Jquery ajax post user-defined object to Strut2 action

Question

i'm trying to post user-defined object to struts2's action, but my object in action is still null. Can anyone help me? Thanks for help.

User.java

public class User {
    private String username;
    private String password;

    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
}

This is my action Login.java

public class Login extends ActionSupport {
    private User user;

    @Override
    public String execute() throws Exception {
        System.out.println(user.getUsername() + " - " + user.getPassword());
        return "success";
    }

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }
}

my ajax call in jsp page:

    $(function() {
        var user = {'user.username': 'abc', 'user.password' : '123'};
        //var user = {username: 'abc', password : '123'};
        $.ajax({
            type : 'POST',
            url : 'login',
            data : JSON.stringify(user),
            //data: user,
            contentType : 'application/json',
            success : function(result) {
                alert("hh");
            }
        });
    });

struts.xml

<struts>
    <constant name="struts.devMode" value="true" />
    <package name="struts2jquery" extends="struts-default, json-default">
        <action name="login" class="com.myapp.action.Login">
            <result name="success">result.jsp</result>
        </action>
    </package>
</struts>

+1, nicely spelled and formatted answer, with all the relevant parts and no noise around, you're starting good... BTW, I found strange that you are performing an AJAX call (that should stay in the same page after doing its business) and then returning a JSP file as a result. You probably want to return a JSON result, parse it into page then perform a redirect, or something similar... the returned result of an AJAX call can't change the whole page, that is the business of a standard call... — Andrea Ligios
– Andrea Ligios, Commented Sep 11, 2013 at 8:25
Thanks for your advice. I'll return a JSON result, but I don't have my post data in struts action, so I just return a jsp page for test^^. — drakid
– drakid, Commented Sep 11, 2013 at 8:52
What ? Return a json for test... :) And put a Log line in each setter (of the user object in the Action, and inside the user Object), to see what is happening. — Andrea Ligios
– Andrea Ligios, Commented Sep 11, 2013 at 8:59
Yes, I want to know why struts cannot map my post data to object in action, while everything work fine if I use struts tag. I am trying to debug into struts framework but it seem vary complicated @@ — drakid
– drakid, Commented Sep 11, 2013 at 9:13
To debug in Eclipse, run Debug Configuration -> Remote Java Application, set the Host and the DEBUG PORT (your Application Server must run with debug mode enabled) and press DEBUG. Then set your breakpoints and use the WebApp — Andrea Ligios
– Andrea Ligios, Commented Sep 11, 2013 at 9:17

drakid · Accepted Answer · 2013-09-11 12:44:17Z

2

Finally, I resolved it :D. Just remove line contentType: "application/json" in the ajax call. The ajax call now is:

        var u = {'user.username': 'abc', 'user.password' : '123'};
        $.ajax({
            type : 'POST',
            url : 'login',
            data: u,
            //contentType: "application/json",
            success : function(result) {
                //alert("hh");
            }
        });

Thanks everyone :D

answered Sep 11, 2013 at 12:44

drakid

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