app接口。新增了两个接口

src/main/java/com/example/caseData/extend/app/Base.java

@@ -2,9 +2,13 @@ package com.example.caseData.extend.app;
 
 import cn.hutool.http.HttpRequest;
 import cn.hutool.http.HttpResponse;
+import com.example.caseData.exception.BusinessException;
 import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import jakarta.servlet.http.HttpServletRequest;
 import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.io.IOUtils;
 
 import javax.crypto.Mac;
 import javax.crypto.spec.SecretKeySpec;
@@ -119,4 +123,45 @@ public class Base {
             return response.body();
         }
     }
+
+    /**
+     * 校验签名
+     * @param request   请求对象
+     * @param secretKey 密钥
+     * @param mapper    ObjectMapper 实例（用于 JSON 反序列化）
+     */
+    public static void checkSign(HttpServletRequest request, String secretKey, ObjectMapper mapper) {
+        try {
+            String appId = request.getHeader("appId");
+            String sign = request.getHeader("sign");
+
+            if (appId == null || appId.isEmpty()) {
+                throw new BusinessException("-1", "请求未授权");
+            }
+            if (sign == null || sign.isEmpty()) {
+                throw new BusinessException("-1", "缺少签名");
+            }
+
+            // 读取请求体
+            String body = IOUtils.toString(request.getInputStream(), StandardCharsets.UTF_8);
+            if (body == null || body.isEmpty()) {
+                throw new BusinessException("-1", "请求体为空");
+            }
+
+            // 使用 TypeReference 明确泛型类型，避免警告
+            Map<String, Object> params = mapper.readValue(body, new TypeReference<Map<String, Object>>() {});
+
+            // 生成签名
+            String serverSign = Base.genSignature(params, secretKey);
+
+            if (!sign.equals(serverSign)) {
+                throw new BusinessException("-1", "签名错误");
+            }
+
+        } catch (BusinessException e) {
+            throw e;
+        } catch (Exception e) {
+            throw new BusinessException("-1", "签名校验失败：" + e.getMessage());
+        }
+    }
 }