/*
 * Created on 2004-9-24
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package com.department;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import oa.sys.Db;
import oa.sys.Str;
/**
 ****************************************************
 *類名稱：	Del<br>
 *類功能：	刪除部門信息<br>
 *創建：	白偉明	2004年9月25日<br>
 ****************************************************
 * To change the template for this generated type comment go to
 * Window&gt;Preferences&gt;Java&gt;Code Generation&gt;Code and Comments
 */
public class Del extends HttpServlet{
	private HttpSession session=null;
	private Statement stmt=null;
	private ResultSet rs=null;
	private String sqld,sqls;
	private int temp=0,id=0;
	
	public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException{
		request.setCharacterEncoding("gb2312");
		response.setContentType("text/html; charset=gb2312");
		Str str=new Str();
		Db db=new Db();
		PrintWriter out=response.getWriter();
		session=request.getSession();
		try{
		id=Integer.parseInt((String)request.getParameter("id"));
		}catch(NumberFormatException e){
			e.printStackTrace();
		}
		sqld="DELETE FROM department WHERE departmentid="+id;
		sqls="SELECT * FROM department WHERE departmentid="+id;
		stmt=db.getStmtread();
		try {
			rs=stmt.executeQuery(sqls);
			//查詢添加部門是否存在
			if(rs.next()){
				rs.close();
				stmt.close();
				//刪除部門
				stmt=db.getStmt();
				temp=stmt.executeUpdate(sqld);
				if(temp>0){
					request.setAttribute("delmsg","刪除成功");
				}else{
					request.setAttribute("delmsg","刪除失敗");
				}
			}else{
				request.setAttribute("delmsg","該部門不存在");
			}
		} catch (SQLException e) {
			request.setAttribute("delmsg","刪除失敗,請刪除屬于此部門的所有員工");
			System.err.print(e.getMessage());
		}finally{
			db.close();
			RequestDispatcher dispatcher=request.getRequestDispatcher("del.jsp");
			dispatcher.forward(request,response);
		}
	}
	public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException{
		doPost(request,response);
	}
}