SHA-256加密演算法
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class SHA256 {
private final static String MESSAGE_DIGEST_ALGORITHM = "SHA-256";
public static final synchronized String getMessageDigest(byte[] data) throws NoSuchAlgorithmException {
MessageDigest digest = null;
if(digest == null)
try{
digest = MessageDigest.getInstance(MESSAGE_DIGEST_ALGORITHM);
}
catch(NoSuchAlgorithmException nosuchalgorithmexception)
{
System.err.println("Failed to load the MD5 MessageDigest. system will be unable to function normally.");
nosuchalgorithmexception.printStackTrace();
}
digest.reset();
digest.update(data);
return encodeHex(digest.digest());
}
public static final String encodeHex(byte abyte0[])
{
StringBuffer stringbuffer = new StringBuffer(abyte0.length * 2);
for(int i = 0; i < abyte0.length; i++)
{
if((abyte0[i] & 0xff) < 16)
stringbuffer.append("0");
stringbuffer.append(Long.toString(abyte0[i] & 0xff, 16));
}
return stringbuffer.toString();
}
public static void main(String[] args){
try{
String name="admin43";
String password="12345623";
String svalue=name+"--"+ password;
System.out.println(getMessageDigest(svalue.getBytes("UTF-8")));
}
catch(Exception e){
e.printStackTrace();
}
}
}