queryonestudenttag.java

学生信息管理系统

package tagext;
import javax.servlet.jsp.PageContext;
import java.io.*;
import javax.servlet.jsp.JspException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspWriter;
import java.util.*;
import javax.servlet.jsp.tagext.TagSupport;
import javax.servlet.http.HttpSession;
import vo.StudentVO;
import dao.StudentDAO;
public class QueryOneStudentTag extends TagSupport
{
	public int doStartTag()throws JspException
	{
		JspWriter out=pageContext.getOut();
		HttpServletRequest request=(HttpServletRequest)pageContext.getRequest();
		HttpSession session=request.getSession(true);
		if(session.getAttribute("studentById")!=null)
		{
			try
			{
				StudentVO student = (StudentVO)session.getAttribute("studentById");
				out.print("<table align=center border=1>");
				out.print("<form>");
				out.print("<tr>");
		    	out.print("<td align=center><font size=5 color=blue>学生编号</td><td align=center><font size=5 color=blue>"+student.getStudentId()+"</td>");
		    	out.print("</tr>");
		    	out.print("<tr>");
		    	out.print("<td align=center><font size=5 color=blue>学生姓名</td><td align=center> <font size=5 color=blue>"+student.getStudentName()+"</td>");
		    	out.print("</tr>");
		    	out.print("<tr>");
		    	out.print("<td align=center><font size=5 color=blue>班级名称</td><td align=center><font size=5 color=blue>"+student.getClassId()+"</td>");
		    	out.print("</tr>");
		    	out.print("<tr>");
		    	out.print("<td align=center><font size=5 color=blue>性别</td><td align=center><font size=5 color=blue>"+student.getSex()+"</td>");
		    	out.print("</tr>");
		    	out.print("<tr>");
		    	out.print("<td align=center><font size=5 color=blue>生日</td><td align=center><font size=5 color=blue>"+student.getBirthday()+"</td>");
		    	out.print("</tr>");
		    	out.print("<tr>");
		    	out.print("<td align=center><font size=5 color=blue>电话</td><td align=center><font size=5 color=blue>"+student.getPhone()+"</td>");
		    	out.print("</tr>");
		    	out.print("<tr>");
		    	out.print("<td align=center><font size=5 color=blue>Email</td><td align=center><font size=5 color=blue>"+student.getEmail()+"</td>");
		    	out.print("</tr>");
		    	out.print("<tr>");
		    	out.print("<td align=center><font size=5 color=blue>地址</td><td align=center><font size=5 color=blue>"+student.getAddress()+"</td>");
		    	out.print("</tr>");
		    	out.print("</form>");
		    	out.print("</table>");	
			}
		    catch(IOException ioe)
		    {
		    	ioe.printStackTrace();
		    }
		}
		else if(session.getAttribute("studentByName")!=null)
		{
			try
			{
				ArrayList student = (ArrayList)session.getAttribute("studentByName");
				out.print("<table align=center border=1>");
				out.println("<tr>");
				out.println("<td align=center><font size=5 color=blue>学号");
				out.println("</td>");
				out.println("<td align=center><font size=5 color=blue>学生姓名");
				out.println("</td>");
				out.println("<td align=center><font size=5 color=blue>班级编号");
				out.println("</td>");
				out.println("<td align=center><font size=5 color=blue>性别");
				out.println("</td>");
				out.println("<td align=center><font size=5 color=blue>生日");
				out.println("</td>");
				out.println("<td align=center><font size=5 color=blue>电话");
				out.println("</td>");
				out.println("<td align=center><font size=5 color=blue>Email");
				out.println("</td>");
				out.println("<td align=center><font size=5 color=blue>地址");
				out.println("</td>");
				out.println("</tr>");
				
				for(int i=0;i<student.size();i++)
				
				{
					StudentVO studentvo=(StudentVO)student.get(i);
					out.println("<tr>");
					out.println("<td align=center><font size=5 color=blue>"+studentvo.getStudentId());
					out.println("</td>");
					out.println("<td align=center><font size=5 color=blue>"+studentvo.getStudentName());
					out.println("</td>");
					out.println("<td align=center><font size=5 color=blue>"+studentvo.getClassId());
					out.println("</td>");
					out.println("<td align=center><font size=5 color=blue>"+studentvo.getSex());
					out.println("</td>");
					out.println("<td align=center><font size=5 color=blue>"+studentvo.getBirthday());
					out.println("</td>");
					out.println("<td align=center><font size=5 color=blue>"+studentvo.getPhone());
					out.println("</td>");
					out.println("<td align=center><font size=5 color=blue>"+studentvo.getEmail());
					out.println("</td>");
					out.println("<td align=center><font size=5 color=blue>"+studentvo.getAddress());
					out.println("</td>");
					out.println("</tr>");
				}
		    	out.println("</table>");	
			}
		    catch(IOException ioe)
		    {
		    	ioe.printStackTrace();
		    }
		}
		return this.SKIP_BODY;
	}
	public int doEndTag()throws JspException
	{
		return this.EVAL_PAGE;
	}
}