加解签规则

以下提供java针对某些特殊字符串的URLEncode结果：

 String str = "!\"#$%&'()*+,-./0123456789:;<=>?@ABC[\\]^_`abc{|}~江 西【】「」（）北极。；‘《》背景";
 System.out.println(URLEncoder.encode(str, "UTF-8"));
 
 结果:
 %21%22%23%24%25%26%27%28%29*%2B%2C-.%2F0123456789%3A%3B%3C%3D%3E%3F%40ABC%5B%5C%5D%5E_%60abc%7B%7C%7D%7E%E6%B1%9F+%E8%A5%BF%E3%80%90%E3%80%91%E3%80%8C%E3%80%8D%EF%BC%88%EF%BC%89%E5%8C%97%E6%9E%81%E3%80%82%EF%BC%9B%E2%80%98%E3%80%8A%E3%80%8B%E8%83%8C%E6%99%AF

_SIGN='sign'
_SIGNTYPE='signType'

def icareSign(params,appKey):
    #先排序
    params = {k: v for k, v in sorted(params.items(), key=lambda x: x[0])}
    #去除不需要参与加签的字符串
    for k in list(params.keys()):
        if (k.casefold() == _SIGN.casefold() or k.casefold() == _SIGNTYPE.casefold()):
            del params[k]
            continue
    # 计算MD5前的字符串
    md5Str = urllib.parse.urlencode(params) + appKey
    print("md5Str--括号内字符串-->(%s)" % ( md5Str))
    # 计算签名
    sign = hashlib.md5(md5Str.encode(encoding='utf-8')).hexdigest()
    return sign

public void doWork(Config config) {
        Map<String, String> map = new HashMap<>();
        map.put("channelCode", config.getChannelCode());
        map.put("thirdUserId", config.getThirdUserId());
        map.put("charset", "UTF8");
        map.put("nonce", UUID.randomUUID().toString());
        map.put("name", "我爱吃西瓜");
        map.put("phone", "15112121234");
        map.put("timestamp", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
        //扩展信息======================start
        Map<String, Object> bizContentMap = new HashMap<>();
        //当redirect 填入指定值后，免密登录成功由最福利跳转到该指定的页面，不填入则默认跳转到最福利首页
        bizContentMap.put("redirect", "https://t-ord.zuifuli.com/m/customer");
        map.put("bizContent", JSON.toJSONString(bizContentMap));
        //扩展信息======================end
        String sign = ZflSignUtil.sign(map, ImmutableSet.of("sign", "signType"), config.getAppKey(), false);
        map.put("sign", sign);
        map.put("signtType", "MD5");
        String query = ZflSignUtil.buildQuery(map, null, StandardCharsets.UTF_8.name(), true);
        String requestUrl = String.format("%s?%s", config.getLoginUrlPersonalV2(), query);
        System.out.println(String.format("联合登录的请求的地址:%s", requestUrl));
    }

import org.apache.commons.codec.binary.Hex;
import org.apache.commons.lang3.StringUtils;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;

public class ZflSignUtil {

    /**
     * @param params      请求参数
     * @param excludSet   ImmutableSet.of("sign", "signType")
     * @param appKey
     * @param isLowerCase  是否转小写
     * @return
     */
    public static String sign(Map<String, String> params, Set<String> excludSet, String appKey, boolean isLowerCase) {
        params = exclude(params, excludSet);
        String s = buildQuery(params, null, "UTF-8", true);
        if (isLowerCase) {
            s = s.toLowerCase();
        }
        return string2MD52(s + appKey);
    }

    /**
     * 构建加密参数
     *
     * @param params
     * @param paramsSortSet
     * @param charset
     * @param emptyIgnore
     * @return
     */
    public static String buildQuery(Map<String, String> params, Set<String> paramsSortSet, String charset, boolean emptyIgnore) {
        StringBuffer sb = new StringBuffer();
        if (paramsSortSet == null) {
            paramsSortSet = new TreeSet<>(params.keySet());
        }
        for (String paraName : paramsSortSet) {
            try {
                String value = params.get(paraName);
                if (StringUtils.isEmpty(value) && emptyIgnore)
                    continue;
                sb.append(URLEncoder.encode(paraName, charset));
                sb.append("=");
                sb.append(URLEncoder.encode(value == null ? "" : value, charset));
                sb.append("&");
            } catch (UnsupportedEncodingException e) {
                throw new RuntimeException(e);
            }
        }
        if (sb.length() > 0) {
            sb.delete(sb.length() - 1, sb.length());
        }
        return sb.toString();
    }

    /**
     * md5
     */
    private static String string2MD52(String md5) {
        System.out.println("MD5前的字符串:"+md5);
        try {
            java.security.MessageDigest md = java.security.MessageDigest.getInstance("MD5");
            byte[] array = md.digest(md5.getBytes());
            return Hex.encodeHexString(array);
        } catch (java.security.NoSuchAlgorithmException e) {
        }
        return null;
    }

    /**
     * 排除指定的字段
     * @param params
     * @param paramExclude
     * @return
     */
    private static Map<String, String> exclude(Map<String, String> params, Set<String> paramExclude) {
        if (paramExclude != null) {
            for (String key : paramExclude) {
                params.remove(key);
            }
        }
        return params;
    }
}

// 这个方法是为了跟java的encode相兼容
        public static string Encode(string s)
        {
            StringBuilder sb = new StringBuilder(s.Length * 2);
            byte[] arr = Encoding.UTF8.GetBytes(s);
            for (int i = 0; i < arr.Length; i++)
            {
                byte c = arr[i];
                if (c == '*' || c == '_' || c == '-' || c == '.')
                    sb.Append((char)c);
                else if(c == ' ')
                    sb.Append((char)'+');
                else if (c >= 0x41 && c <= 0x5A)//A-Z
                    sb.Append((char)c);
                else if (c >= 0x61 && c <= 0x7A)//a-z
                    sb.Append((char)c);
                else if (c >= 0x30 && c <= 0x39)//123456789
                    sb.Append((char)c);
                else
                {
                    sb.Append('%');
                    sb.Append(Convert.ToString(c, 16).ToUpper());//转成 16进制
                }
            }
            return sb.ToString();
        }
    }

public class DemoAction {
    public static void main(String[] args) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String now = sdf.format(new Date());
        String nonce = UUID.randomUUID().toString().replace("-", "").toLowerCase();
        Map<String,String> params = new HashMap<>();
        params.put("merchantCode","yonghuichaoshi");
        params.put("timestamp",now);
        params.put("charset","UTF8");
        params.put("nonce",nonce);
        Set<String> exclude = new HashSet<>();
        exclude.add("sign");
        exclude.add("signType");
        String sign = ZuifuliSignUtil.sign(params, exclude, "nOjRu2V4FDjNyCqkMJSpQMuXEUxYoj", true);
        params.put("sign",sign);
        params.put("signType","MD5");
        log.info("---------------------------" + JSON.toJSONString(params));

    }
}