hql Hibernate.gethibernatetemplate()

1. find(String hql);  //普通查询

示例：this.gethibernateTemplate().find("from User");

2. find(String hql,Object value);//一个查询条件

示例：this.gethibernateTemplate().find("from User u where u.name=?","test");

3. find(String hql,Object[] values);// 多个查询条件

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)//分页使用

示例：

User user= new User(); u.setActive("Active");

List list=this.getHibernateTemplate().findByExample(user,firstResult,maxResults);

查询结果：状态为Active的用户（对象从0到20 计数）

5. findByNamedParam(String hql,String paramName,Object value); //一个查询条件

示例：

hql="from User u where u.name=:parName ";

paramName= "parName";

value="bb"

List list = this.getHibernateTemplate.findByNamedParam(hql,paramName,value);

查询结果：姓名为bb的用户

6. findByNamedParam(String queryString , String[] paramName , Object[] value) //多个查询条件

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);

查询结果：姓名为bb密码为123的用户

7.分页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);// 定义从第几条开始查询

query.setMaxResults(rowCount);// 定义返回的记录数

List list = query.list();

return list;

}

});

} catch (Exception e) {

throw new DaoException(DaoException.ERRORCODE_EXCUTEHQL);

}

return list;

}

8. 根据HQL/SQL 查询

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);  //删除

11. 根据条件删除

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();

}

}