teacheractions.java

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/*
 * TeacherActions.java
 *
 * Created on 2006年6月3日, 下午7:42
 *
 * 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 TeacherActions extends DispatchAction {
    
    private Integer id;
    private String username;
    private String password;
    private String name;
    private String sex;
    private TeacherService ts = (TeacherService)ServiceFactory.makeService("TeacherService");
    
    private void loadForm(javax.servlet.http.HttpServletRequest request){
        this.username = request.getParameter("username");
        this.password = request.getParameter("password");
        this.name = request.getParameter("name");
        this.sex = request.getParameter("sex");
        try{
            int intId = Integer.parseInt(request.getParameter("id"));
            this.id = new Integer(intId);
        }catch(Exception e){
            this.id = null;
        }
    }
    
    //添加教师
    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);
            Teacher t = new Teacher(username,password,name);
            t.setSex(sex);
            ts.updateOrCreate(t);
        }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);
    }
    
    //根据ID删除老师
    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);
            ts.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("teachers",ts.getByUsername(null));
            }catch(StoreException se){
                request.setAttribute(Const.MESSAGES,"数据库出错");
                return mapping.findForward(Const.STORE_EXCEPTION);
            }
        }
        return mapping.findForward(Const.VIEW);
    }
    
    
    //获取教师 for 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( (username!=null&&username.length()>0) && (name!=null&&name.length()>0))
                list = ts.getByNameAndUsername(name,username);
            else if(username!=null && username.length()>0)
                list = ts.getByUsername(username);
            else
                list = ts.getByName(name);
            request.setAttribute("teachers",list);
        }catch(StoreException se){
            request.setAttribute(Const.MESSAGES,"数据库出错");
            return mapping.findForward(Const.STORE_EXCEPTION);
        }
        return mapping.findForward(Const.VIEW);
    }
    
    
    //获取教师 for update
    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("teacher",ts.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);
    }
    
    
    //修改
    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);
            Teacher t = new Teacher(username,password,name);
            t.setSex(sex);
            t.setId(id);
            ts.updateOrCreate(t);
        }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);
        }finally{
            try{
                request.setAttribute("teacher",ts.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);
    }
}