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hibernate corrupts character encoding when migrated to oracle with utf-16
SELECT * FROM NLS_DATABASE_PARAMETERS;
NLS_NCHAR_CHARACTERSET  UTF8
NLS_CHARACTERSET    WE8ISO8859P1

SELECT * FROM NLS_DATABASE_PARAMETERS;
NLS_NCHAR_CHARACTERSET  AL16UTF16
NLS_CHARACTERSET        WE8MSWIN1252

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="hibernateProperties">
        <value>

            hibernate.connection.characterEncoding=UTF16
            hibernate.connection.charSet=UTF16
            hibernate.connection.useEncoding=true
            hibernate.connection.defaultNChar=true