java加密MD5实现及密码验证

package test;

import java.io.UnsupportedEncodingException;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

import org.junit.Test;

public class Teste {

	@Test

	public void testMd5() {

		System.out.println(encrypt("1234567"));

	}

	@Test

	public void testlogin() {

		String password = encrypt("123456adfaf");

		if(encrypt("123456adfaf").equals(password)) {

			System.out.println("密码正确");

		} else {

			System.out.println("密码错误");

		}

	}

	private String encrypt(String password) {

		String passwordMd5 = null;

		try {

			MessageDigest md5 = MessageDigest.getInstance("MD5");

			byte[] bytes = md5.digest(password.getBytes("utf-8"));

			passwordMd5 = toHex(bytes);

		} catch (NoSuchAlgorithmException | UnsupportedEncodingException e) {

			e.printStackTrace();

		}

		return passwordMd5;

	}

	private static String toHex(byte[] bytes) {

	    final char[] HEX_DIGITS = "0123456789ABCDEF".toCharArray();

	    StringBuilder ret = new StringBuilder(bytes.length * 2);

	    for (int i=0; i<bytes.length; i++) {

	        ret.append(HEX_DIGITS[(bytes[i] >> 4) & 0x0f]);

	        ret.append(HEX_DIGITS[bytes[i] & 0x0f]);

	    }

	    return ret.toString();

	}

}
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java加密MD5实现及密码验证

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