80 lines
2.1 KiB
Java
80 lines
2.1 KiB
Java
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package com.hxkj.common.utils;
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import java.nio.charset.StandardCharsets;
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import java.security.MessageDigest;
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import java.util.Random;
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import java.util.UUID;
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public class ToolsUtil {
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/**
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* 制作UUID
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*
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* @author fzr
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* @return String
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*/
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public static String makeUUID(){
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return UUID.randomUUID().toString().replaceAll("-","").substring(0,32);
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}
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/**
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* 制作MD5
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*
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* @author fzr
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* @param data 需加密的数据
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* @return String
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*/
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public static String makeMd5(String data){
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try {
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MessageDigest md5 = MessageDigest.getInstance("MD5");
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byte [] array = md5.digest(data.getBytes(StandardCharsets.UTF_8));
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StringBuilder sb = new StringBuilder();
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for (byte item : array) {
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sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
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}
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return sb.toString();
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}catch (Exception e){
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e.printStackTrace();
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}
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return null;
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}
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/**
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* 返回随机字符串
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*
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* @author fzr
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* @param length 要生成的长度
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* @return String
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*/
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public static String randomString(int length) {
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Random random = new Random();
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StringBuilder stringBuffer = new StringBuilder();
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String str = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
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int strLength = str.length();
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for (int i = 0; i < length; i++) {
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int index = random.nextInt(strLength);
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stringBuffer.append(str.charAt(index));
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}
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return stringBuffer.toString();
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}
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/**
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* 返回随机数字字符串
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*
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* @author fzr
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* @param length 要生成的长度
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* @return String
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*/
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public static String randomInt(int length) {
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Random random = new Random();
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StringBuilder stringBuffer = new StringBuilder();
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String str = "0123456789";
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for (int i = 0; i < length; i++) {
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int index = random.nextInt(10);
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stringBuffer.append(str.charAt(index));
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}
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return stringBuffer.toString();
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}
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}
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