package com.core.utils;

import com.core.common.Cools;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

public class SignUtils {

    public static String sign(Map<String, Object> param, String key) {
        List<String> list = new ArrayList<>();
        for (String mapKey : param.keySet()) {
            Object value = param.get(mapKey);
            if ("sign".equals(mapKey) || value == null) {
                continue;
            }
            list.add(mapKey + "=" + value + "&");
        }
        String[] arr = list.toArray(new String[0]);
        Arrays.sort(arr, String.CASE_INSENSITIVE_ORDER);
        StringBuilder builder = new StringBuilder();
        for (String item : arr) {
            builder.append(item);
        }
        String text = builder.toString() + "key=" + key;
        return Cools.md5(text).toUpperCase();
    }
}