Javaweb the solution to tell the user what the exception is

First, you define a class that displays validation information.

Such as:

1  Public InterfaceReturnobject {2 3      Public Booleanissuccess ();4 5      PublicString GetReason ();6 7 }8 9  Public classDefaultreturnImplementsReturnobject {Ten     Private Booleansuccess; One     PrivateString reason; A  -      PublicDefaultreturn (Booleansuccess, String reason) { -          This. Success =success; the          This. Reason =reason; -     } -  - @Override +      Public Booleanissuccess () { -         returnsuccess; +     } A  at @Override -      PublicString GetReason () { -         returnreason; -     } -}

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After that, the return type is the class (back to the foreground).

The code in the foreground validates the information

such as (Ajax's success function):

Success:function (dataobj) {                    if (true = = dataobj["Success"]) {                        location.href = "";                            } else {                                alert (dataobj["Reason"]);                            }                        }

Javaweb the solution to tell the user what the exception is