IDUtils.java

package cn.com.polysoft.utils;

/**
 * id生成策略
 * @author weijixiang
 * @Description
 * @date 2019/7/31.
 */
public class IDUtils {
    private static byte[] lock = new byte[0];

    /**
     * 5位数
     */
    private final static long w = 100000;

    /**
     * 使用时间戳+5位随机数作为主键ID
     * @return
     */
    public static String createID() {
        long r = 0;
        synchronized (lock) {
            r = (long) ((Math.random() + 1) * w);
        }

        return System.currentTimeMillis() + String.valueOf(r).substring(1);
    }
}