原廠模式和抽象原廠模式

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原廠模式: 定義一個用於建立對象的介面,讓他的子類決定執行個體化哪個類.使類的執行個體化延遲到子類.

1.普通的原廠模式:

public class GoodProduct implements Product {
private String prodInfo = "Iam the good prod";
public String getProductInfo() {
// TODO Auto-generated method stub
return this.prodInfo;
}

public void setProdInfo(String prodInfo) {
// TODO Auto-generated method stub
this.prodInfo = prodInfo;
}
}

public class BadProduct implements Product {

public String getProductInfo() {
// TODO Auto-generated method stub
return "Iam the bad product";
}
public void setProdInfo(String prodInfo) {
// TODO Auto-generated method stub

}
}

public class ProdCreator implements Creator {

public <t extends Product> t getProd(Class<t> c) {
// TODO Auto-generated method stub
t ret = null;
try {
ret = (t) Class.forName(c.getName()).newInstance();
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
return ret;
}
}
}

2。多個工廠的原廠模式:

public class BadProdCreator {
public Product getProd(){
return new BadProduct();
}
}

goodProdCreator 同理。

調用方法：

public static void main(String[] args) {
// TODO Auto-generated method stub
ProdCreator pc = new ProdCreator();
GoodProduct gp = pc.getProd(GoodProduct.class);
System.out.println(gp.getProductInfo());
BadProduct bp = pc.getProd(BadProduct.class);
System.out.println(bp.getProductInfo());
gp = SimpleCreator.getProd(GoodProduct.class);
bp = SimpleCreator.getProd(BadProduct.class);
System.out.println(gp.getProductInfo());
System.out.println(bp.getProductInfo());
BadProdCreator bpc = new BadProdCreator();
System.out.println(bpc.getProd().getProductInfo());
}

 

抽象原廠模式：為建立一組相關或者相互依賴的對象提供介面，無需指定具體的類。