1. 定义一个抽象类作为产品的基类，定义产品类的基本属性和方法。

2. 定义一个抽象建造者类，用于定义产品的构建方法，并提供返回该产品的方法。

3. 在具体建造者类中实现抽象建造者类中的构建方法，用于构建不同的产品。

4. 定义一个指挥者类，用于控制建造者类的构建过程，在这里可以定义具体构建顺序或者跳过某些构建步骤。

5. 客户端只需要创建指挥者对象，传入建造者对象，调用指挥者类的构建方法即可构建所需的产品。

代码示例：

//抽象产品类 abstract class Product { protected String property1; protected String property2;

public abstract void setProperty1(String property1);
public abstract void setProperty2(String property2);
public abstract void showInfo();

}

//抽象建造者类 abstract class Builder { protected Product product = new ConcreteProduct();

public abstract void buildProperty1();
public abstract void buildProperty2();

public Product getProduct() {
    return product;
}

}

//具体产品类 class ConcreteProduct extends Product {

@Override
public void setProperty1(String property1) {
    this.property1 = property1;
}

@Override
public void setProperty2(String property2) {
    this.property2 = property2;
}

@Override
public void showInfo() {
    System.out.println("property1: " + property1);
    System.out.println("property2: " + property2);
}

}

//具体建造者类 class ConcreteBuilder extends Builder {

@Override
public void buildProperty1() {
    this.product.setProperty1("concrete property1");
}

@Override
public void buildProperty2() {
    this.product.setProperty2("concrete property2");
}

}

//指挥者类 class Director { private Builder builder;

public Director(Builder builder) {
    this.builder = builder;
}

public void construct() {
    this.builder.buildProperty1();
    this.builder.buildProperty2();
}

}

//客户端 public class Client { public static void main(String[] args) { Builder builder = new ConcreteBuilder(); Director director = new Director(builder); director.construct(); Product product = builder.getProduct(); product.showInfo(); } }