diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/api.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/api.mustache
index cdd2125331f..16b996ff0bd 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/api.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/resttemplate/api.mustache
@@ -126,10 +126,12 @@ public class {{classname}} {
         final MultiValueMap<String, String> localVarCookieParams = new LinkedMultiValueMap<String, String>();
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();{{#hasQueryParams}}
 
-{{#queryParams}}{{#isExplode}}{{#hasVars}}{{#vars}}        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap({{#collectionFormat}}ApiClient.CollectionFormat.valueOf("{{{.}}}".toUpperCase(Locale.ROOT)){{/collectionFormat}}{{^collectionFormat}}null{{/collectionFormat}}, "{{baseName}}", {{paramName}}.{{getter}}()));
-{{/vars}}{{/hasVars}}{{^hasVars}}        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap({{#collectionFormat}}ApiClient.CollectionFormat.valueOf("{{{.}}}".toUpperCase(Locale.ROOT)){{/collectionFormat}}{{^collectionFormat}}null{{/collectionFormat}}, "{{baseName}}", {{paramName}}));
-{{/hasVars}}{{/isExplode}}{{^isExplode}}        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap({{#collectionFormat}}ApiClient.CollectionFormat.valueOf("{{{.}}}".toUpperCase(Locale.ROOT)){{/collectionFormat}}{{^collectionFormat}}null{{/collectionFormat}}, "{{baseName}}", {{paramName}}));
-{{/isExplode}}{{/queryParams}}{{/hasQueryParams}}{{#hasHeaderParams}}
+        {{#queryParams}}{{#isExplode}}{{#hasVars}}
+        if ({{paramName}} != null) {
+        {{#vars}}    localVarQueryParams.putAll(apiClient.parameterToMultiValueMap({{#collectionFormat}}ApiClient.CollectionFormat.valueOf("{{{.}}}".toUpperCase(Locale.ROOT)){{/collectionFormat}}{{^collectionFormat}}null{{/collectionFormat}}, "{{baseName}}", {{paramName}}.{{getter}}()));
+        {{/vars}}}{{/hasVars}}{{^hasVars}}localVarQueryParams.putAll(apiClient.parameterToMultiValueMap({{#collectionFormat}}ApiClient.CollectionFormat.valueOf("{{{.}}}".toUpperCase(Locale.ROOT)){{/collectionFormat}}{{^collectionFormat}}null{{/collectionFormat}}, "{{baseName}}", {{paramName}}));
+        {{/hasVars}}{{/isExplode}}{{^isExplode}}localVarQueryParams.putAll(apiClient.parameterToMultiValueMap({{#collectionFormat}}ApiClient.CollectionFormat.valueOf("{{{.}}}".toUpperCase(Locale.ROOT)){{/collectionFormat}}{{^collectionFormat}}null{{/collectionFormat}}, "{{baseName}}", {{paramName}}));
+        {{/isExplode}}{{/queryParams}}{{/hasQueryParams}}{{#hasHeaderParams}}
 
