很容易将建造者模式和工厂方法模式混淆，他们的区别是工厂方法模式侧重生产出相同的对象实例，而建造者模式强调的是对同一个对象实例的生产，不同的生产工艺（方法的执行顺序和对属性的赋值）将产生不同效果的对象

类图

java实现

产品类

public class Product {

    public void setPart1(){

    }

    public void setPart2(){

    }
}

建造者抽象类

public abstract class AbsBuilder {

    public abstract Product getProduct();

    public abstract void setProductPart();

}

建造者实现类

public class Product1Builder extends AbsBuilder {
    

    private Product mProduct = new Product();

    @Override
    public Product getProduct() {
        return this.mProduct;
    }

    @Override
    public void setProductPart() {

        this.mProduct.setPart1();

        this.mProduct.setPart2();

    }
}

public class Product3Builder extends AbsBuilder {
    

    private Product mProduct = new Product();

    @Override
    public Product getProduct() {
        return this.mProduct;
    }

    @Override
    public void setProductPart() {
        this.mProduct.setPart2();
    }
}

场景类

public class Client {

    public Product getProduct1(){
        AbsBuilder builder = new Product1Builder();
        builder.setProductPart();
        return builder.getProduct();
    }

    public Product getProduct3(){
        AbsBuilder builder = new Product3Builder();
        builder.setProductPart();
        return builder.getProduct();
    }
}

php实现

class Product
{
    
    public function setPart1()
    {
    
        echo 'setPart1';
    }

    public function setPart2()
    {
    
        echo 'setPart2';
    }
}


abstract class AbsBuilder
{
    
    public abstract function getProduct();

    public abstract function setProductPart();
}


class Product1Builder extends AbsBuilder
{
    

    public $product;

    public function __construct()
    {
    
        $this->product = new Product;
    }
    public function getProduct()
    {
    
        return $this->product;
    }

    public function setProductPart()
    {
    
        $this->product->setPart1();
        $this->product->setPart2();

    }

}


class Product2Builder extends AbsBuilder
{
    

    public $product;

    public function __construct()
    {
    
        $this->product = new Product;
    }

    public function getProduct()
    {
    
        return $this->product;
    }

    public function setProductPart()
    {
    
        $this->product->setPart1();

    }

}


class Client
{
    
    public function getProduct1()
    {
    
        $builder = new Product1Builder;
        $builder->setProductPart();
        return $builder->getProduct();
    }
    public function getProduct3()
    {
    
        $builder = new Product2Builder;
        $builder->setProductPart();
        return $builder->getProduct();
    }

}

$client = new Client;
$client->getProduct1();
$client->getProduct3();