YvCeung commented on code in PR #7430:
URL: https://github.com/apache/incubator-seata/pull/7430#discussion_r2139513951


##########
core/src/main/java/org/apache/seata/core/rpc/netty/http/ParameterParser.java:
##########
@@ -26,19 +26,28 @@
 import java.lang.reflect.Parameter;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
+
 import org.apache.seata.common.rpc.http.HttpContext;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import static 
com.fasterxml.jackson.databind.SerializationFeature.FAIL_ON_EMPTY_BEANS;
 
+/**
+ * A utility class for parsing HTTP request parameters and converting them 
into Java objects.
+ * Supports various parameter types including request params, request body, 
model attributes, etc.
+ */
 public class ParameterParser {
 
     private static final Logger LOGGER = 
LoggerFactory.getLogger(ParameterParser.class);
 
     private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper()
         .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, 
false).configure(FAIL_ON_EMPTY_BEANS, false);
 
+    private static final String DEFAULT_NONE = 
"\n\t\t\n\t\t\n\ue000\ue001\ue002\n\t\t\t\t\n";

Review Comment:
   In the seata-core module, spring-web cannot be relied on, so a custom value 
of the same needs to be defined



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