001import java.io.*;002import java.sql.SQLException;003import java.util.ArrayList;004import java.util.List;005 006import org.hibernate.Hibernate;007import org.hibernate.HibernateException;008import org.hibernate.Query;009import org.hibernate.SQLQuery;010import org.hibernate.Session;011import org.hibernate.Transaction;012import org.hibernate.type.Type;013import org.springframework.orm.hibernate3.HibernateCallback;014import org.springframework.orm.hibernate3.support.HibernateDaoSupport;015 016public class GenericDao extends HibernateDaoSupport{017 private ThreadLocal<Session> sessions = new ThreadLocal<Session>();018 private ThreadLocal<Transaction> transactions = new ThreadLocal<Transaction>();019 public synchronized Session getMySession(){020 Session session = sessions.get();021 if(session==null){022 session = getSession();023 transactions.set(session.beginTransaction());024 sessions.set(session);025 }else026 if(!session.isOpen()){027 session = getSession();028 transactions.set(session.beginTransaction());029 sessions.set(session);030 }031 return session;032 }033 public synchronized void commitMySession(){034 Session session = sessions.get();035 if(session!=null&&session.isOpen()){036 transactions.get().commit();037 session.close();038 }039 transactions.remove();040 sessions.remove();041 }042 public synchronized void rollbackMySession(){043 Session session = sessions.get();044 if(session!=null&&session.isOpen()){045 transactions.get().rollback();046 session.close();047 }048 transactions.remove();049 sessions.remove();050 }051 public <T> T get(Class<T> clazz, Serializable id){052 return (T)getHibernateTemplate().get(clazz, id);053 }054 public <T> T load(Class<T> clazz, Serializable id){055 return (T)getHibernateTemplate().load(clazz, id);056 }057 public <T> void save(T entity){058// System.out.println("---->gdao.save("+entity.getClass().getName()+")----");059 getHibernateTemplate().save(entity);060 }061 public <T> void update(T entity){062 getHibernateTemplate().update(entity);063 }064 public <T> void delete(T entity){065 getHibernateTemplate().delete(entity);066 }067 068 public int execUpdateSQL(String sql, Serializable...values){069 Session sess = getMySession();070 SQLQuery query = sess.createSQLQuery(sql);071 if(values!=null&&values.length>0){072 for(int i=0; i<values.length; i++){073 query.setParameter(i, values[i]);074 }075 }076 return query.executeUpdate();077 }078 public Long getFirstLong(String sql, final Serializable... values) throws Exception{079 List<String> params = new ArrayList<String>(1);080 List<Type> types = new ArrayList<Type>(1);081 params.add("c"); types.add(Hibernate.INTEGER);082 Object obj = findUnique(sql, params, types, values);083 if(obj==null){084 return -1L;085 }086 if(obj instanceof Object[]){087 obj = ((Object[])obj)[0];088 }089 if(obj instanceof Number){090 return ((Number)obj).longValue();091 }092 return -1L;093 }094// public Long getFirstLong(String sql, List<String>params, List<Type>types) throws Exception{095// Object[] obj = findUnique(sql, params, types);096// if(obj==null||obj.length==0){097// return -1L;098// }099// Object object = obj[0];100// if(object instanceof Number){101// return ((Number)object).longValue();102// }103// return -1L;104// }105 public List<?> find(String hql){106 return getHibernateTemplate().find(hql);107 }108// public List<?> find(String hql, final Object...values){109// logger.info(hql);110// return getHibernateTemplate().find(hql, values);111// }112 113 public <T> List<T> findByPage(Class<T> clazz, final int start, final int limit, final String where, final Serializable... values){114 String hql = "from " + clazz.getName() + " as e";115 if(where!=null&&where.length()>0){116 hql += " where " + where;117 }118 final String fHql = hql;119 return getHibernateTemplate().executeFind(new HibernateCallback(){120 121 public Object doInHibernate(Session session)122 throws HibernateException, SQLException {123 Query q = session.createQuery(fHql);124 if(values!