listcoursename.java

学校的课程管理及选课系统

package org.wangsong.service;

import java.util.Iterator;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspWriter;

import org.wangsong.dao.CourseDAO;
import org.wangsong.dao.DAOFactory;
import org.wangsong.domain.Course;

public class ListCourseName
{
	private CourseDAO couDao;

	public CourseDAO getCourseDAO()
	{
		return DAOFactory.getInstance().createCourseDAO();
	}

	// 异常还没有处理

	public void list(HttpServletRequest request, JspWriter out)
			throws Exception
	{

		String name = "", id = "";
		couDao = this.getCourseDAO();
		List list = couDao.getCourse();

		if (list == null)
		{
			out.print("尚无先修课信息");
			return;
		}

		int count = 0;
		Iterator it = list.iterator();
		Course cour;

		out.println("<select name='course_id' size='1'>");
		//out.println("<option value='无先修课' selected='selected'>无先修课</option>");
		while (it.hasNext() && count < 5)
		{
			cour = (Course) it.next();
			id = cour.getId();
			name = cour.getName();
			//out.println("<html:option value=" + id + ">" + name+ "</html:option>");

			out.println("<option value=" + id + ">" + name + "</option>");
		}
		out.println("</select>");
	}
}