我已经阅读了Java Persistence 2.0中的文章Locking and Concurrency,并运行了示例应用程序.但我仍然无法意识到PESSIMISTIC_READ和PESSIMISTIC_WRITE之间的区别.我试图修改代码,并且使用PESSIMISTIC_READ和PESSIMISTIC_WRITE的代码将具有与"for update"调用sql相同的结果.
java jpa locking pessimistic
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