=null&&values.length>0){125 for(int i=0; i<values.length; i++){126 q.setParameter(i, values[i]);127 }128 }129 q.setFirstResult(start).setMaxResults(limit);130 return q.list();131 }132 133 });134 }135 public <T> List<T> find(Class<T> clazz, final String where, final Serializable... values){136 String hql = "from " + clazz.getSimpleName()+" as e";137 if(where!=null&&where.length()>0){138 hql += " where " + where;139 }140 return getHibernateTemplate().find(hql, values);141 }142 public long getTotalCountByHql(Class<?> clazz, final String where, final Serializable... values) throws Exception {143 String hql = "select count(*) from " + clazz.getSimpleName()+" as e";144 if(where!=null&&where.length()>0){145 hql += " where " + where;146 }147 List<Number> cs = getHibernateTemplate().find(hql, values);148 if(cs!=null&&cs.size()>0){149 Number n = cs.get(0);150 return n.longValue();151 }152 return 0;153 }154 public long getTotalCount(Class<?> clazz, final String where, final Serializable... values) throws Exception {155 String sql = "select count(1) as c from " + clazz.getSimpleName() + " e";156 if(where!=null&&where.length()>0){157 sql += " where " + where;158 }159 return getFirstLong(sql, values);160 }161 162 public long getTotalCount(String sql, final Serializable... values) throws Exception {163 return getFirstLong(sql, values).longValue();164 }165 public Object[] findUnique(final String sql, List<String>params, List<Type>types, final Serializable...values) {166 Session sess = getMySession();167 logger.debug("------findUnique.getSession()! sess="+sess.hashCode());168 SQLQuery query = sess.createSQLQuery(sql);169 for(int j=0; j<params.size(); j++){170 query.addScalar(params.get(j), types.get(j));171 }172 if(values!=null&&values.length>0){173 for(int i=0; i<values.length; i++){174 query.setParameter(i, values[i]);175 }176 }177 query.setMaxResults(1);178 List<?> list = query.list();179 if(list==null||list.size()==0){180 return null;181 }182 Object obj = list.get(0);183 if(obj==null){184 return null;185 }186 logger.debug("obj.type="+obj.getClass().getName());187 if(!obj.getClass().isArray()){//如果返回值不是数组，则要进行相关的处理188 if(obj instanceof Number){189 if(obj instanceof Long){190 return new Long[]{(Long)(obj)};191 }192 if(obj instanceof Integer){193 return new Long[]{new Long((Integer)obj)};194 }195 return new Number[]{(Number)obj};196 }197 return new Object[]{obj};198 }199 return (Object[])obj;200 }201 public List<Object[]> find(final String sql, List<String>params, List<Type>types, final Serializable... values) {202 Session sess = getMySession();203 logger.debug("------find.getSession()! sess="+sess.hashCode());204 SQLQuery query = sess.createSQLQuery(sql);205 206 for(int j=0; j<params.size(); j++){207 query.addScalar(params.get(j), types.get(j));208 }209 if(values!=null&&values.length>0){210 for(int i=0; i<values.length; i++){211 query.setParameter(i, values[i]);212 }213 }214 return query.list();215 }216 public long getNextId(String sequence) throws Exception{217 String sql = "select "+sequence+".nextval as nextid from dual";218 219 Session sess = getMySession();220 logger.debug("------generateId.getSession()! sess="+sess.hashCode());221 SQLQuery query = sess.createSQLQuery(sql);222 query.addScalar("nextid", Hibernate.LONG);223 List<?> list = query.list();224 if(list==null||list.size()==0){225 return -1L;226 }227 Object obj = list.get(0);228 logger.debug("obj.type="+obj.getClass().getName());229 if(obj instanceof Number){230 return ((Number)obj).longValue();231 }232 return -1L;233 }234 public boolean exists(String sql, final Object...values) throws Exception{235 Session sess = getMySession();236 logger.debug("------exists.getSession()! sess="+sess.hashCode());237 SQLQuery query = sess.createSQLQuery(sql);238 for(int i=0; i<values.length; i++){239 query.setParameter(i, values[i]);240 }241 List<?> list = query.list();242 if(list==null||list.size()==0){243 return false;244 }245 return true;246 }247 248}
