Date

Date date = new Date(); //獲取日期對象   如果Date顯示Date cannot be resolved to a type 則說明缺少包，需要在page裏面添加import="java.util.*" 如果文章開頭<@有紅色波浪線，並且顯示The superclass "javax.servlet.http.HttpServlet" was not found on

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