diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/VendorExtension.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/VendorExtension.java
index 9be773475f2c..550a7c6d80a2 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/VendorExtension.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/VendorExtension.java
@@ -19,6 +19,7 @@ public enum VendorExtension {
     X_SETTER_EXTRA_ANNOTATION("x-setter-extra-annotation", ExtensionLevel.FIELD, "Custom annotation that can be specified over java setter for specific field", "When field is array & uniqueItems, then this extension is used to add `@JsonDeserialize(as = LinkedHashSet.class)` over setter, otherwise no value"),
     X_WEBCLIENT_BLOCKING("x-webclient-blocking", ExtensionLevel.OPERATION, "Specifies if method for specific operation should be blocking or non-blocking(ex: return `Mono<T>/Flux<T>` or `return T/List<T>/Set<T>` & execute `.block()` inside generated method)", "false"),
     X_WEBCLIENT_RETURN_EXCEPT_LIST_OF_STRING("x-webclient-return-except-list-of-string", ExtensionLevel.OPERATION, "Specifies if method for specific operation should return the type except List<String> and Set<String>(ex: return type expect the `Mono<List<String>>/Flux<List<String>>` and `Mono<Set<String>>/Flux<Set<String>>`)", "false"),
+    X_REACTIVE_RETURN_EXCEPT_LIST_OF_STRING("x-reactive-return-except-list-of-string", ExtensionLevel.OPERATION, "Specifies if method for specific operation should return the type except List<String> and Set<String>(ex: return type expect the `Mono<List<String>>/Flux<List<String>>` and `Mono<Set<String>>/Flux<Set<String>>`)", "false"),
     X_TAGS("x-tags", ExtensionLevel.OPERATION, "Specify multiple swagger tags for operation", null),
     X_ACCEPTS("x-accepts", ExtensionLevel.OPERATION, "Specify custom value for 'Accept' header for operation", null),
     X_CONTENT_TYPE("x-content-type", ExtensionLevel.OPERATION, "Specify custom value for 'Content-Type' header for operation", null),
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/SpringCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/SpringCodegen.java
index 2104047f125c..a8f1c0899b4f 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/SpringCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/SpringCodegen.java
@@ -1026,6 +1026,12 @@ public void setIsVoid(boolean isVoid) {
 
                 prepareVersioningParameters(ops);
                 handleImplicitHeaders(operation);
+
+                if (isLibrary(SPRING_HTTP_INTERFACE) || isLibrary(SPRING_BOOT)) {
+                    if (operation.isArray && "string".equalsIgnoreCase(operation.returnBaseType)) {
+                        operation.vendorExtensions.put(VendorExtension.X_REACTIVE_RETURN_EXCEPT_LIST_OF_STRING.getName(), true);
+                    }
+                }
             }
             // The tag for the controller is the first tag of the first operation
             final CodegenOperation firstOperation = ops.get(0);
diff --git a/modules/openapi-generator/src/main/resources/JavaSpring/responseType.mustache b/modules/openapi-generator/src/main/resources/JavaSpring/responseType.mustache
index a25da6310b56..378585299a50 100644
--- a/modules/openapi-generator/src/main/resources/JavaSpring/responseType.mustache
+++ b/modules/openapi-generator/src/main/resources/JavaSpring/responseType.mustache
@@ -1 +1 @@
-{{^vendorExtensions.x-sse}}{{#reactive}}{{#useResponseEntity}}Mono<ResponseEntity<{{#isArray}}Flux<{{/isArray}}{{>returnTypes}}{{#isArray}}>{{/isArray}}>>{{/useResponseEntity}}{{^useResponseEntity}}{{#isArray}}Flux{{/isArray}}{{^isArray}}Mono{{/isArray}}<{{>returnTypes}}>{{/useResponseEntity}}{{/reactive}}{{^reactive}}{{#responseWrapper}}{{.}}<{{/responseWrapper}}{{#useResponseEntity}}ResponseEntity<{{/useResponseEntity}}{{>returnTypes}}{{#useResponseEntity}}>{{/useResponseEntity}}{{#responseWrapper}}>{{/responseWrapper}}{{/reactive}}{{/vendorExtensions.x-sse}}{{#vendorExtensions.x-sse}}{{#isArray}}Flux{{/isArray}}{{^isArray}}Mono{{/isArray}}<{{>returnTypes}}>{{/vendorExtensions.x-sse}}
