关于用JSF框架的一个登录例子问题!

Question

本人刚学JSF框架,感觉JSF比Struts要简易一些,觉得JSF有些像ASP.NET的味道.

Answer 1

CheckUser里的us没有初始化,所以会null point.把verifyUser()写到UserBean里
public String verifyUser()
    {
        if (name.equals("Tomcat") && password.equals("Tomcat"))
            return "success";
        else
            return "failure";
    }
然后相应改一下faces-config.xml和login.jsp.

Answer 2

不赞成 stapro(stapro)的解决方案..verifyUser还是放在CheckUser.java中,改成.
package hellouser;public class CheckUser
{
    private   UserBean us = new UserBean();
    public setUs(UserBean us){
         this.us=us;
    }
    public String verifyUser()
    {
        String name = us.getName();
        String password = us.getPassword();
        
        if (name.equals("Tomcat") && password.equals("Tomcat"))
            return "success";
        else
            return "failure";
    }
}
然后更改faces-config.xml  <managed-bean>
    <managed-bean-name>User</managed-bean-name>
    <managed-bean-class>hellouser.UserBean</managed-bean-class>
    <managed-bean-scope>session</managed-bean-scope>
    <managed-property>
      <property-name>us</property-name>
       <value>#{sessionScope.User}</value>
    </managed-property>
  </managed-bean>

Answer 3

CheckBean错了..package hellouser;public class CheckUser
{
    private   UserBean us ;  ///////////////
    public setUs(UserBean us){
         this.us=us;
    }
    public String verifyUser()
    {
        String name = us.getName();
        String password = us.getPassword();
        
        if (name.equals("Tomcat") && password.equals("Tomcat"))
            return "success";
        else
            return "failure";
    }
}