         {{#headerParams}}if ({{paramName}} != null)
         localVarHeaderParams.add("{{baseName}}", apiClient.parameterToString({{paramName}}));{{^-last}}
diff --git a/modules/openapi-generator/src/test/java/org/openapitools/codegen/java/JavaClientCodegenTest.java b/modules/openapi-generator/src/test/java/org/openapitools/codegen/java/JavaClientCodegenTest.java
index a14984331ea..b76e29e36b7 100644
--- a/modules/openapi-generator/src/test/java/org/openapitools/codegen/java/JavaClientCodegenTest.java
+++ b/modules/openapi-generator/src/test/java/org/openapitools/codegen/java/JavaClientCodegenTest.java
@@ -2938,4 +2938,32 @@ public class JavaClientCodegenTest {
         assertNotNull(apiFile);
         JavaFileAssert.assertThat(apiFile).fileContains(expectedInnerEnumLines);
     }
+
+    @Test
+    public void testQueryParamsExploded_whenQueryParamIsNull() throws IOException {
+
+        Map<String, Object> properties = new HashMap<>();
+        properties.put(CodegenConstants.API_PACKAGE, "xyz.abcdef.api");
+
+        File output = Files.createTempDirectory("test").toFile();
+        output.deleteOnExit();
+
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+                .setGeneratorName("java")
+                .setLibrary(JavaClientCodegen.RESTTEMPLATE)
+                .setAdditionalProperties(properties)
+                .setInputSpec("src/test/resources/3_0/issue_17555.yaml")
+                .setOutputDir(output.getAbsolutePath().replace("\\", "/"));
+
+
+        DefaultGenerator generator = new DefaultGenerator();
+        List<File> files = generator.opts(configurator.toClientOptInput()).generate();
+        files.forEach(File::deleteOnExit);
+
+        validateJavaSourceFiles(files);
+
+
+        Path petApi = Paths.get(output + "/src/main/java/xyz/abcdef/api/DepartmentApi.java");
+        TestUtils.assertFileContains(petApi, "if (filter != null) {");
+    }
 }
diff --git a/modules/openapi-generator/src/test/resources/3_0/issue_17555.yaml b/modules/openapi-generator/src/test/resources/3_0/issue_17555.yaml
new file mode 100644
index 00000000000..158e3486e40
--- /dev/null
+++ b/modules/openapi-generator/src/test/resources/3_0/issue_17555.yaml
@@ -0,0 +1,51 @@
+openapi: 3.0.0
+info:
+  description: My description
+  version: 1.0.0
+  title: OpenAPI Petstore
+  license:
+    name: Apache-2.0
+    url: 'https://www.apache.org/licenses/LICENSE-2.0.html'
+tags:
+  - name: department
+    description: Everything about your Department
+paths:
+  /api/department/{departmentId}/teams:
+    get:
+      tags:
+        - Department
+      summary: Find Department Teams
+      operationId: findDepartmentTeams
+      description: Find Department Teams
+      parameters:
+        - $ref: '#/components/parameters/departmentIdParam'
+        - $ref: '#/components/parameters/teamQueryParam'
+      responses:
+        '200':
+          description: OK
+components:
+  schemas:
+    TeamCriteriaDTO:
+      type: object
+      title: TeamCriteriaDTO
+      properties:
+        key:
+          type: string
+        name:
+          type: string
+  parameters:
+    departmentIdParam:
+      name: departmentId
+      in: path
+      description: ID of the department to search
+      required: true
+      schema:
+        type: string
+    teamQueryParam:
+      name: filter
+      in: query
+      description: Fetch teams query
+      required: false
+      allowEmptyValue: true
+      schema:
+        $ref: '#/components/schemas/TeamCriteriaDTO'
\ No newline at end of file
diff --git a/samples/client/echo_api/java/resttemplate/src/main/java/org/openapitools/client/api/QueryApi.java b/samples/client/echo_api/java/resttemplate/src/main/java/org/openapitools/client/api/QueryApi.java
index 99b0206a801..d30cd1b058e 100644
--- a/samples/client/echo_api/java/resttemplate/src/main/java/org/openapitools/client/api/QueryApi.java
+++ b/samples/client/echo_api/java/resttemplate/src/main/java/org/openapitools/client/api/QueryApi.java
@@ -84,7 +84,7 @@ public class QueryApi {
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "enum_nonref_string_query", enumNonrefStringQuery));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "enum_ref_string_query", enumRefStringQuery));
-
+        
 
         final String[] localVarAccepts = { 
             "text/plain"
@@ -134,7 +134,7 @@ public class QueryApi {
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "datetime_query", datetimeQuery));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "date_query", dateQuery));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "string_query", stringQuery));
-
+        
 
