classactions.java

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/*
 * ClassActions.java
 *
 * Created on 2006年6月5日, 上午1:51
 *
 * 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 ClassActions extends DispatchAction {

    private Integer id;
    private Integer teacherId;
    private Integer specialId;
    private Integer enrollYear;
    private String name;
    private ClassService cs = (ClassService)ServiceFactory.makeService("ClassService");
    
    private void loadForm(javax.servlet.http.HttpServletRequest request){
        this.name = request.getParameter("name");
        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 intSpecialId = Integer.parseInt(request.getParameter("specialId"));
            this.specialId = new Integer(intSpecialId);
        }catch(Exception e){
            this.specialId = null;
        }
        try{
            int intEnrollYear = Integer.parseInt(request.getParameter("enrollYear"));
            this.enrollYear = new Integer(intEnrollYear);
        }catch(Exception e){
            this.enrollYear = null;
        }
    }
    
    //添加班级
    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);
            enova.pojo.Class c = new enova.pojo.Class(name,specialId,enrollYear);
            c.setTeacher( new Teacher(teacherId) );
            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);
    }
    
    //删除班级
    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);
        }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);
        }finally{
            try{
                request.setAttribute("classes",cs.getBySpecialId(specialId));
            }catch(StoreException se){
                request.setAttribute(Const.MESSAGES,"数据库出错");
                return mapping.findForward(Const.STORE_EXCEPTION);
            }
        }
        return mapping.findForward(Const.VIEW);
    }
    
    //修改班级
    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);
            enova.pojo.Class c = new enova.pojo.Class(name,specialId,enrollYear);
            c.setTeacher(new Teacher(teacherId));
            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("class",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);
    }
    
    //根据ID获取班级
    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("class",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);
    }
    
    //查看班级
    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( specialId!=null && enrollYear!=null )
                list = cs.getBySpecialIdAndEnrollYear(specialId,enrollYear);
            else if( specialId!=null && enrollYear==null )
                list = cs.getBySpecialId(specialId);
            else if( specialId==null ){
                request.setAttribute(Const.MESSAGES,"请选择先一个专业");
                list = cs.getBySpecialId(null);
            }
            request.setAttribute("classes",list);
        }catch(StoreException se){
            request.setAttribute(Const.MESSAGES,"数据库出错");
            return mapping.findForward(Const.STORE_EXCEPTION);
        }
        return mapping.findForward(Const.VIEW);
    }
}