SHA256加密

package com.shdata.saturn.utils;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**

• @author zzq

• @date 2020/11/04 17:09
  */
  public class SHAUtil {

  public String getSHA256(String str) {
  if("".equals(str)){
  return null;
  }
  MessageDigest messageDigest;
  String encodeStr = "";
  try {
  messageDigest = MessageDigest.getInstance("SHA-256");
  messageDigest.update(str.getBytes("UTF-8"));
  encodeStr = byte2Hex(messageDigest.digest());
  } catch (NoSuchAlgorithmException e) {
  e.printStackTrace();
  } catch (UnsupportedEncodingException e) {
  e.printStackTrace();
  }
  return encodeStr;
  }

  private String byte2Hex(byte[] bytes) {
  StringBuffer stringBuffer = new StringBuffer();
  String temp = null;
  for (int i = 0; i < bytes.length; i++) {
  temp = Integer.toHexString(bytes[i] & 0xFF);
  if (temp.length() == 1) {
  //1得到一位的进行补0操作
  stringBuffer.append("0");
  }
  stringBuffer.append(temp);
  }
  return stringBuffer.toString();
  }
  }