updateexpense.java

利用java编写的一个学生宿舍管理系统

/**
 * UpdateExpense.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 UpdateExpense 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();
        
        Expense expense=(Expense)session.getAttribute("expense");
        String table=(String)session.getAttribute("table");
        ExpenseControl expensecontrol=new ExpenseControl();
        
        String dishu=request.getParameter("dishu");
        String xianshu=request.getParameter("xianshu");
        String shangci=request.getParameter("shangci");;
        String newdate=request.getParameter("newdate");
        String expense1=request.getParameter("expense");

      
		//处理数据
        try
        {
        	expense.setDishu(Float.parseFloat(dishu));
        	if(!shangci.equals("")) expense.setShangci(java.sql.Date.valueOf(shangci));
        	else expense.setShangci(java.sql.Date.valueOf("2000-01-01"));
        	if(!newdate.equals("")) expense.setNewdate(java.sql.Date.valueOf(newdate));
        	else expense.setNewdate(java.sql.Date.valueOf("2000-01-01"));
        	if(!expense1.equals("")) expense.setExpense(Float.parseFloat(expense1));
        	else expense.setExpense(-1000);
        	out.print(expense.getDishu()+"<br>"+expense.getXianshu()+"<br>"+expense.getShangci()+"<br>"+expense.getNewdate()+"<br>"+expense.getExpense());
        	expensecontrol.UpdateExpense(table,expense);
        	expensecontrol.close();
        	session.setAttribute("expense",null);
        	out.print("<script>alert('成功修改！');window.location.href='/MyDesign/SearchExpense'</script>");
        }
        catch(Exception e)
        {
            System.out.print("UpdateExpenseServlet error:"+e.getMessage());            
        }
        finally
        {  
        }
    }
    
    //Clean up resources
    public void destroy()
    {
    }
}