Java reflection: The dynamic call method according to the method name, solve the commodity dynamic property value problem.

public class goods{

Private String Goodsname;

Private String attr1;

Private String attr2;

Private String ATTR3;

Private String ATTR4;

.........

Private String Attr20;

Setter/getter method

}

In database table goods, the number of attributes of the product is known to be N (satisfies: N=5,ATTR1-ATTR5 has a value, Attr6-attr20 is empty). Ask how to remove the attribute values for each item:

Method One:

Remove the 20 attribute value

String attr1=goods.getattr1 ();

String attr2=goods.getattr2 ();

........

String Attr20=goods.getattr20 ();

Method Two:

Use reflection to take a value from a method name
Attr= Goods.getdeclaredmethod ("attr" +i);

The reflective knowledge involved, please consult other information, here only the dynamic product attribute value of the scheme.

Java reflection: The dynamic call method according to the method name, solve the commodity dynamic property value problem.