package gboat2.web.util;
   
   import java.io.UnsupportedEncodingException;
   import java.security.MessageDigest;
   import java.security.NoSuchAlgorithmException;
   
   public class EncryptUtil {
   
   	// md5加密
  	public static String md5(String inputText) {
  		return encrypt(inputText, "md5");
  	}
  
  	// sha加密
  	public static String sha(String inputText) {
  		return encrypt(inputText, "sha-1");
  	}
  
  	/**
  	 * md5或者sha-1加密
  	 * 
  	 * @param inputText
  	 *            要加密的内容
  	 * @param algorithmName
  	 *            加密算法名称：md5或者sha-1，不区分大小写
  	 * @return
  	 */
  	private static String encrypt(String inputText, String algorithmName) {
  		if (inputText == null || "".equals(inputText.trim())) {
  			throw new IllegalArgumentException("请输入要加密的内容");
  		}
  		if (algorithmName == null || "".equals(algorithmName.trim())) {
  			algorithmName = "md5";
  		}
  		String encryptText = null;
  		try {
  			MessageDigest m = MessageDigest.getInstance(algorithmName);
  			m.update(inputText.getBytes("UTF8"));
  			byte s[] = m.digest();
  			// m.digest(inputText.getBytes("UTF8"));
  			return hex(s);
  		} catch (NoSuchAlgorithmException e) {
  			e.printStackTrace();
  		} catch (UnsupportedEncodingException e) {
  			e.printStackTrace();
  		}
  		return encryptText;
  	}
  
  	// 返回十六进制字符串
  	private static String hex(byte[] arr) {
  		StringBuffer sb = new StringBuffer();
  		for (int i = 0; i < arr.length; ++i) {
  			sb.append(Integer.toHexString((arr[i] & 0xFF) | 0x100).substring(1,
  					3));
  		}
  		return sb.toString();
  	}
  
  	public static void main(String[] args) {
  		// md5加密测试
  		String md5_1 = md5("yjf_123456789.11.88");
  		System.out.println("-------->" + md5_1);
  		// String md5_2 = md5("abc");
  		// System.out.println(md5_1 + "\n" + md5_2);
  		// System.out.println("md5 length: " + md5_1.length());
  		// //sha加密测试
  		// String sha_1 = sha("123");
  		// String sha_2 = sha("abc");
  		// System.out.println(sha_1 + "\n" + sha_2);
  		// System.out.println("sha length: " + sha_1.length());
  	}
  }