你不能这样做，当抛出异常，抛出真实的 ExpectedException 规则。

You cannot do that, when the exception is thrown it's thrown for real, ExpectedException rule or not.

如果你真的想要这种行为，你可以回到旧学校模式：

If you really want this kind of behaviour, you can go back to the "old school" pattern:

try {
    userService.createUser("toto1");
    Assert.fail("expecting some AlreadyExistsException here")
} catch (AlreadyExistsException e) {
    // ignore
}

log.info("3");

但我不会费心去做一些日志。

But I wouldn't bother for some log.