MD5 加密-32/16 位 | 工具类

package cn.com.pass;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class SendMD5 {

    public static void main(String[] args) {
        printMD5("abcABC");
    }

  private static String printMD5(String password) {
	//存放最终结果
	String result = "";
		try {
		//选择加密方式
		MessageDigest md = MessageDigest.getInstance("MD5");
		//将密码分析成字节的形式
		md.update(password.getBytes());
		byte b[] = md.digest();
		int i;
		StringBuffer buf = new StringBuffer("");
		for (int offset = 0; offset < b.length; offset++) {
		    i = b[offset];
		    if (i < 0)
		        i += 256;
		    if (i < 16)
		        buf.append("0");
		    buf.append(Integer.toHexString(i));
		}
		result = buf.toString();
		//32，16位密码打印
		System.out.println("MD5(" + password + ",32) = " + result);
		System.out.println("MD5(" + password + ",16) = " + buf.toString().substring(8, 24));
		} catch (NoSuchAlgorithmException e) {
		System.out.println(e);
		e.printStackTrace();
	}
	return result;
  }
}

对应输出结果：

MD5(abcABC,32) = 0ace325545119ac99f35a58e04ac2df1
MD5(abcABC,16) = 45119ac99f35a58e