系统：拦截器调整，统一异常处理，防重复提交指纹

smtweb-framework/core/src/main/java/cc/smtweb/framework/core/session/SessionUtil.java

@@ -170,12 +170,13 @@ public class SessionUtil {
             //校验指纹
             String fpKey = us != null ? String.valueOf(us.getUserId()): request.getSession(true).getId();
             int fpv = readFingerVal(request);
-
-            SessionCache cache = SessionCacheFactory.getInstance().getCache(KEY_PARAM_FP_KEY, 1200L);
-            AtomicInteger ai = cache.get(fpKey + "_" + fpk);
-            int bv = ai != null ? ai.get() : 0;
-            if (fpv != bv) {
-                throw new BizException(SwConsts.ErrorCode.TOKEN_INVALID, "指纹错误，请勿重复提交！");
+            if (fpv > 0) {
+                SessionCache cache = SessionCacheFactory.getInstance().getCache(KEY_PARAM_FP_KEY, 1200L);
+                AtomicInteger ai = cache.get(fpKey + "_" + fpk);
+                int bv = ai != null ? ai.get(): 0;
+                if (fpv != bv) {
+                    throw new BizException(SwConsts.ErrorCode.TOKEN_INVALID, "指纹错误，请勿重复提交！");
+                }
             }
         }
     }