MD5 and SHA-1
MD5 and SHA-1
package common.util.security;import java.io.UnsupportedEncodingException;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;public class EncryptUtil {public static void main(String[] args) {//md5加密测试String md5_1 = md5("123");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());}// 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();}