Question

我在贾瓦的申请书中利用TongLink的永久图书馆与MySQL db。

I ve developed the class library which is used by several desktop applications, it contains some classes that are specific for my project. Classes are linked to each other, generally with one-to-many relationships.

我想将非行实体班和具体项目班分开。

我应如何发展这几类人之间的沟通(继承、使用或某类)。如何在将具体项目类别装入数据库时发展这种关系?

Answer 1

我猜测,自其桌面应用以来,它是一种基于“全心”的应用。因此,MVC的建筑在此最为合适。我也认为,你必须使用 Java豆来方便地利用这一模式。

首先界定了所有定义的模式。

说明

        class person
{
        public PropertyChangeSupport propertyChange = new PropertyChangeSupport(this);

        private String firstName;
        private String middleName;
        private String lastName;
        private int gender;
        private Integer age;
        .
        .

        set Fname(String firstName)
        {
                      propertyChangeSupport.firePropertyChange("firstName",this.firstName,this.firstName         = firstName);
        }
        .
        .
        .
        public void setPropertyChange(PropertyChangeSupport propertyChange) {
                this.propertyChange = propertyChange;
        }


         public PropertyChangeSupport getPropertyChange() {
                return propertyChange;
         }

        public void removePropertyChangeListener(PropertyChangeListener listener) {
        propertyChange.removePropertyChangeListener(listener);
        }

}

现在我们需要一个模式提供者,这将是一个单一州模式。

class PersonMOdelProvider
{

private static List<Person> lst ;
private static PersonMOdelProvider content;
private PersonMOdelProvider()
{
  // Get data from data base layer.
  lst = new ArrayList<Person>();
  //load the list from database
}

public static PersonModelProvider getInstance()
{
 if (content!=null) return content;
content = new PersonMOdelProvider();
return content;
}

.
.
.
set ... get methods for binding db with model. 

}

现在,在“倡议”方面,你首先需要了解模式提供者,并通过模型提供者进行进一步的互动。

友情链接