[Hibernate] - Interceptors and events

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Hibernate的攔截器，有很大作用。比如要監控SQL的執行效率等。

參考文檔：

http://docs.jboss.org/hibernate/orm/3.5/reference/zh-CN/html/events.html

 

下面是一個簡單的監控Hibernate的操作SQL列印：

建立一個Java類：

package com.my.dao.util;import org.hibernate.EmptyInterceptor;@SuppressWarnings("serial")public class AuditInterceptor extends EmptyInterceptor {    @Override    public String onPrepareStatement(String sql) {        System.out.println(sql);        return super.onPrepareStatement(sql);    }    }

在Hibernate的Configuration中加入這句：

configuration.setInterceptor(new AuditInterceptor());

完整HibernateUtil

package com.my.dao.util;import org.hibernate.SessionFactory;import org.hibernate.boot.registry.StandardServiceRegistryBuilder;import org.hibernate.cfg.Configuration;public class HibernateUtil {    private static final SessionFactory sessionFactory = buildSessionFactory();    private static SessionFactory buildSessionFactory() {        try {            // Create the SessionFactory from hibernate.cfg.xml            Configuration configuration = new Configuration();            configuration.setInterceptor(new AuditInterceptor());            return configuration.configure().buildSessionFactory(                    new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build());        } 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 SessionFactory getSessionFactory() {        return sessionFactory;    }    }

 

[Hibernate] - Interceptors and events