java 接口转码、加密

package http;

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

public class sha256 {
public String Encrypt(String strSrc, String encName) {
MessageDigest md = null;
String strDes = null;

byte[] bt = strSrc.getBytes();
try {
if (encName == null || encName.equals("")) {
encName = "SHA-256";
}
md = MessageDigest.getInstance(encName);
md.update(bt);
strDes = bytes2Hex(md.digest()); // to HexString
} catch (NoSuchAlgorithmException e) {
return null;
}
//  System.out.println(strDes);
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;
}
}