- import java.io.IOException;
- import java.math.BigInteger;
- import java.security.MessageDigest;
- import java.security.NoSuchAlgorithmException;
- import sun.misc.BASE64Decoder;
- import sun.misc.BASE64Encoder;
- /**
- * 常用加密算法工具类
- * @author cq
- */
- public class EncryptUtils {
- /**
- * 用MD5算法进行加密
- * @param str 需要加密的字符串
- * @return MD5加密后的结果
- */
- public static String encodeMD5String(String str) {
- return encode(str, "MD5");
- }
- /**
- * 用SHA算法进行加密
- * @param str 需要加密的字符串
- * @return SHA加密后的结果
- */
- public static String encodeSHAString(String str) {
- return encode(str, "SHA");
- }
- /**
- * 用base64算法进行加密
- * @param str 需要加密的字符串
- * @return base64加密后的结果
- */
- public static String encodeBase64String(String str) {
- BASE64Encoder encoder = new BASE64Encoder();
- return encoder.encode(str.getBytes());
- }
- /**
- * 用base64算法进行解密
- * @param str 需要解密的字符串
- * @return base64解密后的结果
- * @throws IOException
- */
- public static String decodeBase64String(String str) throws IOException {
- BASE64Decoder encoder = new BASE64Decoder();
- return new String(encoder.decodeBuffer(str));
- }
- private static String encode(String str, String method) {
- MessageDigest md = null;
- String dstr = null;
- try {
- md = MessageDigest.getInstance(method);
- md.update(str.getBytes());
- dstr = new BigInteger(1, md.digest()).toString(16);
- } catch (NoSuchAlgorithmException e) {
- e.printStackTrace();
- }
- return dstr;
- }
- public static void main(String[] args) throws IOException {
- String user = "oneadmin";
- System.out.println("原始字符串 " + user);
- System.out.println("MD5加密 " + encodeMD5String(user));
- System.out.println("SHA加密 " + encodeSHAString(user));
- String base64Str = encodeBase64String(user);
- System.out.println("Base64加密 " + base64Str);
- System.out.println("Base64解密 " + decodeBase64String(base64Str));
- }
- }
转:http://cqjava.iteye.com/blog/486110