java - 刷新模式 hibernate 实用程序

Question

我尝试了解不同 hibernate FlushMode之间的区别。为此，我创建了一个插入的小示例。

    session.beginTransaction();
    session.setFlushMode(FlushMode.AUTO);// I tried ALWAYS AND MANUAL
    for (int i = 1; i < 4; i++) {
        Stock stock = new Stock();
        stock.setStockId(i);
        stock.setStockCode("code-"+i);
        stock.setStockName("name-"+i);

        session.save(stock);
        System.out.println("entity saved");
    }

    session.getTransaction().commit();

问题是我总是有与flushMode 设置为COMMIT 相同的行为。

entity saved
entity saved
entity saved
insert into stock (STOCK_CODE, STOCK_NAME, STOCK_ID) values (?, ?, ?)
insert into stock (STOCK_CODE, STOCK_NAME, STOCK_ID) values (?, ?, ?)
insert into stock (STOCK_CODE, STOCK_NAME, STOCK_ID) values (?, ?, ?)

当我期待着

entity saved
insert into stock (STOCK_CODE, STOCK_NAME, STOCK_ID) values (?, ?, ?)
entity saved
insert into stock (STOCK_CODE, STOCK_NAME, STOCK_ID) values (?, ?, ?)
entity saved
insert into stock (STOCK_CODE, STOCK_NAME, STOCK_ID) values (?, ?, ?)

有人能解释为什么我总是得到相同的结果吗？

Answer 1

FlushMode.COMMIT 的文档:当调用 Transaction#commit 时， session 将被刷新。

如果您在循环内提​​交事务，结果应该是您期望的结果。

问候慢