摘要: Spring-MVC如何使用拦截器，官方文档只给出了非注解风格的例子。那么基于注解风格如何使用拦截器呢？
基于注解基本上有2个可使用的定义类，分别是DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter。  阅读全文

     摘要: 1. org.datanucleus.store.exceptions.NoTableManagedException
2. org.datanucleus.exceptions.NucleusUserException A parent cannot be established or changed once an object has been persisted.
3. java.lang.IllegalArgumentException: can't operate on multiple entity groups in a single transaction
4. 404 happened when visit online but ok in local environment
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     摘要: 地址是： http://atealxt.appspot.com/  阅读全文

     摘要: 1. pojo compile warning
2. com.google.apphosting.api.ApiProxy$CallNotFoundException
3. org.datanucleus.exceptions.NucleusUserException
4. java.lang.NoClassDefFoundError: javax/naming/NamingException
5. java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.String
6. one to many relationship doesn't work   阅读全文