departmentnametag.java

学生信息管理系统

/**
 * @(#)DepartmentNameTag.java
 *
 *
 * @author 
 * @version 1.00 2007/7/2
 */
package tagext;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.Tag;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;
import java.io.IOException;
import java.util.ArrayList;
import javax.servlet.http.HttpSession;

import dao.*;
import vo.DepartmentVO;
public class DepartmentNameTag implements Tag
{
	private PageContext context=null;
	private Tag parent=null;
	private String name=null;
    public void setPageContext(PageContext context)
	{
		this.context=context;
	}

	public void setParent(Tag parent)
	{
		this.parent=parent;
	}
	public Tag getParent()
	{
		return this.parent;
	}
	
	public void setName(String name)
	{
		this.name=name;
	}
	public String getName()
	{
		return this.name;
	}	
	
	public int doStartTag()throws JspException
	{
		if(name.equals("department"))
		{
				DepartmentDAO departmentdao=new DepartmentDAO();
				ArrayList departments = departmentdao.getDepartments();
				JspWriter out=this.context.getOut();
				try
		    	{
		    		DepartmentVO department = null;
		    		out.println("<select name=department>");
		    		for(int i=0;i<departments.size();i++)
		    		{
		    			department = (DepartmentVO)departments.get(i);
		    			out.println("<option value="+department.getDepartmentId()+">"+department.getDepartmentName());	
		    		}
		    		out.println("</select>");
		    	}
		    	catch(IOException ioe)
		    	{
		    		ioe.printStackTrace();
		    	}
		    	
		}
		
	/*	if(name.equals("class"))
		{
				ClassDAO classdao=new ClassDAO();
				String[] class_names=classdao.getClassNames();
				JspWriter out=this.context.getOut();
				try
		    	{
		    		out.println("<select name=classNames>");
		    		for(int i=0;i<class_names.length;i++)
		    		{
		    			out.println("<option value="+class_names[i]+">"+class_names[i]);	
		    		}
		    		out.println("</select>");
		    	}
		    	catch(IOException ioe)
		    	{
		    		ioe.printStackTrace();
		    	}
		    	
		}*/
	
    	return this.SKIP_BODY;
	}
	
    public int doEndTag()throws JspException
    {
    	return this.EVAL_PAGE;
    }
    public void release()
	{
		this.context=null;
		this.parent=null;
		this.name=null;
	}
}