         final String[] localVarAccepts = { 
             "text/plain"
@@ -184,7 +184,7 @@ public class QueryApi {
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "integer_query", integerQuery));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "boolean_query", booleanQuery));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "string_query", stringQuery));
-
+        
 
         final String[] localVarAccepts = { 
             "text/plain"
@@ -227,13 +227,15 @@ public class QueryApi {
         final MultiValueMap<String, String> localVarCookieParams = new LinkedMultiValueMap<String, String>();
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
-        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "id", queryObject.getId()));
-        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "name", queryObject.getName()));
-        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "category", queryObject.getCategory()));
-        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "photoUrls", queryObject.getPhotoUrls()));
-        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "tags", queryObject.getTags()));
-        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "status", queryObject.getStatus()));
-
+        
+        if (queryObject != null) {
+            localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "id", queryObject.getId()));
+            localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "name", queryObject.getName()));
+            localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "category", queryObject.getCategory()));
+            localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "photoUrls", queryObject.getPhotoUrls()));
+            localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "tags", queryObject.getTags()));
+            localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "status", queryObject.getStatus()));
+        }
 
         final String[] localVarAccepts = { 
             "text/plain"
@@ -277,7 +279,7 @@ public class QueryApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "query_object", queryObject));
-
+        
 
         final String[] localVarAccepts = { 
             "text/plain"
@@ -320,8 +322,10 @@ public class QueryApi {
         final MultiValueMap<String, String> localVarCookieParams = new LinkedMultiValueMap<String, String>();
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
-        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "values", queryObject.getValues()));
-
+        
+        if (queryObject != null) {
+            localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "values", queryObject.getValues()));
+        }
 
         final String[] localVarAccepts = { 
             "text/plain"
@@ -364,13 +368,15 @@ public class QueryApi {
         final MultiValueMap<String, String> localVarCookieParams = new LinkedMultiValueMap<String, String>();
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
-        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "id", queryObject.getId()));
-        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "name", queryObject.getName()));
-        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "category", queryObject.getCategory()));
-        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "photoUrls", queryObject.getPhotoUrls()));
-        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "tags", queryObject.getTags()));
-        localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "status", queryObject.getStatus()));
-
+        
+        if (queryObject != null) {
+            localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "id", queryObject.getId()));
+            localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "name", queryObject.getName()));
+            localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "category", queryObject.getCategory()));
+            localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "photoUrls", queryObject.getPhotoUrls()));
+            localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "tags", queryObject.getTags()));
+            localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "status", queryObject.getStatus()));
+        }
 
         final String[] localVarAccepts = { 
             "text/plain"
@@ -414,7 +420,7 @@ public class QueryApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "query_object", queryObject));
-
+        
 
         final String[] localVarAccepts = { 
             "text/plain"
diff --git a/samples/client/echo_api/java/resttemplate/src/test/java/org/openapitools/client/CustomTest.java b/samples/client/echo_api/java/resttemplate/src/test/java/org/openapitools/client/CustomTest.java
index 0b3827baf4f..fc98c24a128 100644
--- a/samples/client/echo_api/java/resttemplate/src/test/java/org/openapitools/client/CustomTest.java
+++ b/samples/client/echo_api/java/resttemplate/src/test/java/org/openapitools/client/CustomTest.java
@@ -14,13 +14,15 @@
 package org.openapitools.client;
 
 import org.junit.Assert;
-import org.openapitools.client.api.*;
-import org.openapitools.client.model.*;
 import org.junit.Test;
-import org.junit.Ignore;
+import org.openapitools.client.api.BodyApi;
+import org.openapitools.client.api.QueryApi;
+import org.openapitools.client.model.Category;
+import org.openapitools.client.model.Pet;
 
-import java.io.IOException;
-import java.util.*;
+import java.util.Arrays;
+
+import static org.junit.Assert.assertNotNull;
 
