addstudent.java

利用java编写的一个学生宿舍管理系统

/**
 * AddStudent.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 AddStudent 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 
    {
        request.setCharacterEncoding("gb2312");
        response.setContentType("text/html; charset=gb2312");
        PrintWriter out = response.getWriter();
        
        Student student=new Student();
        StudentControl studentcontrol=new StudentControl();
        
        String studentid=request.getParameter("studentid");
        String name=request.getParameter("name");
        String sex=request.getParameter("sex");
        String home=request.getParameter("home");
        String years=request.getParameter("years");;
        String nianzhi=request.getParameter("nianzhi");
        String xueyuan=request.getParameter("xueyuan");
        String classid=request.getParameter("classid");
        String extra=request.getParameter("extra");
        
      
		//处理数据
        try
        {
        	if(!studentcontrol.isExistStudent(studentid))
        	{
        		student.setStudentid(studentid);
        		student.setName(name);
        		student.setSex(sex);
        		student.setHome(home);
        		student.setYears(years);
        		student.setNianzhi(nianzhi);
        		student.setXueyuan(xueyuan);
        		student.setClassid(classid);
        		student.setExtra(extra);
        		studentcontrol.addStudent(student);
        		studentcontrol.close();
        		out.print("<script>alert('成功添加！');window.location.href='addstudent.jsp'</script>");
        	}
        	else
        	{
        		out.print("<script>alert('对不起！已经存在该学生！');history.back()</script>");
        	}
        }
        catch(Exception e)
        {
            System.out.print("AddStudentServlet error:"+e.getMessage());            
        }
        finally
        {
        }
    }
    
    //Clean up resources
    public void destroy()
    {
    }
}