Java Framework STRUTS2 Data encapsulation

One, Strust2 package data contains two parts:

When the data is in the action class, it passes through the interceptor, which has many functions: such as data encapsulation, type conversion, and so on.

I can view the next Strust-default.xml file to see which interceptors are executed by default.

The interceptor in the default stack in is executed as follows:

Where the Interceptor params and Modeldriven are: Attribute encapsulation and module encapsulation respectively.

1. Attribute Encapsulation

Common: It is important to realize the set method. The interceptor uses the set method to encapsulate the data for us.

1 Package Jd.com.dealdata;2 3  Public classAbdata {4     PrivateString username;5     PrivateString password;6      PublicString datadeal () {7System. out. println ( This. password+ This. username);8         return NULL;9     }Ten  One      Public voidSetusername (String username) { A          This. Username =username; -     } -  the      Public voidSetPassword (String password) { -          This. Password =password; -     } -}

2, module packaging (more commonly used)

1) Preparatory work:

Need to write JavaBean.

Inherited interface: Modeldriven is a generic type that is later encapsulated JavaBean class name.

Implementation method:Getmodel Returns the class of JavaBean.

1 Package JD.com;2 3 import Com.opensymphony.xwork2.ActionSupport;4 import Com.opensymphony.xwork2.ModelDriven;5 6  Public classModal extends Actionsupport implements Modeldriven<user> {7     PrivateUser User =NewUser ();8 @Override9      PublicUser Getmodel () {Ten         returnuser; One     } A  - @Override -      PublicString Execute () throws Exception { theSystem. out. println (user); -         returnNONE; -     } -}

Java Framework STRUTS2 Data encapsulation