2018年4月19日
MySQL 相邻两条数据相减
摘要： SELECT B.MEN_ID,TIMESTAMPDIFF(DAY,B.PRE_DATE,B.CURR_DATE) AS DAYS FROM ( SELECT A.MEN_ID,A.ORDER_DATE AS CURR_DATE,@A.ORDER_DATE AS PRE_DATE,@A.ORDER_DATE:= A.ORDER_DATE FROM TBL_MAS_O... 阅读全文
posted @ 2018-04-19 19:03 Bob.Xie 阅读(4878) 评论(0) 推荐(0)
java 将byte[]转为各种进制的字符串
摘要： public void test() { byte[] bytes = new byte[10000000]; for (int i = 0; i < 10000000; i++) { if (i%3 == 0) { bytes[i] = 0; } else { bytes[i] = 1; } } 阅读全文
posted @ 2018-04-19 16:30 Bob.Xie 阅读(2182) 评论(0) 推荐(0)
Java 二进制和十进制互转，二进制和BitSet互转
摘要： /** * 二进制转十进制 * * @param binaryNumber * @return */ public static int binaryToDecimal(int binaryNumber) { int decimal = 0; int p = 0; while (... 阅读全文
posted @ 2018-04-19 16:26 Bob.Xie 阅读(10275) 评论(0) 推荐(0)