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| Hibernate工具 |
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/////////////////////////////////////////////////////////////////////////
package util;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtil {
public static final SessionFactory sessionFactory;
static {
try {
// Create the SessionFactory from hibernate.cfg.xml
Configuration config = new Configuration().configure();
sessionFactory = config.buildSessionFactory();
} catch (Throwable ex) {
// Make sure you log the exception, as it might be swallowed
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static final ThreadLocal session = new ThreadLocal();
public static Session currentSession() throws HibernateException {
Session s = (Session) session.get();
// Open a new Session, if this thread has none yet
if (s == null) {
s = sessionFactory.openSession();
// Store it in the ThreadLocal variable
session.set(s);
}
return s;
}
public static void closeSession() throws HibernateException {
Session s = (Session) session.get();
if (s != null)
s.close();
session.set(null);
}
}
/////////////////////////////////////////////////////////////////////////
package util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;
/**
* @author joeyin
*
*/
public class ConnectionUtil {
static Connection conn = null;
private static Statement st = null;
public static void openConnection() {
try {
Class.forName("org.hsqldb.jdbcDriver");
System.out.println("Driver Loaded.");
conn = DriverManager.getConnection("jdbc:hsqldb:mem:testdb", "sa", "");
System.out.println("Got Connection.");
st = conn.createStatement();
} catch (Exception e) {
System.err.println("Got an exception! ");
System.err.println(e.getMessage());
e.printStackTrace();
System.exit(0);
}
}
public static String[] select(String sql) {
ArrayList data = new ArrayList();
try {
ResultSet rs = st.executeQuery(sql);
while (rs.next()) {
data.add(rs.getString(1));
}
} catch (Exception e) {
System.out.println(sql);
e.printStackTrace();
}
if (data.size() == 0) {
return new String[0];
}
return (String[]) data.toArray(new String[data.size()]);
}
public static void update(String sql) {
try {
st.executeUpdate(sql);
} catch (Exception e) {
e.printStackTrace();
System.out.println(sql);
// System.exit(0);
}
}
public static void closeConnection() {
try {
conn.close();
System.out.println("Connection closed.");
} catch (Exception e) {
e.printStackTrace();
}
}
}
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 Hibernate-Util.zip( 4,576 k) |
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