delete.java

学生选课管理系统 struts hibernate

package com.action;
import javax.servlet.http.*;

import org.apache.struts.action.*;

import com.hibernate.BusinessService;
import com.hibernate.Course;
import com.hibernate.StudentCourse;

public class delete extends Action{
	public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response) throws Exception
	{		
		int id=Integer.parseInt(request.getParameter("id"));
		
		BusinessService bs=new BusinessService();
		StudentCourse sc=bs.loadSc(id);
		Course c=sc.getCourse();
		if(c.getNumOfStudents().intValue()>0)
			c.setNumOfStudents(new Integer(c.getNumOfStudents().intValue()-1));
		bs.deleteSc(id);
		bs.saveCourse(c);	

	
		return (mapping.findForward("deleteok"));	
	}
}