java - eclipse 自动生成的hibernateDAO出现错误

DAO自动生成代码

public class UserinfoHome {

    private static final Log log = LogFactory.getLog(UserinfoHome.class);

    private final SessionFactory sessionFactory = getSessionFactory();

    protected SessionFactory getSessionFactory() {
        try {
            return (SessionFactory) new InitialContext().lookup("SessionFactory");
        } catch (Exception e) {
            log.error("Could not locate SessionFactory in JNDI", e);
            throw new IllegalStateException("Could not locate SessionFactory in JNDI");
        }
    }

    public void persist(Userinfo transientInstance) {
        log.debug("persisting Userinfo instance");
        try {
            sessionFactory.getCurrentSession().persist(transientInstance);
            log.debug("persist successful");
        } catch (RuntimeException re) {
            log.error("persist failed", re);
            throw re;
        }
    }

    public void attachDirty(Userinfo instance) {
        log.debug("attaching dirty Userinfo instance");
        try {
            sessionFactory.getCurrentSession().saveOrUpdate(instance);
            log.debug("attach successful");
        } catch (RuntimeException re) {
            log.error("attach failed", re);
            throw re;
        }
    }

    public void attachClean(Userinfo instance) {
        log.debug("attaching clean Userinfo instance");
        try {
            sessionFactory.getCurrentSession().lock(instance, LockMode.NONE);
            log.debug("attach successful");
        } catch (RuntimeException re) {
            log.error("attach failed", re);
            throw re;
        }
    }

    public void delete(Userinfo persistentInstance) {
        log.debug("deleting Userinfo instance");
        try {
            sessionFactory.getCurrentSession().delete(persistentInstance);
            log.debug("delete successful");
        } catch (RuntimeException re) {
            log.error("delete failed", re);
            throw re;
        }
    }

    public Userinfo merge(Userinfo detachedInstance) {
        log.debug("merging Userinfo instance");
        try {
            Userinfo result = (Userinfo) sessionFactory.getCurrentSession().merge(detachedInstance);
            log.debug("merge successful");
            return result;
        } catch (RuntimeException re) {
            log.error("merge failed", re);
            throw re;
        }
    }

    public Userinfo findById(java.lang.Integer id) {
        log.debug("getting Userinfo instance with id: " + id);
        try {
            Userinfo instance = (Userinfo) sessionFactory.getCurrentSession().get("com.po.Userinfo", id);
            if (instance == null) {
                log.debug("get successful, no instance found");
            } else {
                log.debug("get successful, instance found");
            }
            return instance;
        } catch (RuntimeException re) {
            log.error("get failed", re);
            throw re;
        }
    }

    public List findByExample(Userinfo instance) {
        log.debug("finding Userinfo instance by example");
        try {
            List results = sessionFactory.getCurrentSession().createCriteria("com.po.Userinfo")
                    .add(Example.create(instance)).list();
            log.debug("find by example successful, result size: " + results.size());
            return results;
        } catch (RuntimeException re) {
            log.error("find by example failed", re);
            throw re;
        }
    }
}

hibernate.cfg.xml代码

    
        com.mysql.jdbc.Driver
        lcy2350738
        jdbc:mysql://localhost:3306/userdb
        root
        org.hibernate.dialect.MySQLDialect
        true
        false