java LocalDateTime 30分整点

要获取Java LocalDateTime的30分整点，可以使用LocalDateTime的withMinute()方法。你可以先获取当前的LocalDateTime实例，然后使用withMinute()方法将分钟设置为30。下面是一个示例代码：

LocalDateTime now = LocalDateTime.now();
LocalDateTime thirtyMinutes = now.withMinute(30);

这样，变量thirtyMinutes将包含当前时间的30分整点的LocalDateTime实例。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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