58 lines
1.2 KiB
Plaintext
58 lines
1.2 KiB
Plaintext
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package com.sercurityControl.proteam.util;
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import java.util.Random;
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import java.util.UUID;
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public class UUIDHelper {
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/**
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* 封装JDK自带的UUID, 通过Random数字生成, 中间无-分割.
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*/
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public static String get32UUID() {
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String uuid = UUID.randomUUID().toString().trim().replaceAll("-", "");
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return uuid;
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}
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/**
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* 封装JDK自带的UUID, 通过Random数字生成, 中间有-分割.
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*/
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public static String uuid() {
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return UUID.randomUUID().toString();
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}
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/**
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* 得到纯数字编号
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* @param length 长度
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* @return
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*/
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public static String number(int length) {
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StringBuilder str = new StringBuilder();
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for (int i = 0; i < length; i++) {
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if (i == 0){
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str.append(getRandom(49, 57));
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} else{
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str.append(getRandom(48, 57));
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}
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}
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return str.toString();
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}
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/**
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* 根据开始和结束大小得到单一字符
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* @param begin 开始值
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* @param end 结束值
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* @return 单一字符
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*/
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private static String getRandom(int begin, int end) {
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String str = "";
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Random rd = new Random();
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int number = 0;
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while (str.length() == 0) {
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number = rd.nextInt(end + 1);
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if (number >= begin && number <= end){
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str = String.valueOf((char) number);
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}
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}
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return str;
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}
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}
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