findcommand.java

利用JAVA开发的简单考试系统

package controller.command;
import model.persistency.PersistentItem;
import model.condition.visitor.Visitor;
import java.sql.SQLException;
import model.condition.visitor.SingleVisitor;
/**
 * <p>Title: </p>
 *  查找命令
 * <p>Description: </p>
 *  继承OperateCommand，通过此类与MODEL层联系，调用model层的查找
 */
public class FindCommand implements OperateCommand{
    String ID;
    public FindCommand(String id) {
        ID = id;
    }
    public PersistentItem excute(String id){
        Visitor v = new SingleVisitor();
        PersistentItem it = new PersistentItem(0);
                try{
                it = v.FindItem(ID);
                }catch(SQLException e){System.out.println("sql wrong");}
           return it;
          }

     public void excute(){
             Visitor v = new SingleVisitor();
             PersistentItem it = new PersistentItem(0);
                     try{
                      v.FindId(ID);
                     }catch(SQLException e){System.out.println("sql wrong");}
               }

}