123 lines
4.2 KiB
Java
123 lines
4.2 KiB
Java
package com.example.caseData.extend.app;
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import cn.hutool.http.HttpRequest;
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import cn.hutool.http.HttpResponse;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import lombok.extern.slf4j.Slf4j;
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import javax.crypto.Mac;
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import javax.crypto.spec.SecretKeySpec;
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import java.nio.charset.StandardCharsets;
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import java.util.Map;
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import java.util.*;
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@Slf4j
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public class Base {
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private static final ObjectMapper objectMapper = new ObjectMapper();
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/**
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* 生成签名
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* @param params 需要签名的参数（支持嵌套 Map）
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* @param secretKey 密钥
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* @return 签名字符串
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*/
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public static String genSignature(Map<String, Object> params, String secretKey) {
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try {
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// Step 1: 对 Map 进行递归排序
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Map<String, Object> sortedMap = sortMapRecursively(params);
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// Step 2: 转为 JSON 字符串
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String json = objectMapper.writeValueAsString(sortedMap);
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// Step 3: 使用 HMAC-SHA256 签名
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return hmacSha256(json, secretKey);
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} catch (JsonProcessingException e) {
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return null;
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}
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}
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/**
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* 对 Map<String, Object> 进行递归排序（key 排序），支持嵌套 Map 和 List
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*/
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public static Map<String, Object> sortMapRecursively(Map<String, Object> data) {
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Map<String, Object> sortedMap = new TreeMap<>(); // TreeMap 会自动按 key 排序
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for (Map.Entry<String, Object> entry : data.entrySet()) {
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String key = entry.getKey();
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Object value = entry.getValue();
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if (value instanceof Map) {
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// 如果是嵌套 map，递归排序
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@SuppressWarnings("unchecked")
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Map<String, Object> nestedMap = (Map<String, Object>) value;
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sortedMap.put(key, sortMapRecursively(nestedMap));
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} else if (value instanceof List) {
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// 如果是列表，检查每一项是否是 map，如果是则排序
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@SuppressWarnings("unchecked")
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List<Object> list = (List<Object>) value;
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List<Object> sortedList = new ArrayList<>();
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for (Object item : list) {
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if (item instanceof Map) {
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@SuppressWarnings("unchecked")
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Map<String, Object> nestedItemMap = (Map<String, Object>) item;
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sortedList.add(sortMapRecursively(nestedItemMap));
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} else {
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sortedList.add(item);
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}
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}
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sortedMap.put(key, sortedList);
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} else {
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// 普通字段，直接插入
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sortedMap.put(key, value);
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}
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}
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return sortedMap;
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}
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/**
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* HMAC-SHA256 加密
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*/
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private static String hmacSha256(String data, String key) {
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try {
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Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
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SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "HmacSHA256");
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sha256_HMAC.init(secretKeySpec);
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byte[] result = sha256_HMAC.doFinal(data.getBytes(StandardCharsets.UTF_8));
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// 转为 16 进制字符串
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StringBuilder hexString = new StringBuilder();
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for (byte b : result) {
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String hex = Integer.toHexString(0xff & b);
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if (hex.length() == 1) hexString.append('0');
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hexString.append(hex);
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}
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return hexString.toString();
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} catch (Exception e) {
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return null;
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}
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}
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/**
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* 发送 POST JSON 请求
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* @param url 请求地址
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* @param jsonData JSON 字符串
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* @param headers 请求头
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* @return 响应字符串
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*/
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public String postJson(String url, String jsonData, Map<String, String> headers) {
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HttpRequest request = HttpRequest.post(url)
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.body(jsonData)
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.header("Content-Type", "application/json");
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if (headers != null) {
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headers.forEach(request::header);
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}
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try (HttpResponse response = request.execute()) {
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return response.body();
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}
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}
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}
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