DateUtil.dayOfWeek不准
时间: 2023-10-20 17:29:39 浏览: 245
DateUtil.dayOfWeek不准是因为在java.util.Date类中,星期的表示是从1开始的,而在DateUtil类中,星期的表示是从0开始的。这就导致了在使用DateUtil.dayOfWeek方法时,得到的结果与实际日期的星期不一致。所以在使用DateUtil.dayOfWeek方法时,需要注意将结果加1来得到正确的星期。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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- *1* *2* *3* [「Java深层系列」让我们一起完全吃透时间和日期相关的API指南](https://blog.csdn.net/weixin_64314555/article/details/121593206)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 100%"]
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相关问题
DateUtil.dayOfWeek
DateUtil.dayOfWeek是一个方法,它接受一个日期对象,并返回该日期是星期几的数字表示,其中1表示周日,2表示周一,以此类推。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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- *2* *3* [传递的日期转成周几,星期几~代码超短超简单](https://blog.csdn.net/qq_45502336/article/details/128904905)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
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翻译这行代码: df['dayofweek'] = df.index.dayofweek
这是一行Python代码,它的作用是将DataFrame数据集df的索引值中的星期几信息提取出来,并将其作为一个新的列加入到df数据集中,列名为'dayofweek'。具体而言,df.index.dayofweek表示获取df数据集索引值中每个日期对应的星期几信息,然后将这些星期几信息作为新的一列添加到df数据集中,赋值给df['dayofweek']列。
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