Struts2 Domainmodel, Modeldriven receive parameters

First, Domainmodel (domain model)

1.

Application scenario: Generally we receive parameters in the action of STRUTS2 is usually the following way

 PackageCn.orlion.user;ImportCom.opensymphony.xwork2.ActionSupport; Public classUseractionextendsactionsupport{PrivateString username; PrivateString password;  PublicString GetUserName () {returnusername; }     Public voidSetusername (String username) { This. Username =username; }     PublicString GetPassword () {returnpassword; }     Public voidSetPassword (String password) { This. Password =password; }         PublicString Login () {System.out.println ("Username=" +username); System.out.println ("Password=" +password); returnSUCCESS; }}

This creates a problem when we want to get more attributes such as we want to add age, sex, birthday ... Wait, so we're going to write a huge Get\set method. Obviously undesirable, so you can use Domainmodel to receive parameters.

First create a package: Cn.orlion.model, and then create a user class, as follows:

 PackageCn.orlion.model; Public classUser {PrivateString username; PrivateString password; PrivateString age;  PublicString GetUserName () {returnusername; }     Public voidSetusername (String username) { This. Username =username; }     PublicString GetPassword () {returnpassword; }     Public voidSetPassword (String password) { This. Password =password; }     PublicString getage () {returnAge ; }     Public voidsetage (String age) { This. Age =Age ; }}

Change the top useraction to :

 PackageCn.orlion.user;ImportCom.opensymphony.xwork2.ActionSupport;ImportCn.orlion.model.User; Public classUseractionextendsactionsupport{Privateuser User;  PublicString Login () {System.out.println ("Username=" +user.getusername ()); System.out.println ("Password=" +User.getpassword ()); System.out.println ("Age=" +user.getage ()); returnSUCCESS; }         PublicUser GetUser () {returnuser; }         Public voidsetUser (user user) { This. user =user; }}

When accessing

Http://localhost:8080/Struts2Demo1/user/login.action?user.username=1&user.password=2&user.age= 3 o'clock will print out the username=1 on the console.

password=2

Age=3

2. DTO (data transferobject) data Transfer Object

The above code has been a good solution to the problem of too many properties, but there is still a problem: when we have a property can not be added to the user, (such as the registration page will usually have a confirmation password input box to receive Passwordconfim) What to do? This can be solved with a dto. Generates a domain object from a dto.

First create a package cn.orlion.dto, and then create a class userdto as follows:

 Packagecn.orlion.dto; Public classUserdto {PrivateString username; PrivateString password; PrivateString passwordconfirm; PrivateString age;  PublicString getage () {returnAge ; }     Public voidsetage (String age) { This. Age =Age ; }     PublicString GetUserName () {returnusername; }     Public voidSetusername (String username) { This. Username =username; }     PublicString GetPassword () {returnpassword; }     Public voidSetPassword (String password) { This. Password =password; }     PublicString getpasswordconfirm () {returnpasswordconfirm; }     Public voidsetpasswordconfirm (String passwordconfirm) { This. passwordconfirm =passwordconfirm; }}

Then useraction instead:

 PackageCn.orlion.user;ImportCom.opensymphony.xwork2.ActionSupport;ImportCn.orlion.dto.UserDTO;ImportCn.orlion.model.User; Public classUseractionextendsactionsupport{Privateuserdto userdto;  PublicString Login () {string Password=Userdto.getpassword (); String passwordconfirm=userdto.getpasswordconfirm (); SYSTEM.OUT.PRINTLN (Password+ "-" +passwordconfirm); if(!password.equals (passwordconfirm)) {System.out.println ("Two input passwords inconsistent"); returnERROR; } User User=NewUser ();        User.setusername (Userdto.getusername ());        User.setpassword (Userdto.getpassword ());        User.setage (Userdto.getage ()); //Add user Action ...                returnSUCCESS; }     Publicuserdto getuserdto () {returnuserdto; }     Public voidsetuserdto (userdto userdto) { This. Userdto =userdto; }}

Visit http://localhost:8080/struts2demo1/user/login.action?userdto.username=1&userdto.password=2& Userdto.passwordconfirm=2&userdto.age=3

That's all you can do.

Second, Modeldriven

This approach is to have the action class implement the Modeldriven interface:

 PackageCn.orlion.user;ImportCom.opensymphony.xwork2.ModelDriven;ImportCn.orlion.model.User; Public classUseractionImplementsModeldriven<user>{        Privateuser User;  PublicString Login () {System.out.println (User.getusername ());                System.out.println (User.getpassword ()); return"Success"; }         PublicUser GetUser () {returnuser; }         Public voidsetUser (user user) { This. user =user; } @Override
Because implementing an interface generic is specified as user, the return value type is not an object but a user.  PublicUser Getmodel () {returnuser; }}

This will print 1, 2 when accessing the http://localhost:8080/Struts2Demo/user/login.action?user.username=1&user.password=2 console.

Struts2 Domainmodel, Modeldriven receive parameters