modifystudentextinfo.java

servlet做控制层示例

// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi 
// Source File Name:   ModifyStudentExtInfo.java

package com.saintbo.servlet.student;

import com.saintbo.entity.student.TblStudentExtInfo;
import com.saintbo.javabean.sys.UserInfo;
import com.saintbo.servlet.MyExtendedServlet;
import com.saintbo.session.student.StudentSessionLocal;
import com.saintbo.session.student.StudentSessionLocalHome;
import com.saintbo.util.upload.RequestHashtable;
import com.saintbo.util.upload.UploadRequest;
import java.io.IOException;
import java.io.PrintStream;
import javax.naming.InitialContext;
import javax.servlet.*;
import javax.servlet.http.HttpSession;

public class ModifyStudentExtInfo extends MyExtendedServlet
{

    public ModifyStudentExtInfo()
    {
    }

    public void handle()
        throws IOException, ServletException
    {
        UserInfo userInfo = (UserInfo)session.getAttribute("USERINFO");
        int userAuthority = super.checkAuthority(userInfo, 1, 0);
        if(userAuthority != 1)
            return;
        reqInfo = UploadRequest.upload(req);
        TblStudentExtInfo studentExtInfo = null;
        String studentID = "";
        if(userInfo.getUserType().equals(new Integer(1)))
            studentID = userInfo.getUserID();
        else
        if(userInfo.getUserType().equals(new Integer(3)))
            studentID = (String)reqInfo.get("StudentID");
        String eduLevel = (String)reqInfo.get("EduLevel");
        String jobLevel = (String)reqInfo.get("JobLevel");
        String position = (String)reqInfo.get("Position");
        boolean result = false;
        String errorMessage = "";
        if(studentID != null && !studentID.trim().equals(""))
            try
            {
                InitialContext jndiContext = new InitialContext();
                StudentSessionLocalHome home = (StudentSessionLocalHome)jndiContext.lookup("StudentSessionLocal");
                StudentSessionLocal local = home.create();
                studentExtInfo = local.getStudentExtInfoByStudentID(studentID);
                if(studentExtInfo != null)
                {
                    studentExtInfo.setEduLevel(eduLevel);
                    studentExtInfo.setJobLevel(jobLevel);
                    studentExtInfo.setPosition(position);
                    result = true;
                } else
                {
                    errorMessage = "在数据库中找不到学号为' " + studentID + "' 的学生附加信息.";
                }
                local.remove();
                jndiContext.close();
            }
            catch(Exception e)
            {
                errorMessage = "修改学生附加信息时出错.";
                System.out.println("修改学生附加信息时出错.");
                e.printStackTrace();
            }
        else
            errorMessage = "传进来的学生学号不能为空.";
        if(result)
        {
            getServletContext().getRequestDispatcher("/student/studextinfo.jsp?StudentID=" + studentID).forward(req, res);
        } else
        {
            session.setAttribute("ERRORMESSAGE", errorMessage);
            getServletContext().getRequestDispatcher("/error/error.jsp").forward(req, res);
        }
    }
}