使用函數apply(boolean condition, String applySql, Object... value),拼接sql
// 創建查詢構造器
QueryWrapper<Trade> tradeQueryWrapper = new QueryWrapper<>();
// 判斷startTime是否為空,定義好參數的位置防止sql注入 tradeQueryWrapper.apply(StringUtils.isNotEmpty(startTime), "date_format (order_date,'%Y-%m-%d') >= date_format('" + startTime + "','%Y-%m-%d')"); tradeQueryWrapper.apply(StringUtils.isNotEmpty(endTime), "date_format (order_date,'%Y-%m-%d') <= date_format('" + endTime + "','%Y-%m-%d')");