java自定义类中，基本的增删改查代码

public void save(AnswerInfo transientInstance) {
log.debug("saving AnswerInfo instance");
try {
getHibernateTemplate().save(transientInstance);
log.debug("save successful");
} catch (RuntimeException re) {
log.error("save failed", re);
throw re;
}
}

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

public AnswerInfo findById(java.lang.Integer id) {
log.debug("getting AnswerInfo instance with id: " + id);
try {
AnswerInfo instance = (AnswerInfo) getHibernateTemplate().get(
"com.wj.po.AnswerInfo", id);
ret