概述
桥接模式就是把事物和其具体实现分开，使他们可以各自独立的变化
适用性
将抽象化与实现化解耦，使得二者可以独立变化，像我们常用的 JDBC 桥 DriverManager 一样，JDBC 进行连接数据库的时候，在各个数据库之间进行切换，基本不需要动太多的代码，甚至丝毫不用动，原因就是 JDBC 提供统一接口，每个数据库提供各自的实现，用一个叫做数据库驱动的程序来桥接就行了
案例
public abstract class Clothing {
public abstract void personDressCloth(Person person
);
}
public class Jacket extends Clothing {
public void personDressCloth(Person person
) {
System
.out
.println(person
.getType() + "穿马甲");
}
}
public class Trouser extends Clothing {
public void personDressCloth(Person person
) {
System
.out
.println(person
.getType() + "穿裤子");
}
}
public abstract class Person {
private Clothing clothing
;
private String type
;
public Clothing
getClothing() {
return clothing
;
}
public void setClothing() {
this.clothing
= ClothingFactory
.getClothing();
}
public void setType(String type
) {
this.type
= type
;
}
public String
getType() {
return this.type
;
}
public abstract void dress();
}
public class Man extends Person {
public Man() {
setType("男人");
}
public void dress() {
Clothing clothing
= getClothing();
clothing
.personDressCloth(this);
}
}
public class Lady extends Person {
public Lady() {
setType("女人");
}
public void dress() {
Clothing clothing
= getClothing();
clothing
.personDressCloth(this);
}
}
public class Test {
public static void main(String
[] args
) {
Person man
= new Man();
Person lady
= new Lady();
Clothing jacket
= new Jacket();
Clothing trouser
= new Trouser();
jacket
.personDressCloth(man
);
trouser
.personDressCloth(man
);
jacket
.personDressCloth(lady
);
trouser
.personDressCloth(lady
);
}
}
