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MVC模式中,DAO及DAO實(shí)現(xiàn)層的優(yōu)化設(shè)計(jì):

一.DAO層

1.建立IBASEDAO,做為實(shí)現(xiàn)方法的標(biāo)準(zhǔn).

     public interface IBaseObjectDao <T, PK extends Serializable> {
 
 //通過(guò)id查詢記錄
 public T  getObjectById(PK id) throws Exception;
 
 //通過(guò)id刪除記錄
 public int delObjectById(PK id) throws Exception;
 
 //添加記錄
 public int addObject(T object) throws Exception;;
 
 //更新記錄
 public int updateObject(T object) throws Exception;
}

2.建立其他DAO接口,繼承IBASEDAO.

public interface IAgreementsDao
  extends IBaseObjectDao<Agreements, Integer> {}

二,DAO實(shí)現(xiàn)層

1.建立BASEDAO,實(shí)現(xiàn)IBASEDAO接口,并繼承用到的框架類.

public class BaseObjectDao<T, PK extends Serializable>
  extends JdbcDaoSupport
  implements IBaseObjectDao<T, PK> {

  public int addObject(T object){
    // TODO Auto-generated method stub
    return 0;
  }

  public int delObjectById(PK id){
    // TODO Auto-generated method stub
    return 0;
  }

  public T getObjectById(PK id){
    // TODO Auto-generated method stub
    return null;
  }

  public int updateObject(T object){
    // TODO Auto-generated method stub
    return 0;
  }

}

2.建立其他DAO實(shí)現(xiàn)類,使其繼承BASEDAO類,并實(shí)現(xiàn)相應(yīng)的DAO接口