Java 泛型 实例

ACTION
--------
try {
  this.journal = this.journalService.getById(TbJournal.class, Long.valueOf(super.getParameter("id")));
} catch (NumberFormatException e) {

service
-------------
public <T> T getById(Class<T> t,Long id) throws BOException;
public <T> T getById(Class<T> t,Long id) throws BOException {
		try {
			return this.journalDAO.getObjById(t, id);
		} catch (DAOException e) {
			throw new BOException(e,this.getClass());
		}
	}

DAO
--------
public <T> T getObjById(Class<T> t,Long id) throws DAOException;
public <T> T getObjById(Class<T> t, Long id) throws DAOException {
		return (T)this.getByID(t, id);
	}