A Hibernate util written by groovy-优快云博客

本文介绍了一个使用Groovy语言实现的Hibernate集成示例，展示了如何配置Hibernate并执行常见的数据库操作，如保存、更新、查询和删除记录。

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Hibernate.groovy

import org.hibernate.cfg.Configuration
import org.hibernate.Session
import org.hibernate.SessionFactory
import org.hibernate.Transaction
import org.hibernate.tool.hbm2ddl.SchemaUpdate

class Hibernate {
    def static sessionFactory
    static {
        try {
            Configuration cfg = new Configuration()
            cfg.configure()
            new SchemaUpdate(cfg).execute( true , true )
            sessionFactory = cfg.buildSessionFactory()
        } catch (Exception e) {
            e.printStackTrace()
        }
    }

    Hibernate() {}

     private Session getSession() {
         return sessionFactory.openSession()
    }

    Object execute(closure) {
        def s = getSession()
            def tr = null
            def result = null
             try {
                tr = s.beginTransaction()
                    result = closure.call(s)
                    tr.commit()
            } catch (Exception e) {
                e.printStackTrace()
                     if (tr != null ) {
                        tr.rollback()
                    }
            } finally {
                s.close()
            }
         return result
    }

     void saveOrUpdate(obj) {
        def saveClosure = { s -> s.saveOrUpdate(obj) }
        execute(saveClosure)
    }

    List executeQuery(hql) {
        execute({ s -> s.createQuery(hql).list() })
    }

    List executeQuery(hql, parameters) {
        def query = { s ->
            def q = s.createQuery(hql)
                 if (parameters != null ) {
                     for (i in 0 ..parameters.size() - 1 ) {
                        q.setParameter(i, parameters[i])
                    }
                }
            q.list()
        }
        execute(query)
    }

    def get(clazz, id) {
         return execute({ s -> s.get(clazz, id) })
    }

     void delete(obj) {
        execute({ s -> s.delete(obj) })
    }
}

Instead of interface, I use Closure for callback

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Tags: hibernategroovy