路过的，帮忙看下hibernate查询_J2EE

路过的大虾，帮忙看下hibernate查询

Java code

/** Find all events in the given month and year.* @param month - 0-11 (0 = January)* @param year*/  public List findEventsFor(int month, int year) {  List events = null;      try {      startOperation();      Date firstDay = DateUtils.newDate(month, 1, year);      Date lastDay = DateUtils.newDate(month + 1, 1, year);          StringBuffer sql = new StringBuffer();      sql.append("from Event event where 1=1 and event.startDate >= :firstDay and event.startDate < :lastDay");      Query query = getSession().createQuery(sql.toString());      query.setParameter("firstDay", firstDay);      query.setParameter("lastDay", lastDay);      events =  query.list();      getTx().commit();  } catch (HibernateException e) {      handleException(e);  } finally {      HibernateFactory.close(getSession());  }  return events;}

如果在创建Query对象之后，在追加sql会有问题？
parameter username does not exist as a named parameter in
原因也很简单，对象创建完成之后再追加的sqlhibernate是不知道的，此种问题有遇到过的吗？麻烦给出解决方案，谢！

Java code

StringBuffer sql = new StringBuffer();sql.append("from Event event where 1=1 ");Query query = getSession().createQuery(q);if(null != startData && null != lastDay) {   sql.append("and event.startDate >= :firstDay and event.startDate < :lastDay");}query.setParameter("firstDay", firstDay);query.setParameter("lastDay", lastDay);

------解决方案--------------------
你必须要用query吗，不是必须的话，可以用别的方法如:
StringBuffer sql = new StringBuffer();
sql.append("from Event event where 1=1 and event.startDate >= ? and event.startDate < ?);

List list = this.getHibernateTemplate().find(queryString, new Object[]{firstDay,lastDay});
不知道行不，可以试一下
------解决方案--------------------

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你必须要用query吗，不是必须的话，可以用别的方法如:
StringBuffer sql = new StringBuffer();
sql.append("from Event event where 1=1 and event.startDate >= ? and event.startDate < ?);

List list = this.getHibernateT……