PHP

echo hash('sha256', 'ddsd');

Java

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Test {

    public static String Encrypt(String strSrc) {
        MessageDigest md = null;
        String strDes = null;
        byte[] bt = strSrc.getBytes();
        try {
            md = MessageDigest.getInstance("sha-256");
            md.update(bt);
            strDes = bytes2Hex(md.digest()); // to HexString
        } catch (NoSuchAlgorithmException e) {
            System.out.println("签名失败！");
            return null;
        }
        return strDes;
    }
    public static String bytes2Hex(byte[] bts) {
        String des = "";
        String tmp = null;
        for (int i = 0; i < bts.length; i++) {
            tmp = (Integer.toHexString(bts[i] & 0xFF));
            if (tmp.length() == 1) {
                des += "0";
            }
            des += tmp;
        }
        return des;
    }

    public static void main(String[] args) {
        System.out.println(Encrypt("ddsd"));
    }
}