SHA1.java

package com.hehenian.liumi.exchange;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class SHA1 {

	public static String getSHA1(String decript) {
		try {
			MessageDigest digest = java.security.MessageDigest
					.getInstance("SHA-1");
			digest.update(decript.getBytes());
			byte messageDigest[] = digest.digest();
			// Create Hex String
			StringBuffer hexString = new StringBuffer();
			// 字节数组转换为 十六进制 数
			for (int i = 0; i < messageDigest.length; i++) {
				String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
				if (shaHex.length() < 2) {
					hexString.append(0);
				}
				hexString.append(shaHex);
			}
			return hexString.toString();

		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
		return "";
	}

	public String toSHA1(String message) {
		MessageDigest md = null;
		try {
			md = MessageDigest.getInstance("SHA-1");
			md.update(message.getBytes("UTF-8"));
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
		byte[] result = md.digest();

		StringBuffer sbf = new StringBuffer();

		for (byte b : result) {
			int i = b & 0xff;
			if (i < 0xf) {
				sbf.append(0);
			}
			sbf.append(Integer.toHexString(i));
		}
		return sbf.toString();
	}
}