问题描述

hibernateutils中get方法查询的对象为空

/**

• 根据id查询
• @param clazz
• @param id
• @return
  */

public static Object get(Class clazz,Serializable id){
Session s=null;
try{
s=HibernateUtil.getSession();
Object obj=s.get(clazz, id);
return obj;
}finally{
if(s!=null){
s.close();
}
}
}

servlet 如下

public class CollectDelete extends HttpServlet {
private static final long serialVersionUID = 1L;
Class clazz=Collect.class;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
//String username = request.getParameter("username");
int shopid = Integer.parseInt(request.getParameter("shopid"));
Collect collect=new Collect();
//Object obj=HibernateUtil.get(clazz, shopid);
collect=(Collect) HibernateUtil.get(clazz, shopid);
response.setContentType("text/html;charset=UTF-8");
if(collect!= null){
    System.out.println(collect.getUsername());
    HibernateUtil.delete(collect);
    response.getWriter().println("删除成功");
}else{
    response.getWriter().println("卧槽失败了");
}
}

}

为啥shopid传进去了，查到的collect为空呢