courseactions.java

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/*
 * CourseActions.java
 *
 * Created on 2006年6月6日, 下午11:46
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package enova.web.struts.action;

import javax.servlet.http.*;
import org.apache.struts.action.*;
import enova.service.*;
import enova.pojo.*;
import enova.util.Const;

/**
 *
 * @author vlinux
 */
public class CourseActions extends DispatchAction {
    
    private Integer id;
    private String name;//
    private Integer teacherId;//
    private Integer hour;
    private Float credit;//
    private Integer year;//
    private String term;//
    private String examMode;
    private String examType;
    private String type;
    private CourseService cs = (CourseService)ServiceFactory.makeService("CourseService");
    
    private void loadForm(javax.servlet.http.HttpServletRequest request){
        this.name = request.getParameter("name");
        this.term = request.getParameter("term");
        this.examMode = request.getParameter("examMode");
        this.examType = request.getParameter("examType");
        this.type = request.getParameter("type");
        try{
            int intId = Integer.parseInt(request.getParameter("id"));
            this.id = new Integer(intId);
        }catch(Exception e){
            this.id = null;
        }
        try{
            int intTeacherId = Integer.parseInt(request.getParameter("teacherId"));
            this.teacherId = new Integer(intTeacherId);
        }catch(Exception e){
            this.teacherId = null;
        }
        try{
            int intYear = Integer.parseInt(request.getParameter("year"));
            this.year = new Integer(intYear);
        }catch(Exception e){
            this.year = null;
        }
        try{
            int intHour = Integer.parseInt(request.getParameter("hour"));
            this.hour = new Integer(intHour);
        }catch(Exception e){
            this.hour = null;
        }
        try{
            float floatCredit = Float.parseFloat(request.getParameter("credit"));
            this.credit = new Float(floatCredit);
        }catch(Exception e){
            this.credit = null;
        }
    }
    
    
    //添加课程
    public ActionForward add(ActionMapping mapping, ActionForm actionForm,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        if( this.verifyRoot(request) )
            return mapping.findForward(Const.ACCESS_DENY);
        try{
            loadForm(request);
            Course c = new Course(name,credit,year,term,teacherId);
            c.setHour(hour);
            c.setExamMode(examMode);
            c.setExamType(examType);
            c.setType(type);
            cs.updateOrCreate(c);
        }catch(StoreException se){
            request.setAttribute(Const.MESSAGES,"数据库出错");
            return mapping.findForward(Const.STORE_EXCEPTION);
        }catch(UniqueException ue){
            request.setAttribute(Const.MESSAGES,"该记录已经存在");
            return mapping.findForward(Const.ADD);
        }
        request.setAttribute(Const.MESSAGES,"创建成功");
        return mapping.findForward(Const.ADD);
    }
    
    
    //删除课程
    public ActionForward delete(ActionMapping mapping, ActionForm actionForm,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        if( this.verifyRoot(request) )
            return mapping.findForward(Const.ACCESS_DENY);
        try{
            loadForm(request);
            cs.delete(id);
            request.setAttribute("courses",cs.getByYear(null));
        }catch(StoreException se){
            request.setAttribute(Const.MESSAGES,"数据库出错");
            return mapping.findForward(Const.STORE_EXCEPTION);
        }catch(NotExistException nee){
            request.setAttribute(Const.MESSAGES,"记录不存在");
            return mapping.findForward(Const.VIEW);
        }
        request.setAttribute(Const.MESSAGES,"删除成功");
        return mapping.findForward(Const.VIEW);
    }
    
    
    
    //修改课程
    public ActionForward update(ActionMapping mapping, ActionForm actionForm,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        if( this.verifyRoot(request) )
            return mapping.findForward(Const.ACCESS_DENY);
        try{
            loadForm(request);
            Course c = new Course(name,credit,year,term,teacherId);
            c.setHour(hour);
            c.setExamMode(examMode);
            c.setExamType(examType);
            c.setType(type);
            c.setId(id);
            cs.updateOrCreate(c);
        }catch(StoreException se){
            request.setAttribute(Const.MESSAGES,"数据库出错");
            return mapping.findForward(Const.STORE_EXCEPTION);
        }catch(UniqueException ue){
            request.setAttribute(Const.MESSAGES,"该记录已经存在");
            return mapping.findForward(Const.UPDATE);
        }finally{
            try{
                request.setAttribute("course",cs.get(id));
            }catch(StoreException se){
                request.setAttribute(Const.MESSAGES,"数据库出错");
                return mapping.findForward(Const.STORE_EXCEPTION);
            }
        }
        request.setAttribute(Const.MESSAGES,"修改成功");
        return mapping.findForward(Const.UPDATE);
    }
    
    
    //获取课程
    public ActionForward get(ActionMapping mapping, ActionForm actionForm,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        if( this.verifyRoot(request) )
            return mapping.findForward(Const.ACCESS_DENY);
        try{
            loadForm(request);
            request.setAttribute("course",cs.get(id));
        }catch(StoreException se){
            request.setAttribute(Const.MESSAGES,"数据库出错");
            return mapping.findForward(Const.STORE_EXCEPTION);
        }
        return mapping.findForward(Const.UPDATE);
    }
    
    
    
    //view
    public ActionForward view(ActionMapping mapping, ActionForm actionForm,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        if( this.verifyRoot(request) )
            return mapping.findForward(Const.ACCESS_DENY);
        try{
            loadForm(request);
            java.util.List list = null;
            if( year!=null && term!=null && term.length()>0 )
                list = cs.getByYearAndTerm(year,term);
            else if( year!=null )
                list = cs.getByYear(year);
            else{
                list = cs.getByYear(null);
            }
            request.setAttribute("courses",list);
        }catch(StoreException se){
            request.setAttribute(Const.MESSAGES,"数据库出错");
            return mapping.findForward(Const.STORE_EXCEPTION);
        }
        return mapping.findForward(Const.VIEW);
    }
    
}