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com.ims.persistence.base; import java.io.Serializable;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.hibernate.Criteria;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Projections;
import org.hibernate.jdbc.Work;
public> private SessionFactory sessionFactory;
public BaseDaoImpl(){
super();
}
public SessionFactory getSessionFactory() {
return sessionFactory;
}
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
/**
* 返回数据库session对象
* @return
*/
protected Session getSession(){
return sessionFactory.getCurrentSession();
}
/**
* 保存实体对象
* @param entity 实体对象
*/
@Override
public void save(T entity){
Session session = getSession();
session.save(entity);
session.flush();
session.evict(entity);
}
/**
* 更新实体对象
* @param 实体对象
*/
@Override
public void update(T entity){
Session session = getSession();
session.update(entity);
session.flush();
session.evict(entity);
}
/**
* 保存或更新实体对象
* @param entity 实体对象
*/
@Override
public void saveOrUpdate(T entity) {
Session session = getSession();
session.saveOrUpdate(entity);
session.flush();
session.evict(entity);
}
/**
* 删除实体对象
* @param entity 实体对象
*/
@Override
public void delete(T entity){
Session session = getSession();
session.delete(entity);
session.flush();
session.evict(entity);
}
/**
* 查询hql语句,返回唯一结果
* @param hql
*/
@Override
public Object findUniqueResult(String hql){
Query query = getSession().createQuery(hql);
return query.uniqueResult();
}
/**
* 执行sql语句,更新数据库
* @param sql
*/
@Override
public void updateBySql(final String sql){
getSession().doWork(new Work() {
@Override
public void execute(Connection connection) throws SQLException {
connection.prepareStatement(sql).executeUpdate();
}
});
}
/**
* 通过Criteria对象查询,返回实体对象结果集
* @param detachedCriteria 离线的Criteria对象
* @return 实体对象结果集
*/
@Override
public List findByCriteria(DetachedCriteria detachedCriteria){
Criteria criteria = detachedCriteria.getExecutableCriteria(getSession());
List records = criteria.list();
return records;
}
/**
* 通过sql语句查询,返回map对象结果集
* @param sql
* @return map对象结果集
*/
@Override
public List<Map<String, Object>> findBySql(final String sql){
final List<Map<String, Object>> result = new ArrayList<Map<String, Object>>();
getSession().doWork(new Work() {
@Override
public void execute(Connection connection) throws SQLException {
ResultSet rs = connection.prepareStatement(sql).executeQuery();
result.addAll(RsHelper.rSToList(rs));
}
});
return result;
}
/**
* 查询sql语句,返回唯一结果
* @param sql
*/
@Override
public Object findUniqueResultBySql(String sql) {
return getSession().createSQLQuery(sql.toString()).uniqueResult();
}
/**
* 通过Criteria对象查询,返回结果集的记录数
* @param detachedCriteria 离线的Criteria对象
* @return 结果集的记录数
*/
@Override
public long getCount(DetachedCriteria detachedCriteria) {
Criteria criteria = detachedCriteria.getExecutableCriteria(getSession());
Object object = criteria.setProjection(Projections.rowCount()).uniqueResult();
criteria.setProjection(null);
Long totalRow = Long.valueOf(String.valueOf(object));
return totalRow;
}
/**
* 通过Criteria对象进行分页查询,返回实体对象结果集
* @param pageNum 第几页
* @param pageSize 每页大小
* @param detachedCriteria 离线的Criteria对象
* @return 实体对象结果集
*/
@Override
public List<T> findPage(int pageNum, int pageSize,
DetachedCriteria detachedCriteria){
Criteria criteria = detachedCriteria.getExecutableCriteria(getSession());
List<T> records = criteria.setFirstResult((pageNum-1) * pageSize).setMaxResults(pageSize).list();
return records;
}
/**
* 通过sql语句,进行分页查询,返回分页对象
* @param pageNum 第几页
* @param pageSize 每页大小
* @param sql
* @return 分页对象
*/
@Override
public Pagination findPage(final int pageNum, final int pageSize,final String sql){
final Pagination page = new Pagination();
getSession().doWork(new Work() {
@Override
public void execute(Connection connection) throws SQLException {
String countSql = MessageFormat.format("select count(*) from ({0}) page", sql);
ResultSet rs = connection.prepareStatement(countSql).executeQuery();
page.setTotal(Long.valueOf(RsHelper.getUniqueResult(rs).toString()));
long firstResult = (pageNum - 1)*pageSize;
String selectSql = MessageFormat.format("select * from ({0}) page limit {1},{2}", sql, firstResult, firstResult+pageSize);
page.setRows(RsHelper.rSToList(connection.prepareStatement(selectSql).executeQuery()));
}
});
return page;
}
/**
* 调用存储过程,返回单结果集
* @param proceName 存储过程名称
* @param params 输入参数集合
* @return map对象结果集
*/
public List<Map<String, Object>> callProcedure(String proceName, final List<Object> params){
final List<Map<String, Object>> result = new ArrayList<Map<String, Object>>();
final StringBuffer sql = new StringBuffer();
sql.append("{call " + proceName + "(");
for(int i=0; params!=null && i<params.size(); i++){
sql.append("?");
if(i+1!=params.size())
sql.append(",");
}
sql.append(")}");
getSession().doWork(new Work() {
@Override
public void execute(Connection connection) throws SQLException {
CallableStatement statement = connection.prepareCall(
sql.toString());
for(int i=0; i<params.size(); i++){
statement.setObject(i+1, params.get(i));//设置参数
}
result.addAll(RsHelper.rSToList(statement.executeQuery()));
}
});
return result;
}
} |
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