mybatisplus时间范围查询
mybatisplus,时间范围查询的两种方式。下面以查询当天的数据为例。(备注:?表示具体的实体类)
一、between()
LambdaQueryWrapper<?> lq = Wrappers.lambdaQuery(); Date start = DateUtil.strToDateLong(DateUtil.dateToStr(new Date(), Locale.CHINA) + " 00:00:00"); Date end = DateUtil.strToDateLong(DateUtil.dateToStr(new Date(), Locale.CHINA) + " 23:59:59"); lq.between(?::getCreateTime, start, end);
引用的时间类:
import java.text.DateFormat; import java.text.ParsePosition; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.Locale; public class DateUtil { public static ThreadLocal<DateFormat> chinaDateSDF = new ThreadLocal<DateFormat>() { @Override protected DateFormat initialValue() { SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd", Locale.CHINA); return df; } }; /** * 获取日期yyyy-MM-dd格式字符串 * * @param date * @param locale * @return */ public static String dateToStr(Date date, Locale locale) { if (locale == null) { } return chinaDateSDF.get().format(date); } /** * 将长时间格式字符串转换为时间 yyyy-MM-dd HH:mm:ss * * @param strDate * @return */ public static Date strToDateLong(String strDate) { SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); ParsePosition pos = new ParsePosition(0); Date strtodate = formatter.parse(strDate, pos); return strtodate; } }
二、结合ge()和le()
LambdaQueryWrapper<?> lambdaQueryWrapper = Wrappers.lambdaQuery(); Calendar start = Calendar.getInstance(); Calendar end = Calendar.getInstance(); start.add(Calendar.DATE,-1); // 时 start.set(Calendar.HOUR_OF_DAY, 0); // 分 start.set(Calendar.MINUTE, 0); // 秒 start.set(Calendar.SECOND, 0); String startDate = simpleDateFormat.format(start.getTime()); // 时 end.set(Calendar.HOUR_OF_DAY, 0); // 分 end.set(Calendar.MINUTE, 0); // 秒 end.set(Calendar.SECOND, 0); String endDate = simpleDateFormat.format(end.getTime()); lambdaQueryWrapper.ge(?::getCreateTime,startDate).le(?::getCreateTime,endDate);