exchange.java

利用java编写的一个学生宿舍管理系统

/**
 * ExchangeStudentHouse.java
 * author:liuhaijing
 * @version 1.0
 */
 
 package mydesign;//包名

import java.io.*;
import mydesign.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class Exchange extends HttpServlet
{
  
    //Initialize global variables
    public void init() throws ServletException 
    {
    }
    
    //Process the HTTP Post request
    public void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException 
    {
    	HttpSession session=request.getSession(true);
        request.setCharacterEncoding("gb2312");
        response.setContentType("text/html; charset=gb2312");
        PrintWriter out = response.getWriter();
        
        Student student=new Student();
        StudentControl studentcontrol=new StudentControl();
        HouseControl housecontrol=new HouseControl();
        ExpenseControl expensecontrol=new ExpenseControl();
        
        String studentid=request.getParameter("studentid");
        String ydonghao=request.getParameter("ydonghao");
        String yhouseid=request.getParameter("yhouseid");
        String xdonghao=request.getParameter("xdonghao");
        String xhouseid=request.getParameter("xhouseid");
        String intime=request.getParameter("intime");
      
		//处理数据
        try
        {
        	student.setStudentid(studentid);
        	student.setDonghao(ydonghao);
        	student.setHouseid(yhouseid);
        	if(studentcontrol.isExistStudent(studentid))
        	{
        		if(housecontrol.isExistHouse(ydonghao,yhouseid))
        		{
        			if(studentcontrol.isExistStudentHouse(student))
        			{
        				if(housecontrol.isExistHouse(xdonghao,xhouseid))
        				{
        					student=studentcontrol.getStudentInfo(1,studentid);
        					House house=housecontrol.getHouseInfo(xdonghao,xhouseid);
        					if(house.getSex().equals(student.getSex()))
        					{
        						if(house.getKezhu()>house.getRuzhu())
        						{
        							student.setDonghao(xdonghao);
        							student.setHouseid(xhouseid);
        							studentcontrol.UpdateStudentHouse(student);
        							student.setIntime(java.sql.Date.valueOf(intime));
        							if(house.getRuzhu()==0)
        							{
        								expensecontrol.setExpense(student);
        							}
        							housecontrol.addStudent(xdonghao,xhouseid);
        							housecontrol.delStudent(ydonghao,yhouseid);
        							studentcontrol.close();
        							housecontrol.close();
        							out.print("<script>alert('成功登记调房！');window.location.href='exchange.jsp'</script>");
        						}else  out.print("<script>alert('目的房间已满员！');history.back()</script>");
        					}else  out.print("<script>alert('性别不符！');history.back()</script>");
        				}else  out.print("<script>alert('目的房间不存在！');history.back()</script>");
        			}else  out.print("<script>alert('原房间没有该学生！');history.back()</script>");
        		}else  out.print("<script>alert('原房间不存在！');history.back()</script>");
        	}else  out.print("<script>alert('没有该学生的资料！');history.back()</script>");
        }catch(Exception e)
        {
            System.out.print("DelStudentHouseServlet error:"+e.getMessage());            
        }
    }
    
    //Clean up resources
    public void destroy()
    {
    }
}