\ No newline at end of file
+{{^vendorExtensions.x-sse}}{{#reactive}}{{#useResponseEntity}}{{#vendorExtensions.x-reactive-return-except-list-of-string}}Mono<ResponseEntity<{{{returnContainer}}}<{{>returnTypes}}>>>{{/vendorExtensions.x-reactive-return-except-list-of-string}}{{^vendorExtensions.x-reactive-return-except-list-of-string}}Mono<ResponseEntity<{{#isArray}}Flux<{{/isArray}}{{>returnTypes}}{{#isArray}}>{{/isArray}}>>{{/vendorExtensions.x-reactive-return-except-list-of-string}}{{/useResponseEntity}}{{^useResponseEntity}}{{#vendorExtensions.x-reactive-return-except-list-of-string}}Mono<{{{returnContainer}}}<{{>returnTypes}}>>{{/vendorExtensions.x-reactive-return-except-list-of-string}}{{^vendorExtensions.x-reactive-return-except-list-of-string}}{{#isArray}}Flux{{/isArray}}{{^isArray}}Mono{{/isArray}}<{{>returnTypes}}>{{/vendorExtensions.x-reactive-return-except-list-of-string}}{{/useResponseEntity}}{{/reactive}}{{^reactive}}{{#responseWrapper}}{{.}}<{{/responseWrapper}}{{#useResponseEntity}}ResponseEntity<{{/useResponseEntity}}{{>returnTypes}}{{#useResponseEntity}}>{{/useResponseEntity}}{{#responseWrapper}}>{{/responseWrapper}}{{/reactive}}{{/vendorExtensions.x-sse}}{{#vendorExtensions.x-sse}}{{#vendorExtensions.x-reactive-return-except-list-of-string}}{{{returnContainer}}}<{{>returnTypes}}>{{/vendorExtensions.x-reactive-return-except-list-of-string}}{{^vendorExtensions.x-reactive-return-except-list-of-string}}{{#isArray}}Flux{{/isArray}}{{^isArray}}Mono{{/isArray}}<{{>returnTypes}}>{{/vendorExtensions.x-reactive-return-except-list-of-string}}{{/vendorExtensions.x-sse}}
\ No newline at end of file
diff --git a/modules/openapi-generator/src/test/java/org/openapitools/codegen/java/spring/SpringCodegenTest.java b/modules/openapi-generator/src/test/java/org/openapitools/codegen/java/spring/SpringCodegenTest.java
index 14b541cf9f0c..7d14092792d5 100644
--- a/modules/openapi-generator/src/test/java/org/openapitools/codegen/java/spring/SpringCodegenTest.java
+++ b/modules/openapi-generator/src/test/java/org/openapitools/codegen/java/spring/SpringCodegenTest.java
@@ -8132,4 +8132,138 @@ void schemaMappingWithNullableAllOfRendersNullableJavaProperty() throws IOExcept
         JavaFileAssert.assertThat(files.get("MyObject.java"))
                 .assertProperty("optionalRef").withType("JsonNullable<com.example.ExternalModel>");
     }
+
+    @Test
+    public void testReactiveSpringSupportListOfStringReturnType() throws IOException {
+        Map<String, Object> properties = new HashMap<>();
+        properties.put(CodegenConstants.API_PACKAGE, "xyz.abcdef.api");
+        properties.put(SpringCodegen.REACTIVE, true);
+
+
+        File output = Files.createTempDirectory("test").toFile();
+        output.deleteOnExit();
+
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+                .setGeneratorName("spring")
+                .setLibrary(SPRING_BOOT)
+                .setAdditionalProperties(properties)
+                .setInputSpec("src/test/resources/bugs/issue_7118.yaml")
+                .setOutputDir(output.getAbsolutePath().replace("\\", "/"));
+
+        DefaultGenerator generator = new DefaultGenerator();
+        List<File> files = generator.opts(configurator.toClientOptInput()).generate();
+        files.forEach(File::deleteOnExit);
+
+        validateJavaSourceFiles(files);
+
+        Path userApi = Paths.get(output + "/src/main/java/xyz/abcdef/api/UsersApi.java");
+
+        TestUtils.assertFileContains(userApi,
+                // list of string
+                "Mono<ResponseEntity<List<String>>> getUserIdList",
+                // set of string
+                "Mono<ResponseEntity<Set<String>>> getUserIdSet"
+        );
+    }
+
+    @Test
+    public void testReactiveSpringSupportListOfStringReturnTypeNoResponseEntity() throws IOException {
+        Map<String, Object> properties = new HashMap<>();
