2
考慮以下三類,C是B的子類。B是A的字段。 如何傳遞包含類C的實例的類A的實例它的領域,從JSP頁面到Spring Controller方法?如何使用Spring MVC DataBinding實例化子類
class A{
private B b;
public B getB(){return b;}
public void setB(B b){ this.b = b;}
}
class B{
private int id;
public int getId(){return id;}
public void setId(int id){this.id = id;}
}
class C extends B{
private name;
public String getName(){return name;}
public void setName(String name){this.name = name;}
}
樣品春季控制器:
@Controller
public class Handler{
@RequestMapping("/work")
public String work(@RequestParam("objA") A objA){
if(C.getClass().isInstance(objA.getB())){
System.out.println("It works.");
}
}
}
假想的JSP頁面,但不工作:
<form method="post" action="work" commandName="objA" >
<input type="submit" value="submit" /><br/>
<input type="hidden" name="b.name" value="name" /><br/>
<input type="hidden" name="b.id" value="1" /><br/>
</form>