java SHA256加密工具类

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

/**
* SHA256 摘要算法工具类
* @author Administrator
*
*/
public class SHA256Util {

  /**
  * 利用java原生的摘要实现SHA256加密
  * @param str 加密后的报文
  * @return
  */
  public static String getSHA256StrJava(String str){
    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;
  }

  /**
  * 将byte转为16进制
  * @param bytes
  * @return
  */
  private static String byte2Hex(byte[] bytes){
    StringBuffer stringBuffer = new StringBuffer();
    String temp = null;
    for (int i=0;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();
  }

}

 

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转载于:https://www.cnblogs.com/vicF/p/7461804.html

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