protected void onSave(HttpServletRequest request,
HttpServletResponse response, ModelAndView mav, boolean isNew)
throws Exception {
String vpidstr = request.getParameter("proid");
Integer proid= 0;
if(vpidstr!=null){
proid= new Integer(vpidstr);
}
Video video = new Video();
if(proid != null){
video = videoManager.findByProductId(proid);
if(video !=null){
System.out.println("video 内容 belongs product id is :"+video.getProductId());
}
}else{
video = new Video();
}
System.out.println("difficult vpid"+proid);//取得到值
video.setProductId(proid);//NullPointerException异常?????
videoManager.save(video);//hibernate封装的saveorupdate();
String url = "/springside/admin/success.jsp";
System.out.println(url);
response.sendRedirect(url);
return;
}
Video的Hibernate配置:
<hibernate-mapping package="cn.idmtv.smsc.commons.domain">
<class name="Video" table="VIDEO">
<id name="id" column="ID">
<generator class="sequence">
<param name="sequence">SEQ_VIDEO</param>
</generator>
</id>
<property name="productId" column="PRODUCT_ID" not-null="true"/>
</class>
</hibernate-mapping>
--------------
video.setProductId(proid);中的proid可以取到值,为什么setProductId的时候会出现空指针呢?,就算没值,是不是也不该在这个地方报这样的错误啊?想了一天也没弄明白。帮我看看吧
HttpServletResponse response, ModelAndView mav, boolean isNew)
throws Exception {
String vpidstr = request.getParameter("proid");
Integer proid= 0;
if(vpidstr!=null){
proid= new Integer(vpidstr);
}
Video video = new Video();
if(proid != null){
video = videoManager.findByProductId(proid);
if(video !=null){
System.out.println("video 内容 belongs product id is :"+video.getProductId());
}
}else{
video = new Video();
}
System.out.println("difficult vpid"+proid);//取得到值
video.setProductId(proid);//NullPointerException异常?????
videoManager.save(video);//hibernate封装的saveorupdate();
String url = "/springside/admin/success.jsp";
System.out.println(url);
response.sendRedirect(url);
return;
}
Video的Hibernate配置:
<hibernate-mapping package="cn.idmtv.smsc.commons.domain">
<class name="Video" table="VIDEO">
<id name="id" column="ID">
<generator class="sequence">
<param name="sequence">SEQ_VIDEO</param>
</generator>
</id>
<property name="productId" column="PRODUCT_ID" not-null="true"/>
</class>
</hibernate-mapping>
--------------
video.setProductId(proid);中的proid可以取到值,为什么setProductId的时候会出现空指针呢?,就算没值,是不是也不该在这个地方报这样的错误啊?想了一天也没弄明白。帮我看看吧
如果是video.setProductId(proid);这行抛异常那就是video等于null
取得的是个空值