s2h-HTTP Status 404 - No result defined for action and result input错误解决

package sshlab10.s2h.action;

import java.util.List;

import sshlab10.s2h.dao.HibernateDao;
import sshlab10.s2h.dao.impl.HibernateDaoImpl;
import sshlab10.s2h.entity.Register;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class RegisterAction extends ActionSupport implements ModelDriven{
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private String password2;
    private Register register;
    private List<Register> users;
    private HibernateDao hibernateDao;
    
    
    public RegisterAction() {
        register=new Register();
        hibernateDao=new HibernateDaoImpl();
    }
    
    public String getPassword2() {
        return password2;
    }

    public void setPassword2(String password2) {
        this.password2 = password2;
    }


    public List<Register> getUsers() {
        return users;
    }

    public void setUsers(List<Register> users) {
        this.users = users;
    }
    
    public String getAllRegister() {
        users=hibernateDao.getAllRegister();
        return "show";
    }
    
    public String addRegister() {
        hibernateDao.addRegister(register);
        return SUCCESS;
    }

    @Override
    public Object getModel() {
        // TODO Auto-generated method stub
        return register;
    }
    
}