JavaBeat

The following exception is very common if you are the beginner for hibernate. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Exception in thread "main" org.hibernate.hql.ast.QuerySyntaxException: book is not mapped [from book] at org.hibernate.hql.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:158) at org.hibernate.hql.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:87) at org.hibernate.hql.ast.tree.FromClause.addFromElement(FromClause.java:70) at org.hibernate.hql.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:255) at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3056) [...]

Introduction Most of the webapplications are implemented by Model-View-Controller(MVC) pattern. There are plenty of good frameworks use the MVC paradigm. Obviously, MVC becomes defacto standard for a webapplication because of it’s maintainability and clear seperation of presentation layer and the business layer. Spring is one amoung the group, a lightweight container used in the enterprise [...]