package ${enclosing_package};

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class ${primary_type_name} {
    /**
     * 使用md5的算法進行加密
     */
    public static String md5(String plainText) {
        byte[] secretBytes = null
 
;
        try {
            secretBytes = MessageDigest.getInstance("md5").digest(
                    plainText.getBytes());
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException("沒有md5這個算法！");
        }
        String md5code = new BigInteger(1, secretBytes).toString(16);//
 
 16進制數字
        // 如果生成數字未滿32位，需要前面補0
        for (int i = 0; i < 32 - md5code.length(); i++) {
            md5code = "0" + md5code;
        }
        return md5code;
    }

    public static void main(String[] args) {
        System.out.println(md5("123"));
    }

}

MD5Utils工具類模板