Merge remote-tracking branch 'origin/4.2.x'

# Conflicts:
#	pom.xml

Author: OlgaMaciaszek

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/support/SpringMvcContract.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2024 the original author or authors.
+ * Copyright 2013-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -369,7 +369,10 @@ private void parseParams(MethodMetadata data, Method method, RequestMapping meth
 				data.template().query(resolve(nameValueResolver.getName()), resolve(nameValueResolver.getValue()));
 			}
 			else {
-				throw new IllegalArgumentException("Negated params are not supported: " + param);
+				if (LOG.isDebugEnabled()) {
+					LOG.debug("Negated params are not supported by Feign and ignored during parameter processing: "
+							+ param);
+				}
 			}
 		}
 	}

spring-cloud-openfeign-core/src/test/java/org/springframework/cloud/openfeign/support/SpringMvcContractTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2024 the original author or authors.
+ * Copyright 2013-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -68,6 +68,7 @@
 import static feign.CollectionFormat.CSV;
 import static feign.CollectionFormat.SSV;
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatCode;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
 import static org.junit.jupiter.api.Assumptions.assumeTrue;
@@ -509,11 +510,11 @@ void testProcessAnnotations_ParseParams_MultipleParamsWithoutValue() throws Exce
 	}
 
 	@Test
-	void testProcessAnnotations_ParseParams_NotEqualParams() throws Exception {
-		assertThatIllegalArgumentException().isThrownBy(() -> {
-			Method method = TestTemplate_ParseParams.class.getDeclaredMethod("notEqualParams");
+	void testProcessAnnotations_ParseParams_NegatedParams() {
+		assertThatCode(() -> {
+			Method method = TestTemplate_ParseParams.class.getDeclaredMethod("negatedParams");
 			contract.parseAndValidateMetadata(method.getDeclaringClass(), method);
-		});
+		}).doesNotThrowAnyException();
 	}
 
 	@Test
@@ -831,7 +832,7 @@ public interface TestTemplate_ParseParams {
 		ResponseEntity<TestObject> mixParams();
 
 		@GetMapping(value = "test", params = { "p1!=1" })
-		ResponseEntity<TestObject> notEqualParams();
+		ResponseEntity<TestObject> negatedParams();
 
 		@GetMapping(value = "test", params = { "p1=1" })
 		ResponseEntity<TestObject> paramsAndRequestParam(@RequestParam("p2") String p2);