modifystudcourseexempt.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:   ModifyStudCourseExempt.java

package com.saintbo.servlet.student;

import com.saintbo.entity.student.TblCourseExempt;
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 java.text.DateFormat;
import javax.naming.InitialContext;
import javax.servlet.*;
import javax.servlet.http.HttpSession;

public class ModifyStudCourseExempt extends MyExtendedServlet
{

    public ModifyStudCourseExempt()
    {
    }

    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);
        Long rowsID = new Long((String)reqInfo.get("RowsID"));
        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 courseID = (String)reqInfo.get("CourseID");
        String replaceCourseID = (String)reqInfo.get("ReplaceCourseID");
        String replaceCourseName = (String)reqInfo.get("ReplaceCourseName");
        String replaceCourseIntro = (String)reqInfo.get("ReplaceCourseIntro");
        Float replaceCredit = new Float((String)reqInfo.get("ReplaceCredit"));
        String strApplyDate = (String)reqInfo.get("ApplyDate");
        String applyReason = (String)reqInfo.get("ApplyReason");
        String applyStatus = (String)reqInfo.get("ApplyStatus");
        String feedback = (String)reqInfo.get("Feedback");
        TblCourseExempt studCourseExempt = null;
        String errorMessage = "";
        boolean result = false;
        if(rowsID != null && studentID != null && !studentID.trim().equals(""))
            try
            {
                InitialContext jndiContext = new InitialContext();
                StudentSessionLocalHome home = (StudentSessionLocalHome)jndiContext.lookup("StudentSessionLocal");
                StudentSessionLocal local = home.create();
                java.util.Date applyDate = DateFormat.getDateInstance().parse(strApplyDate);
                studCourseExempt = local.getStudCourseExemptByID(rowsID);
                System.out.println("ApplyStatus is :" + studCourseExempt.getApplyStatus());
                if(studCourseExempt != null && studCourseExempt.getRowsID() != null)
                {
                    if(userInfo.getUserType().equals(new Integer(3)))
                    {
                        studCourseExempt.setCourseID(courseID);
                        studCourseExempt.setReplaceCourseID(replaceCourseID);
                        studCourseExempt.setReplaceCourseName(replaceCourseName);
                        studCourseExempt.setReplaceCourseIntro(replaceCourseIntro);
                        studCourseExempt.setReplaceCredit(replaceCredit);
                        studCourseExempt.setApplyDate(applyDate);
                        studCourseExempt.setApplyReason(applyReason);
                        studCourseExempt.setApplyStatus(applyStatus);
                        studCourseExempt.setFeedback(feedback);
                        result = true;
                    } else
                    if(userInfo.getUserType().equals(new Integer(1)))
                    {
                        if(studCourseExempt.getApplyStatus() == null || studCourseExempt.getApplyStatus().equals("0"))
                        {
                            studCourseExempt.setCourseID(courseID);
                            studCourseExempt.setReplaceCourseID(replaceCourseID);
                            studCourseExempt.setReplaceCourseName(replaceCourseName);
                            studCourseExempt.setReplaceCourseIntro(replaceCourseIntro);
                            studCourseExempt.setReplaceCredit(replaceCredit);
                            studCourseExempt.setApplyDate(applyDate);
                            studCourseExempt.setApplyReason(applyReason);
                            result = true;
                        } else
                        {
                            errorMessage = "该免修信息已经回复，不能再修改.";
                        }
                    } else
                    {
                        errorMessage = "你没有权限修改学生的免修信息.";
                    }
                } else
                {
                    errorMessage = "在数据库中找不到该条学生的免修信息.";
                }
                local.remove();
                jndiContext.close();
            }
            catch(Exception e)
            {
                errorMessage = "当修改学生免修信息时出现错误.";
                result = false;
                e.printStackTrace();
            }
        else
            errorMessage = "传进来的学生学号不能为空.";
        if(result)
        {
            getServletContext().getRequestDispatcher("/student/studcourseexempt.jsp?RowsID=" + studCourseExempt.getRowsID()).forward(req, res);
        } else
        {
            session.setAttribute("ERRORMESSAGE", errorMessage);
            getServletContext().getRequestDispatcher("/error/error.jsp").forward(req, res);
        }
    }
}