 
 /**
@@ -43,7 +45,7 @@ public class CustomTest {
                 photoUrls(Arrays.asList(new String[]{"http://a.com", "http://b.com"})).category(new Category().id(987L).name("new category"));
 
         Pet p = bodyApi.testEchoBodyPet(pet);
-        Assert.assertNotNull(p);
+        assertNotNull(p);
         Assert.assertEquals("Hello World", p.getName());
         Assert.assertEquals(Long.valueOf(12345L), p.getId());
 
@@ -51,4 +53,9 @@ public class CustomTest {
         Pet p2 = bodyApi.testEchoBodyPet(null);
         Assert.assertNull(p2);
     }
+    
+    @Test
+    public void testQueryParamsExploded_whenQueryParamIsNull() {
+        assertNotNull(api.testQueryStyleFormExplodeTrueObject(null));
+    }
 }
diff --git a/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/api/PetApi.java b/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/api/PetApi.java
index 75ba2cf8eed..732527c10e5 100644
--- a/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/api/PetApi.java
+++ b/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/api/PetApi.java
@@ -185,7 +185,7 @@ public class PetApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "status", status));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
@@ -240,7 +240,7 @@ public class PetApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "tags", tags));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
diff --git a/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/api/UserApi.java b/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/api/UserApi.java
index 3853d9f8eb0..46b2a0835cd 100644
--- a/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/api/UserApi.java
+++ b/samples/client/petstore/java/resttemplate-jakarta/src/main/java/org/openapitools/client/api/UserApi.java
@@ -327,7 +327,7 @@ public class UserApi {
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "username", username));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "password", password));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
diff --git a/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/api/PetApi.java b/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/api/PetApi.java
index c83dcced6b8..5690a4560a0 100644
--- a/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/api/PetApi.java
+++ b/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/api/PetApi.java
@@ -185,7 +185,7 @@ public class PetApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "status", status));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
@@ -240,7 +240,7 @@ public class PetApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "tags", tags));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
diff --git a/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/api/UserApi.java b/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/api/UserApi.java
index 61837f12d6e..9c958bd5e8a 100644
--- a/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/api/UserApi.java
+++ b/samples/client/petstore/java/resttemplate-swagger1/src/main/java/org/openapitools/client/api/UserApi.java
@@ -327,7 +327,7 @@ public class UserApi {
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "username", username));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "password", password));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
diff --git a/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/api/PetApi.java b/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/api/PetApi.java
index c83dcced6b8..5690a4560a0 100644
--- a/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/api/PetApi.java
+++ b/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/api/PetApi.java
@@ -185,7 +185,7 @@ public class PetApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "status", status));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
@@ -240,7 +240,7 @@ public class PetApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "tags", tags));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
diff --git a/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/api/UserApi.java b/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/api/UserApi.java
index 61837f12d6e..9c958bd5e8a 100644
--- a/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/api/UserApi.java
+++ b/samples/client/petstore/java/resttemplate-swagger2/src/main/java/org/openapitools/client/api/UserApi.java
@@ -327,7 +327,7 @@ public class UserApi {
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "username", username));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "password", password));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/FakeApi.java
index daad5f9d7fb..88425e86cea 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -175,7 +175,7 @@ public class FakeApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "query_1", query1));
-
+        
 
         if (header1 != null)
         localVarHeaderParams.add("header_1", apiClient.parameterToString(header1));
@@ -588,7 +588,7 @@ public class FakeApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "query", query));
-
+        
 
         final String[] localVarAccepts = {  };
         final List<MediaType> localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
@@ -818,7 +818,7 @@ public class FakeApi {
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "enum_query_integer", enumQueryInteger));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "enum_query_double", enumQueryDouble));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("multi".toUpperCase(Locale.ROOT)), "enum_query_model_array", enumQueryModelArray));
-
+        
 
