handin.java

来自「一个完整的学生管理 软件,界面优美,代码有注释,很容易看懂」· Java 代码 · 共 64 行

/**
 * Handin.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 Handin 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 x=request.getParameter("expense");
        float y=expense.getExpense();
        float x1=Float.parseFloat(x);
        float expense1=y-x1;
      
		//处理数据
        try
        {
        	expense.setExpense(expense1);
        	expensecontrol.UpdateExpense(table,expense);
        	expensecontrol.close();
        	session.setAttribute("expense",null);
        	out.print("<script>alert('成功缴纳！');window.location.href='/MyDesign/SearchExpense'</script>");
        }
        catch(Exception e)
        {
            System.out.print("UpdateExpenseServlet error:"+e.getMessage());            
        }
        finally
        {  
        }
    }
    
    //Clean up resources
    public void destroy()
    {
    }
}