceof Player)) {
                                Player player_self = (Player) ((Projectile) event.getDamager()).getShooter();
                                boolean b = DamageUtil.isCommonGroup((Player)event.getEntity(), player_self);
                                String pvp_world = DamageUtil.getWorld_name();
                                if(b) {
                                    event.setCancelled(true);
                                    return ;
                                }else {
                                    event.setCancelled(false);
                                }
                            }
                        }
                        if((player.getWorld().getName()).equals("ZC")) {
                            if((event.getDamager() instanceof Projectile)&&(event.getEntity() instanceof Player)) {
                                event.setCancelled(true);
                                return ;
                            }else {
                                event.setCancelled(false);
                            }
                        }        
                }
            }
        }
        
    }
    
}

注意在检测玩家受到的伤害时候，近身类武器可以直接通过event.getDamager() instanceof Player 来判断是否受到伤害，但是在检测是否受到投掷类伤害的时候要通过event.getDamager instanceof Projectile来判断是否受到来自投掷类武器的伤害