         if (enumHeaderStringArray != null)
         localVarHeaderParams.add("enum_header_string_array", apiClient.parameterToString(enumHeaderStringArray));
@@ -899,7 +899,7 @@ public class FakeApi {
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "required_int64_group", requiredInt64Group));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "string_group", stringGroup));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "int64_group", int64Group));
-
+        
 
         if (requiredBooleanGroup != null)
         localVarHeaderParams.add("required_boolean_group", apiClient.parameterToString(requiredBooleanGroup));
@@ -1185,7 +1185,7 @@ public class FakeApi {
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("multi".toUpperCase(Locale.ROOT)), "context", context));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "language", language));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "allowEmpty", allowEmpty));
-
+        
 
         final String[] localVarAccepts = {  };
         final List<MediaType> localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/PetApi.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/PetApi.java
index 75b0825e2e5..59ee44d69d1 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/PetApi.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/PetApi.java
@@ -185,7 +185,7 @@ public class PetApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "status", status));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
@@ -240,7 +240,7 @@ public class PetApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "tags", tags));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
diff --git a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/UserApi.java b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/UserApi.java
index 72054f302d6..dabcb91b76e 100644
--- a/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/UserApi.java
+++ b/samples/client/petstore/java/resttemplate-withXml/src/main/java/org/openapitools/client/api/UserApi.java
@@ -327,7 +327,7 @@ public class UserApi {
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "username", username));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "password", password));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/FakeApi.java
index daad5f9d7fb..88425e86cea 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -175,7 +175,7 @@ public class FakeApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "query_1", query1));
-
+        
 
         if (header1 != null)
         localVarHeaderParams.add("header_1", apiClient.parameterToString(header1));
@@ -588,7 +588,7 @@ public class FakeApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "query", query));
-
+        
 
         final String[] localVarAccepts = {  };
         final List<MediaType> localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
@@ -818,7 +818,7 @@ public class FakeApi {
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "enum_query_integer", enumQueryInteger));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "enum_query_double", enumQueryDouble));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("multi".toUpperCase(Locale.ROOT)), "enum_query_model_array", enumQueryModelArray));
-
+        
 
         if (enumHeaderStringArray != null)
         localVarHeaderParams.add("enum_header_string_array", apiClient.parameterToString(enumHeaderStringArray));
@@ -899,7 +899,7 @@ public class FakeApi {
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "required_int64_group", requiredInt64Group));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "string_group", stringGroup));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "int64_group", int64Group));
-
+        
 
         if (requiredBooleanGroup != null)
         localVarHeaderParams.add("required_boolean_group", apiClient.parameterToString(requiredBooleanGroup));
@@ -1185,7 +1185,7 @@ public class FakeApi {
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("multi".toUpperCase(Locale.ROOT)), "context", context));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "language", language));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "allowEmpty", allowEmpty));
-
+        
 
         final String[] localVarAccepts = {  };
         final List<MediaType> localVarAccept = apiClient.selectHeaderAccept(localVarAccepts);
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/PetApi.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/PetApi.java
index 75b0825e2e5..59ee44d69d1 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/PetApi.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/PetApi.java
@@ -185,7 +185,7 @@ public class PetApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "status", status));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
@@ -240,7 +240,7 @@ public class PetApi {
         final MultiValueMap<String, Object> localVarFormParams = new LinkedMultiValueMap<String, Object>();
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(ApiClient.CollectionFormat.valueOf("csv".toUpperCase(Locale.ROOT)), "tags", tags));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"
diff --git a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/UserApi.java b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/UserApi.java
index 72054f302d6..dabcb91b76e 100644
--- a/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/UserApi.java
+++ b/samples/client/petstore/java/resttemplate/src/main/java/org/openapitools/client/api/UserApi.java
@@ -327,7 +327,7 @@ public class UserApi {
 
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "username", username));
         localVarQueryParams.putAll(apiClient.parameterToMultiValueMap(null, "password", password));
-
+        
 
         final String[] localVarAccepts = { 
             "application/xml", "application/json"