Question

我正在运行一个Spring MVC项目，并希望有一个表单按钮，将所有数据重置为新的Tomcat启动。我们使用Hibernate和import.sql脚本在dev环境中启动时填充一些虚拟数据。我正在寻找一种解决方案，实例只需点击一个按钮即可返回此状态（基本上是create的Hibernate ddl-auto加上import.sql的导入。这当然不会在生产中运行。

我也愿意将import.sql的内容翻译成程序化（基于Java配置）的解决方案，如果这样做更容易。

这个问题可能已经有了答案，但我还没有找到答案。如果它重复，将关闭它。

Answer 1

此SO question与您需要做的非常相似。

点击按钮，你需要做的就是这样。

    Connection conn = (Connection) DriverManager.getConnection("jdbc:mysql://localhost/?user=user&password=pass");
    Statement statement = (Statement) conn.createStatement();
    statement.executeUpdate("DROP DATABASE tcs;");
    statement.executeUpdate("CREATE DATABASE tcs charset=utf8 collate=utf8_persian_ci;");

然后你需要调用hibernate提供的buildSessionFactory方法来重新创建表。

我希望它有所帮助。

Answer 2

为什么不使用相同的jdbcurl创建一个使用“create-drop”配置的新SessionFactory，然后在完成后，加载并执行import.sql脚本的内容？

@Test
public void test() {
    HsqlSessionFactoryCreator creator = HsqlSessionFactoryCreator.getInstance();
    try (SessionFactory sessionFactory1 = creator.create()) {
        try (Session session = sessionFactory1.openSession()) {
            Transaction transaction = session.beginTransaction();
            try {
                createEntity(...);

                transaction.commit();
            } catch (Throwable throwable) {
                transaction.rollback();
            }
        }

        try (Session session = sessionFactory1.openSession()) {
            System.err.println("SessionFactory1 " + session.createCriteria(MyEntity.class).list());
        }

        try (Session session = sessionFactory1.openSession()) {
            Transaction transaction = session.beginTransaction();
            try {
                createEntity(...);

                transaction.commit();
            } catch (Throwable throwable) {
                transaction.rollback();
            }
        }

        try (Session session = sessionFactory1.openSession()) {
            System.err.println("SessionFactory1 " + session.createCriteria(MyEntity.class).list());
        }

        try (SessionFactory sessionFactory2 = creator.create()) {
            try (Session session = sessionFactory1.openSession()) {
                System.err.println("SessionFactory1 after creating SessionFactory2 " + session.createCriteria(MyEntity.class).list());
            }
            try (Session session = sessionFactory2.openSession()) {
                System.err.println("SessionFactory2 " + session.createCriteria(MyEntity.class).list());
            }
            try (Session session = sessionFactory1.openSession()) {
                Transaction transaction = session.beginTransaction();
                try {
                    createEntity(...);

                    transaction.commit();
                } catch (Throwable throwable) {
                    transaction.rollback();
                }
            }
            try (Session session = sessionFactory1.openSession()) {
                System.err.println("SessionFactory1 " + session.createCriteria(MyEntity.class).list());
            }
            try (Session session = sessionFactory2.openSession()) {
                System.err.println("SessionFactory2 " + session.createCriteria(MyEntity.class).list());
            }
        }
    }
}

当我运行测试时（创建了一个具有实体知识的SessionFactory），我得到以下输出

SessionFactory1 [MyEntity[ID 9c81b1fa-04f5-4572-a945-e16d13ffc187]]
SessionFactory1 [MyEntity[ID 550e7c5d-6c8c-40ea-8f4b-cfdbf2d92075], MyEntity[ID 9c81b1fa-04f5-4572-a945-e16d13ffc187]]
SessionFactory1 after creating SessionFactory2 []
SessionFactory2 []
SessionFactory1 [MyEntity[ID 3748127d-6872-4d9c-84fb-1d83b85c9fe0]]
SessionFactory2 [MyEntity[ID 3748127d-6872-4d9c-84fb-1d83b85c9fe0]]

如何重置Spring / Tomcat项目的所有数据？

2 个答案: