Why does jsp launch PropertyNotFound?

Question

JSP entry:

${a.b.c} 

throws 'c' PropertyNotFound but writes

<s:property value="#a.b.c"/> 

works great.

I would be grateful if anyone could explain why it ${a.b.c}does not work?

UPDATED:

In the same JSP, referring to another bean f, for example ${a.f.d}, it finds dcorrectly.

I checked that property cin ${a.b.c}exists.

Answer 1

Good question. If you did not specify getter seters for property c in b, then this error will occur Propertynotfoundfor

 ${a.b.c}

But

  <s:property value="#a.b.c"/> 

. , ${} , OGNL, - valuestack.

getter setter b. ${a.b.c} . , c String c,

public String getC() {
    return c;
}
public void setC(String c) {
    this.c = c;
}