Java加密工具類

依賴:org.apache.commons.codec.digest.DigestUtils
支持MD5,SHA-1,SHA-256
Apache下載地址:http://commons.apache.org/proper/commons-codec/download_codec.cgi

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    需要加密目標字符串
@param algorithmsName 算法名稱(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());
 // 完成計算，返回結果數組
 byte[] b = md.digest();
 password = byteArrayToHex(b);

} catch (NoSuchAlgorithmException e) {

 e.printStackTrace();

}
 return password;
}
/**

將字節數組轉為十六進制字符串
*
@param bytes
@return 返回16進制字符串
/
private static String byteArrayToHex(byte[] bytes) {
 // 一個字節占8位，一個十六進制字符占4位；十六進制字符數組的長度為字節數組長度的兩倍
 char[] chars = new char[bytes.length  2];
 int index = 0;
 for (byte b : bytes) {
 // 取字節的高4位
 chars[index++] = CH_HEX[b >>> 4 & 0xf];
 // 取字節的低4位
 chars[index++] = CH_HEX[b & 0xf];

 }
 return new String(chars);
}
}</pre> 

 
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    需要加密目標字符串
@param algorithmsName 算法名稱(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;
}
}</pre>