hql Hibernate.gethibernatetemplate()
1. find(String hql); ?//普通查詢
???示例：this.gethibernateTemplate().find("from User");
?
2. find(String hql,Object value);//一個查詢條件
???示例：this.gethibernateTemplate().find("from User u where u.name=?","test");
?
3. find(String hql,Object[] values);// 多個查詢條件
???示例：this.gethibernateTemplate().find("from User u where u.name=? and u.pwd=?",new String[]{"test","123"});
4. findByExample(Object exampleEntity,int firstResult, int maxResults)//分頁使用
???示例：
???User user= new User(); u.setActive("Active");
???List list=this.getHibernateTemplate().findByExample(user,firstResult,maxResults); ?
???查詢結果：狀態為Active的用戶（對象從0到20 計數） ?
?
5. findByNamedParam(String hql,String paramName,Object value); //一個查詢條件
???示例：
???hql="from User u where u.name=:parName ";
???paramName= "parName";
???value="bb"
???List list = this.getHibernateTemplate.findByNamedParam(hql,paramName,value);
???查詢結果：姓名為bb的用戶
?
6. findByNamedParam(String queryString , String[] paramName , Object[] value) //多個查詢條件
???示例：
???hql="from User u where u.name=:myname and u.pwd =:mypwd ";
???String[] paramName= new String[]{"myname","mypwd"};
???Sring[] value=new Strign[]{"bb","123"};
???List list = this.getHibernateTemplate.findByNamedParam(hql,paramName,value);
???查詢結果：姓名為bb密碼為123的用戶
?
7.分頁HQL示例
???public List excuteHqlPage(final String hqlStr, final int startRow,final int rowCount) throws DaoException {
???List<Object[]> list;
???try {
???????list = getHibernateTemplate().executeFind(new HibernateCallback() {
???????public Object doInHibernate(Session session)
???????throws HibernateException, SQLException {
???????org.hibernate.Query query = (org.hibernate.Query) session.createQuery(hqlStr);
???????query.setFirstResult(startRow);// 定義從第幾條開始查詢
???????query.setMaxResults(rowCount);// 定義返回的記錄數
???????List list = query.list();
???????return list;
?????}
????});
???} catch (Exception e) {
???throw new DaoException(DaoException.ERRORCODE_EXCUTEHQL);
???}
return list;
}
?
8. 根據HQL/SQL 查詢
???public List queryByHql(final String hql, final Object[] prams,final String sql) {
?????return (List) ?getHibernateTemplate().execute(new HibernateCallback(){
???????public Object doInHibernate(Session session)
?????????throws HibernateException, SQLException {
????????????if(hql!=null && hql.length()>0){
???????????Query query=session.createQuery(hql);
???????????if(prams!=null && prams.length>0){
???????????for(int i=0;i<prams.length;i++){
???????????query.setParameter(i,prams[i]);
?????????}
??????}
?????return query.list();
???}else{
???SQLQuery sqlquery=session.createSQLQuery(sql);
???return sqlquery.list();
?}
}
});
}
?
9. 保存/更新
???public String saveOrUpdateObject(ISuperVO vo) throws DaoException {
?????try {
?????????String id = null;
?????????if (StringUtil.isEmpty(vo.getPid())) {
????????????getHibernateTemplate().save(vo);
????????} else {
???????????getHibernateTemplate().merge(vo);
???????}
????????id = vo.getPid();
????????return id;
?????} catch (Exception e) {
??????????e.printStackTrace();
}
}
?
10. getHibernateTemplate().delete(vo); ?//刪除
?
11. 根據條件刪除
???public Integer deleteObjectsByWherePart(final Class voClass,final String wherePart, final Object[] parmaters)throws DaoException {
???try {
??????Integer count = (Integer) getHibernateTemplate().execute( new HibernateCallback() {
?????public Object doInHibernate(Session session)throws HibernateException, SQLException {
?????Integer coun = null;
?????String hql = "delete from " + voClass.getName()+ " where 1=1 ";
?????if (wherePart != null && wherePart.trim().length() > 0) {
?????????hql = hql + " and " + wherePart;
?????}
?????Query query = session.createQuery(hql);
?????Object obj = null;
?????if (parmaters != null && parmaters.length > 0) {
?????????for (int i = 0; i < parmaters.length; i++) {
????????????obj = parmaters[i];
???????????query.setParameter(i, obj);
????????}
??????}
?????coun = query.executeUpdate();
?????return coun;
????}
???});
???return count;
??} catch (Exception e) {
??e.printStackTrace();
}
}
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