title: PersistenceException when I was using Ebean in Play framework
body: <p>I am writing a web application in Java by using Play Framework 2.1.0. And I am using Ebean to manipulate the database. But I got one problem now:</p>
  
  <p>I have a model class called book with an int type column called page:</p>
  
  <pre><code>    public int page;
  
      @Column(name="page")
      public int getPage() {
          return page;
      }
  
     public void setPage(int page) {
          this.page = page;
     }
  </code></pre>
  
  <p>And the page column in my MySql database is also int type. When I get a result(row) using Ebean and the value of page column in my database has a specified value like 12, it works well. But if the value of page attribute is null in my database, the application will throw an exception:</p>
  
  <pre><code>Execution exception[[PersistenceException: Error loading on models.Book.page]]
  </code></pre>
  
  <p>I don't how to deal with this problem.</p>