Java-MD5

Java封装转换MD5值程序-MD5Utils

package cn.lpl666;
import java.security.MessageDigest;
public class MD5Utils {
  public static String MD5(String s) {
    try {
      MessageDigest md = MessageDigest.getInstance("MD5");
      byte[] bytes = md.digest(s.getBytes("utf-8"));
      return toHex(bytes);
    }
    catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
  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();
  }
}

测试代码

package cn.lpl666;
public class Test {
  public static void main(String[] args) {
    String pwd = "123456";
    String md5Value = MD5Utils.MD5(pwd);
    System.out.println(md5Value); // E10ADC3949BA59ABBE56E057F20F883E
  }
}