本文实例讲述了Java SHA-256加密的两种实现方法。分享给大家供大家参考,具体如下:
参考文献
Java实现SHA256算法 - 自学java的小陈 - 博客园 (cnblogs.com)
1、利用Apache的工具类实现加密:
maven:
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>${common-codec.version}</version>
</dependency>
实现代码:
* 利用Apache的工具类实现SHA-256加密
* @param str 加密后的报文
* @return
public static String getSHA256Str(String str){
MessageDigest messageDigest;
String encdeStr = "";
try {
messageDigest = MessageDigest.getInstance("SHA-256");
byte[] hash = messageDigest.digest(str.getBytes("UTF-8"));
encdeStr = Hex.encodeHexString(hash);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return encdeStr;
2、利用Java自带的实现加密:
* 利用java原生的摘要实现SHA256加密
* @param str 加密后的报文
* @return
* import java.io.UnsupportedEncodingException;
* import java.security.MessageDigest;
* import java.security.NoSuchAlgorithmException;
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[] byteBuffer){
StringBuffer strHexString = new StringBuffer();
for (int i = 0; i < byteBuffer.length; i++) {
String hex = Integer.toHexString(0xff & byteBuffer[i]);
if (hex.length() == 1) {
strHexString.append('0');
}
strHexString.append(hex);
}
return stringBuffer.toString();