Java之加密(信息摘要)工具类(依赖：java.security.MessageDigest或org.apache.commons.codec.digest.DigestUtils)

依赖于java.security.MessageDigest,支持MD5,SHA-1,SHA-256

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

 /**
  * CiphertextUtil
  *
  * @author ysj
  */
 public class CiphertextUtil {
     public static final String MD5 = "MD5";
     public static final String SHA_1 = "SHA-1";
     public static final String SHA_256 = "SHA-256";
     private static final char[] CH_HEX = {'0', '1', '2', '3', '4', '5', '6', '7', '8',
         '9', 'A', 'B', 'C', 'D', 'E', 'F'};

     /**
      * 加密字符串
      *
      * @param sourceStr    需要加密目标字符串
      * @param algorithmsName 算法名称(如:MD5,SHA-1,SHA-256)
      * @return
      */
     public static String passAlgorithmsCiphering(String sourceStr,String algorithmsName){
         String password = "";
         MessageDigest md;
         try {
             md = MessageDigest.getInstance(algorithmsName);
             // 使用指定byte[]更新摘要
             md.update(sourceStr.getBytes());
             // 完成计算，返回结果数组
             byte[] b = md.digest();
             password = byteArrayToHex(b);
         } catch (NoSuchAlgorithmException e) {
             e.printStackTrace();
         }
         return password;
     }

     /**
      * 将字节数组转为十六进制字符串
      *
      * @param bytes
      * @return 返回16进制字符串
      */
     private static String byteArrayToHex(byte[] bytes) {
         // 一个字节占8位，一个十六进制字符占4位；十六进制字符数组的长度为字节数组长度的两倍
         char[] chars = new char[bytes.length * 2];
         int index = 0;
         for (byte b : bytes) {
             // 取字节的高4位
             chars[index++] = CH_HEX[b >>> 4 & 0xf];
             // 取字节的低4位
             chars[index++] = CH_HEX[b & 0xf];
         }
         return new String(chars);
     }
 }

依赖于org.apache.commons.codec.digest.DigestUtils,支持MD2,MD5,SHA-1,SHA-256,SHA-384,SHA-512

Apache下载地址:http://commons.apache.org/proper/commons-codec/download_codec.cgi

 import org.apache.commons.codec.digest.DigestUtils;

 /**
  * CiphertextUtil
  *
  * @author ysj
  */
 public class CiphertextUtil {
     public static final String MD2 = "MD2";
     public static final String MD5 = "MD5";
     public static final String SHA_1 = "SHA1";
     public static final String SHA_256 = "SHA256";
     public static final String SHA_384 = "SHA384";
     public static final String SHA_512 = "SHA512";

     /**
      * 加密字符串
      *
      * @param sourceStr    需要加密目标字符串
      * @param algorithmsName 算法名称(如:MD2,MD5,SHA1,SHA256,SHA384,SHA512)
      * @return
      */
     public static String passAlgorithmsCiphering(String sourceStr,String algorithmsName){
         String password = "";
         switch(algorithmsName){
         case "MD2":
             password = DigestUtils.md2Hex(sourceStr);
             break;
         case "MD5":
             password = DigestUtils.md5Hex(sourceStr);
             break;
         case "SHA1":
             password = DigestUtils.sha1Hex(sourceStr);
             break;
         case "SHA256":
             password = DigestUtils.sha256Hex(sourceStr);
             break;
         case "SHA384":
             password = DigestUtils.sha384Hex(sourceStr);
             break;
         case "SHA512":
             password = DigestUtils.sha512Hex(sourceStr);
             break;
         }
         return password;
     }
 }