queryteachinginformationtag.java

学生信息管理系统

package tagext;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import vo.TeachingVO;
import dao.TeachingDAO;
import java.io.*;
import java.util.*;
public class QueryTeachingInformationTag extends TagSupport
{
	public int doStartTag()throws JspException
	{
		HttpServletRequest request=(HttpServletRequest)pageContext.getRequest();
		HttpSession session=request.getSession(true);
		JspWriter out=pageContext.getOut();
		ArrayList teachingInfors=null;
		TeachingVO teachingvo=null;
		if(session.getAttribute("teachingInfors")!=null)
		{
			try
			{
				teachingInfors=(ArrayList)session.getAttribute("teachingInfors");
				out.println("<table align=center border=1>");
				out.println("<tr>");
				out.println("<td align=center><font size=5 color=blue>教师工号");
				out.println("</td>");
				out.println("<td align=center><font size=5 color=blue>班级号");
				out.println("</td>");
				out.println("<td align=center><font size=5 color=blue>课程号");
				out.println("</td>");
				out.println("<td align=center><font size=5 color=blue>学期");
				out.println("</td>");
				out.println("</tr>");
				
				for(int i=0;i<teachingInfors.size();i++)
				
				{
					teachingvo=(TeachingVO)teachingInfors.get(i);
					out.println("<tr>");
					out.println("<td align=center><font size=5 color=blue>"+teachingvo.getTeacherId());
					out.println("</td>");
					out.println("<td align=center><font size=5 color=blue>"+teachingvo.getClassId());
					out.println("</td>");
					out.println("<td align=center><font size=5 color=blue>"+teachingvo.getCourseId());
					out.println("</td>");
					out.println("<td align=center><font size=5 color=blue>"+teachingvo.getTerm());
					out.println("</td>");
					out.println("</tr>");
				}
				
							
				out.println("</table>");
			}
			catch(IOException ioe)
		    {
		    	ioe.printStackTrace();
		    }
		}
		
		return this.SKIP_PAGE;
	}
	public int doEndTag()throws JspException
	{
		return this.EVAL_PAGE;
	}
}