🔍目的
🔍解释
真实世界例子
通俗描述
维基百科
程序示例
创建一个武器类层级
public interface Weapon {
void wield();
void swing();
void unwield();
Enchantment getEnchantment();
}
public class Sword implements Weapon {
private final Enchantment enchantment;
public Sword(Enchantment enchantment) {
this.enchantment = enchantment;
}
@Override
public void wield() {
LOGGER.info("The sword is wielded.");
enchantment.onActivate();
}
@Override
public void swing() {
LOGGER.info("The sword is swinged.");
enchantment.apply();
}
@Override
public void unwield() {
LOGGER.info("The sword is unwielded.");
enchantment.onDeactivate();
}
@Override
public Enchantment getEnchantment() {
return enchantment;
}
}
public class Hammer implements Weapon {
private final Enchantment enchantment;
public Hammer(Enchantment enchantment) {
this.enchantment = enchantment;
}
@Override
public void wield() {
LOGGER.info("The hammer is wielded.");
enchantment.onActivate();
}
@Override
public void swing() {
LOGGER.info("The hammer is swinged.");
enchantment.apply();
}
@Override
public void unwield() {
LOGGER.info("The hammer is unwielded.");
enchantment.onDeactivate();
}
@Override
public Enchantment getEnchantment() {
return enchantment;
}
}
创建单独的附魔类
public interface Enchantment {
void onActivate();
void apply();
void onDeactivate();
}
public class FlyingEnchantment implements Enchantment {
@Override
public void onActivate() {
LOGGER.info("The item begins to glow faintly.");
}
@Override
public void apply() {
LOGGER.info("The item flies and strikes the enemies finally returning to owner's hand.");
}
@Override
public void onDeactivate() {
LOGGER.info("The item's glow fades.");
}
}
public class SoulEatingEnchantment implements Enchantment {
@Override
public void onActivate() {
LOGGER.info("The item spreads bloodlust.");
}
@Override
public void apply() {
LOGGER.info("The item eats the soul of enemies.");
}
@Override
public void onDeactivate() {
LOGGER.info("Bloodlust slowly disappears.");
}
}
原神启动!
var enchantedSword = new Sword(new SoulEatingEnchantment());
enchantedSword.wield();
enchantedSword.swing();
enchantedSword.unwield();
// The sword is wielded.
// The item spreads bloodlust.
// The sword is swinged.
// The item eats the soul of enemies.
// The sword is unwielded.
// Bloodlust slowly disappears.
var hammer = new Hammer(new FlyingEnchantment());
hammer.wield();
hammer.swing();
hammer.unwield();
// The hammer is wielded.
// The item begins to glow faintly.
// The hammer is swinged.
// The item flies and strikes the enemies finally returning to owner's hand.
// The hammer is unwielded.
// The item's glow fades.
🔍类图
Bridge class diagram
🔍适用场景
使用桥接模式当