Struts2 to pass parameters between the action and the JSP __JS

1, the browser to the action pass parameters:

set the property in action and set the Get/set method for the property. Assign a value by the name of the property when passing the parameter. such as Xxx?name=aa

value with Request.getprameters ("property name");

public class Useraction {  
    private String name;  
    private user user;  
    Public String Useradd () {  
        System.out.print (User.getname ());  
        System.out.print (name);  
        Return "Success";  
    }  
    Public String GetName () {return  
        name;  
    }  
    public void SetName (String name) {  
        this.name = name;  
    }  
    Public User GetUser () {return  
        user;  
    }  
    public void SetUser (user user) {  
        this.user = user  
    }  
}  

Note: Struts2 does not use the single case mode, so each request is a new object.

2, Action to the browser interface pass parameters:

There are three kinds of ways:

1) Species: directly to the action attribute (there is a Get/set method) assignment, JSP in <s:property value= "OGNL expression"/> Value, note that the return result type is forward

For example: <s:property value= "name"/> <s:property value= "User.Name"/>

2: Pass the value by Actioncontext, add in the method called in the action:

Actioncontext.getcontext (). Put ("Key", "value");

<s:property value= "#key"/> value in JSP

3) Kinds: Through request, session pass value. The action method sets the value by obtaining the HttpServletRequest, HttpSession, and map objects.

For example:

Servletactioncontext.getrequest (). setattribute ("arg0", "value"); Servletactioncontext.getrequest (). GetSession (). setattribute ("arg0", "value"); Actioncontext.getcontext (). GetSession (). Put ("Key", "value");

JSP page through:

"Transferred from" http://cailangwei.blog.163.com/blog/static/131458579201287112552485/