根据身份证判断男女的规则:二代身份证为18位,判断倒数第二位,第二位若为奇数,性别为男:偶数则为女 一代身份证为15为,判断倒数第一位,规则同上. update 表名 set 表名.字段名= case when substring(表名,身份证字段,17,1)%2=1 and length(表名.身份证字段) =18 then "男" when substring(表名,身份证字段,17,1)%2=0 and length(表名.身份证字段) =18 then "女"
java大数判断相等: 1.equals()方法2.compareTo()方法区别:2.00与2.0 equals()方法判断不等,compareTo()方法判断相等,科学的说法可以看java api文档可以通过equals()方法加striptrailingzeros()方法等效于compareTo()方法. import java.util.*; import java.math.*; public class Main { public static void main(String[]
import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; public class Test { public static void main(String args[]) throws InterruptedException { ExecutorService exe = Executors.newFixedThreadPool(3); for (int i = 1; i <= 5
Java 实现判断 主机是否能 ping 通 代码实现如下: import java.io.IOException; import java.net.InetAddress; import java.net.UnknownHostException; /** * Created by Miracle Luna on 2019/12/10 */ public class PingUtil { public static void main(String[] args) { String host1