A little bit of knowledge in struts

get the data on the form :

when the attribute is injected the property name must be the same as the name in the form

User name : <input type= "text" name= "username" >

in the action :

Private String username;

when injecting an object :

in the form's place name must use the object name point object's Properties

User name : <input type= "text" name= "user.username" >

in the in User :

Private String username;

in the action :

Private user user;

if (User.getusername (). Equals ("AAA")) {

Return success;

}

IOC ( control inversion ) Dependency Injection

action Scoped Object

1. non- IOC injection

get the request way one :

1.Httpservletrquest req = Servletactioncontext.getrequest ();

Request.setattribute ("name", username);

HttpSession session = Req.getsession ();

Session.getservletcontext ();

2. injected method , return to map form of request Implementation Interface Requstaware

Private map<string,object> request;

In the execute method :

Request.put ("ShowName", " injected request");

The Session is also stored in map form : Implementing interface Sessionaware

Private map<string,object> session;

In the execute method :

Session.put ("ShowSession", " injected session");

3.actioncontext.getcontext (). getsession ();/actioncontext.getaplication ();/actioncontext.put ("", "");

A little bit of knowledge in struts