Java : How to add date in to mysql database and get back

Question

我需要将当前日期 +7 天添加到我的 SQL 数据库中并将其检索回来，我该怎么做？

Calendar cal = Calendar.getInstance();
                        cal.add(Calendar.DATE, 7); // add 7 days  
                        int date = cal.get(Calendar.DATE);
                        int month = cal.get(Calendar.MONTH);
                        int year = cal.get(Calendar.YEAR);
                        String newdate = Integer.toString(date);
                        String concat = newdate.concat("-" + Integer.toString(cal.get(Calendar.MONTH)) + "-" + Integer.toString(cal.get(Calendar.YEAR)));

我找到了这段代码

java.util.Date newDate = new Date(result.getDate("VALUEDATE").getTime());

Answer 1

您可以直接在 MySQL 中执行此操作

update your_table
set date_column = date_column + interval 7 day

Doc