multiple packages in context:component-scan, spring config

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The following approach is correct:

<context:component-scan base-package="x.y.z.service, x.y.z.controller" />

Note that the error complains about x.y.z.dao.daoservice.LoginDAO, which is not in the packages mentioned above, perhaps you forgot to add it:

<context:component-scan base-package="x.y.z.service, x.y.z.controller, x.y.z.dao" />

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