2016-03-21 53 views

回答

0
String requete = "Select * from employees where 1=1 "; 
if (!nom.isEmpty()) { 
    requete += " and last_name like '"+nom+"%'"; 
} 
if (!dd.isEmpty() && !ddd.isEmpty()) { 
    requete += " and hire_date between '"+dd+"' and '"+ddd+"'; 
} 

這樣你可以優化,所以你可以擺脫相同的條件,如果在else塊。