1.将复杂的对象的构建与其表示分离，使同样的构建过程可以有不同的表示
代码如下
//父类抽象，采用模板方法模式，定义一系列算法，抽象，定义一模板，由sequence 动态决定算法是否执行
//子类将继承该类并实现3个算法
abstract class design_mode_Builder_Pattern_Model
{
private ArrayList<String> sequence = new ArrayList<String>();
protected abstract void design_mode_Builder_Pattern_Model_MethodA();
protected abstract void design_mode_Builder_Pattern_Model_MethodB();
protected abstract void design_mode_Builder_Pattern_Model_MethodC();
final public void setSequence(ArrayList<String> sequence)
{
this.sequence = sequence;
}
//定义的模板方法
final public void design_mode_Builder_Pattern_Model_Method_transfer ()
{
for(int i=0;i<this.sequence.size();i++)
{
String actionName = this.sequence.get(i);
if (actionName == "MethodA" )
{
this.design_mode_Builder_Pattern_Model_MethodA();
}
else if (actionName == "MethodB" )
{
this.design_mode_Builder_Pattern_Model_MethodB();
}
else if (actionName == "MethodC" )
{
this.design_mode_Builder_Pattern_Model_MethodC();
}
else
{
System.out.println("wrong method");
}
}
}
}
// 子类1
class design_mode_Builder_Pattern_Model_class_1 extends design_mode_Builder_Pattern_Model
{
protected void design_mode_Builder_Pattern_Model_MethodA()
{
System.out.println("design_mode_Builder_Pattern_Model_class_1 design_mode_Builder_Pattern_Model_MethodA");
}
protected void design_mode_Builder_Pattern_Model_MethodB()
{
System.out.println("design_mode_Builder_Pattern_Model_class_1 design_mode_Builder_Pattern_Model_MethodB");
}
protected void design_mode_Builder_Pattern_Model_MethodC()
{
System.out.println("design_mode_Builder_Pattern_Model_class_1 design_mode_Builder_Pattern_Model_MethodC");
}
}
// 子类2
class design_mode_Builder_Pattern_Model_class_2 extends design_mode_Builder_Pattern_Model
{
protected void design_mode_Builder_Pattern_Model_MethodA()
{
System.out.println("design_mode_Builder_Pattern_Model_class_2 design_mode_Builder_Pattern_Model_MethodA");
}
protected void design_mode_Builder_Pattern_Model_MethodB()
{
System.out.println("design_mode_Builder_Pattern_Model_class_2 design_mode_Builder_Pattern_Model_MethodB");
}
protected void design_mode_Builder_Pattern_Model_MethodC()
{
System.out.println("design_mode_Builder_Pattern_Model_class_2 design_mode_Builder_Pattern_Model_MethodC");
}
}
// 建立抽象建造者类，定义抽象方法执行顺序并返回子类
abstract class design_mode_Builder_Pattern_Model_Builder
{
public abstract void setSequence(ArrayList<String> sequence);
public abstract design_mode_Builder_Pattern_Model getdesign_mode_Builder_Pattern_Model();
}
// 建造者1
class design_mode_Builder_Pattern_Model_class_1_Builder extends design_mode_Builder_Pattern_Model_Builder
{
private design_mode_Builder_Pattern_Model_class_1 getdesign_mode_Builder_Pattern_Model_1 = new design_mode_Builder_Pattern_Model_class_1();
//getdesign_mode_Builder_Pattern_Model_1 =
public design_mode_Builder_Pattern_Model getdesign_mode_Builder_Pattern_Model()
{
return this.getdesign_mode_Builder_Pattern_Model_1;
}
public void setSequence(ArrayList<String> sequence)
{
this.getdesign_mode_Builder_Pattern_Model_1.setSequence(sequence);
}
}
// 建造者2
class design_mode_Builder_Pattern_Model_class_2_Builder extends design_mode_Builder_Pattern_Model_Builder
{
private design_mode_Builder_Pattern_Model_class_2 getdesign_mode_Builder_Pattern_Model_2 = new design_mode_Builder_Pattern_Model_class_2();
public design_mode_Builder_Pattern_Model getdesign_mode_Builder_Pattern_Model()
{
return this.getdesign_mode_Builder_Pattern_Model_2;
}
public void setSequence(ArrayList<String> sequence)
{
this.getdesign_mode_Builder_Pattern_Model_2.setSequence(sequence);
}
}
// 导演类，定义各模型的内部实现等
class design_mode_Builder_Pattern_Model_director
{
private ArrayList<String> sequence = new ArrayList();
private design_mode_Builder_Pattern_Model_class_1_Builder model1 = new design_mode_Builder_Pattern_Model_class_1_Builder();
private design_mode_Builder_Pattern_Model_class_2_Builder model2 = new design_mode_Builder_Pattern_Model_class_2_Builder();
// 构造模型1
public design_mode_Builder_Pattern_Model_class_1 getModel1()
{
this.sequence.clear();
this.sequence.add("MethodA");
this.sequence.add("MethodB");
this.sequence.add("MethodC");
this.model1.setSequence(sequence);
return (design_mode_Builder_Pattern_Model_class_1)model1.getdesign_mode_Builder_Pattern_Model();
}
// 构造模型2
public design_mode_Builder_Pattern_Model_class_1 getModel1_1()
{
this.sequence.clear();
this.sequence.add("MethodA");
this.sequence.add("MethodC");
this.model1.setSequence(sequence);
return (design_mode_Builder_Pattern_Model_class_1)model1.getdesign_mode_Builder_Pattern_Model();
}
// 构造模型3
public design_mode_Builder_Pattern_Model_class_2 getModel2_1()
{
this.sequence.clear();
this.sequence.add("MethodA");
this.sequence.add("MethodC");
this.sequence.add("MethodA");
this.model2.setSequence(sequence);
return (design_mode_Builder_Pattern_Model_class_2)model2.getdesign_mode_Builder_Pattern_Model();
}
// 构造模型4
public design_mode_Builder_Pattern_Model_class_2 getModel2_2()
{
this.sequence.clear();
this.sequence.add("MethodA");
this.sequence.add("MethodC");
this.model2.setSequence(sequence);
return (design_mode_Builder_Pattern_Model_class_2)model2.getdesign_mode_Builder_Pattern_Model();
}
}
// 测试类
class design_mode_Builder_Pattern_Model_Client
{
public void design_mode_Builder_Pattern_Model_Client_Test()
{
design_mode_Builder_Pattern_Model_director director = new design_mode_Builder_Pattern_Model_director();
// 第1个构造
for (int i=0;i<5 ;i++ )
{
director.getModel1().design_mode_Builder_Pattern_Model_Method_transfer();
}
// 第2个构造
for (int i=0;i<5 ;i++ )
{
director.getModel1_1().design_mode_Builder_Pattern_Model_Method_transfer();
}
// 第3个构造
for (int i=0;i<5 ;i++ )
{
director.getModel2_1().design_mode_Builder_Pattern_Model_Method_transfer();
}
// 第4个构造
for (int i=0;i<5 ;i++ )
{
director.getModel2_2().design_mode_Builder_Pattern_Model_Method_transfer();
}
}
}