+        properties.put(CodegenConstants.API_PACKAGE, "xyz.abcdef.api");
+        properties.put(SpringCodegen.REACTIVE, true);
+        properties.put(USE_RESPONSE_ENTITY, false);
+
+
+        File output = Files.createTempDirectory("test").toFile();
+        output.deleteOnExit();
+
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+                .setGeneratorName("spring")
+                .setLibrary(SPRING_BOOT)
+                .setAdditionalProperties(properties)
+                .setInputSpec("src/test/resources/bugs/issue_7118.yaml")
+                .setOutputDir(output.getAbsolutePath().replace("\\", "/"));
+
+        DefaultGenerator generator = new DefaultGenerator();
+        List<File> files = generator.opts(configurator.toClientOptInput()).generate();
+        files.forEach(File::deleteOnExit);
+
+        validateJavaSourceFiles(files);
+
+        Path userApi = Paths.get(output + "/src/main/java/xyz/abcdef/api/UsersApi.java");
+
+        TestUtils.assertFileContains(userApi,
+                // list of string
+                "Mono<List<String>> getUserIdList",
+                // set of string
+                "Mono<Set<String>> getUserIdSet"
+        );
+    }
+
+    @Test
+    public void testReactiveSpringHttpInterfaceSupportListOfStringReturnType() throws IOException {
+        Map<String, Object> properties = new HashMap<>();
+        properties.put(CodegenConstants.API_PACKAGE, "xyz.abcdef.api");
+        properties.put(SpringCodegen.REACTIVE, true);
+
+
+        File output = Files.createTempDirectory("test").toFile();
+        output.deleteOnExit();
+
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+                .setGeneratorName("spring")
+                .setLibrary(SPRING_HTTP_INTERFACE)
+                .setAdditionalProperties(properties)
+                .setInputSpec("src/test/resources/bugs/issue_7118.yaml")
+                .setOutputDir(output.getAbsolutePath().replace("\\", "/"));
+
+        DefaultGenerator generator = new DefaultGenerator();
+        List<File> files = generator.opts(configurator.toClientOptInput()).generate();
+        files.forEach(File::deleteOnExit);
+
+        validateJavaSourceFiles(files);
+
+        Path userApi = Paths.get(output + "/src/main/java/xyz/abcdef/api/UsersApi.java");
+
+        TestUtils.assertFileContains(userApi,
+                // list of string
+                "Mono<ResponseEntity<List<String>>> getUserIdList",
+                // set of string
+                "Mono<ResponseEntity<Set<String>>> getUserIdSet"
+        );
+    }
+
+    @Test
+    public void testReactiveSpringHttpInterfaceSupportListOfStringReturnTypeNoResponseEntity() throws IOException {
+        Map<String, Object> properties = new HashMap<>();
+        properties.put(CodegenConstants.API_PACKAGE, "xyz.abcdef.api");
+        properties.put(SpringCodegen.REACTIVE, true);
+        properties.put(USE_RESPONSE_ENTITY, false);
+
+
+        File output = Files.createTempDirectory("test").toFile();
+        output.deleteOnExit();
+
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+                .setGeneratorName("spring")
+                .setLibrary(SPRING_HTTP_INTERFACE)
+                .setAdditionalProperties(properties)
+                .setInputSpec("src/test/resources/bugs/issue_7118.yaml")
+                .setOutputDir(output.getAbsolutePath().replace("\\", "/"));
+
+        DefaultGenerator generator = new DefaultGenerator();
+        List<File> files = generator.opts(configurator.toClientOptInput()).generate();
+        files.forEach(File::deleteOnExit);
+
+        validateJavaSourceFiles(files);
+
+        Path userApi = Paths.get(output + "/src/main/java/xyz/abcdef/api/UsersApi.java");
+
+        TestUtils.assertFileContains(userApi,
+                // list of string
+                "Mono<List<String>> getUserIdList",
+                // set of string
+                "Mono<Set<String>> getUserIdSet"
+        );
+    }
 }
\ No newline at end of file