I have custom page, and when i try to save it my page does not save any information. I used different type of codes for saving. Most of them does not work and some of them break my page. Is there anything wrong with my code that i could not find? ( My main problem is it should save information and return to the same page with values) Any idea? Thanks
 

public class test1 {

    public Product_Brief__c pb {get;set;}
    public User u {get;set;}

    private ApexPages.StandardController controller {get;set;}
    public boolean bUpdate {get;set;}
    public string loggedinUserId = UserInfo.getUserId();
    public User u2 = [Select ContactId From User where Id =: '005R0000001Y6h4'];

    public String ctId{
        get {
                ctId = u2.ContactId;
                return ctId;
            }
        set;
    }

    Contact ct = [SELECT AccountId FROM Contact WHERE id=:ctId];
    public string getacct(){
        Account acct = [SELECT Name FROM Account WHERE id=:ct.AccountId];  
        return acct.Name;
        return null;
        }

    Opportunity opp = [SELECT Id FROM Opportunity WHERE AccountId=:ct.AccountId LIMIT 1];

   /* public PageReference save() {
        controller.save();{
        pageReference pg = new pageReference('/apex/pitu3');
        pg.setRedirect(true);
        pg .getParameters().put('id',controller.getId());
        return pg;
        }
        return null;
    } */

    /* public PageReference save() {
       controller.save(); 
       return null;
    }  */


   /* public PageReference save() {
    if(controller.save() != null) { 
    PageReference ref = Page.sumpage3; 
    ref.setRedirect(true); 
    return ref; 
    }
     return null;
    } */


    public PageReference save() {
        if(controller.save() != null) {
        PageReference congratsPage = Page.pitu3;
        congratsPage.setRedirect(true);
        congratsPage.getParameters().put('id',controller.getId());
        return congratsPage;
        }return null;
    }

    public test1(ApexPages.StandardController controller) {
        this.controller = controller;
    }

    public PageReference page1(){
    return Page.pitu1;
    }

    public PageReference page2(){
    return Page.pitu2;
    }

    public PageReference page3(){
    return Page.pitu3;
    }

    public PageReference page4(){  
    return Page.pitu4;
    }

    public PageReference page5(){
    return Page.pitu5;
    }

}