签名算法（丫丫智能锁）按ASCII码从小到大排序（字典序）+key+MD5+转大写

我就是我 2024-04-17 19:16 45阅读 0赞

package Test;
     
    import java.math.BigInteger;
    import java.security.MessageDigest;
    import java.security.NoSuchAlgorithmException;
    import java.util.Iterator;
    import java.util.Map;
    import java.util.Set;
    import java.util.SortedMap;
    import java.util.TreeMap;
     
    public class 签名算法 {
     	/**
         * sign 签名 （参数名按ASCII码从小到大排序（字典序）+key+MD5+转大写签名）
         *
         * @return
         */
        public static String createSign(Map params, String key) {
     
            StringBuffer sbkey = new StringBuffer();
            // entrySet 所有参与传参的参数按照accsii排序（升序）
            Set es = params.entrySet();
            Iterator it = es.iterator();
     
            while (it.hasNext()) {
                Map.Entry entry = (Map.Entry) it.next();
                String k = (String) entry.getKey();
                Object v = entry.getValue();
                //空值不传递，不参与签名组串
                if (null != v && !"".equals(v)) {
                    sbkey.append(k + "=" + v + "&");
                }
            }
     
            sbkey = sbkey.append("SIGN=" + key);
            System.out.println(sbkey);
            //MD5加密,结果转换为大写字符
            String sign = encodeByMD5(sbkey.toString()).toUpperCase();
            return sign;
        }
     
        /**
         * 对字符串进行MD5加密
         *
         * @param str 需要加密的字符串
         * @return 小写MD5字符串 32位
         */
        public static String encodeByMD5(String str) {
            MessageDigest digest;
     
            try {
                digest = MessageDigest.getInstance("MD5");
                digest.update(str.getBytes());
                return new BigInteger(1, digest.digest()).toString(16);
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
                return null;
            }
        }
     
         public static void main(String[] args) {
                SortedMap <String, Object> params = new TreeMap <>();
                params.put("APPID", "AEC749FBFDA641DBAB5A8487C3A00EE1");
                params.put("NONCESTR", "1UUSDYYYNMLKKS");
                params.put("USERNAME", "13800000001");
                params.put("PASSWORD", "123456");
                params.put("PHONEID", "android");
                params.put("PHONEIP", "PHONEIP");
                params.put("sign", createSign(params, "69F559FF22D8A7F856DBF45D2097A87C"));
         }
     
     
     
    }