package org.jeecg.common.util;
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import java.security.MessageDigest;
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/**
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* SHA256
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* 密码加密工具
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*/
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public class SHA256Util {
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/**
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* 利用java原生的摘要实现SHA256加密
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* @param str 加密后的报文
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* @return
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*/
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public static String getSHA256Str(String str) {
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MessageDigest messageDigest;
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String encodeStr;
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try {
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messageDigest = MessageDigest.getInstance("SHA-256");
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messageDigest.update(str.getBytes("UTF-8"));
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encodeStr = byte2Hex(messageDigest.digest());
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} catch (Exception e) {
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e.printStackTrace();
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return null;
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}
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return encodeStr;
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}
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/**
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* 将byte转为16进制
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* @param bytes
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* @return
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*/
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private static String byte2Hex(byte[] bytes) {
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StringBuffer buffer = new StringBuffer();
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String temp = null;
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for(int i = 0; i < bytes.length; i++) {
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temp = Integer.toHexString(bytes[i] & 0xFF);
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if(temp.length() == 1) {
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//1得到一位的进行补0操作
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buffer.append("0");
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}
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buffer.append(temp);
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}
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return buffer.toString();
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}
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}
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