[Java][native][apache-httpclient] Update toUrlQueryString to support form style for object (#14478)

* update toUrlQueryString

* add new files

* minor bug fixes

* support object in query parameter - java apache httpclient

* rename variable - java native

* update samples

* fix try catch

samples/client/echo_api/java/feign-gson/api/openapi.yaml

@@ -124,6 +124,29 @@ paths:
       tags:
       - query
       x-accepts: text/plain
+  /query/style_form/explode_true/object/allOf:
+    get:
+      description: Test query parameter(s)
+      operationId: test/query/style_form/explode_true/object/allOf
+      parameters:
+      - explode: true
+        in: query
+        name: query_object
+        required: false
+        schema:
+          $ref: '#/components/schemas/DataQuery'
+        style: form
+      responses:
+        "200":
+          content:
+            text/plain:
+              schema:
+                type: string
+          description: Successful operation
+      summary: Test query parameter(s)
+      tags:
+      - query
+      x-accepts: text/plain
   /query/style_deepObject/explode_true/object:
     get:
       description: Test query parameter(s)
@@ -285,6 +308,29 @@ components:
         color:
           type: string
       type: object
+    Query:
+      properties:
+        id:
+          description: Query
+          format: int64
+          type: integer
+        outcomes:
+          default:
+          - SUCCESS
+          - FAILURE
+          items:
+            enum:
+            - SUCCESS
+            - FAILURE
+            - SKIPPED
+            type: string
+          type: array
+      type: object
+      x-parent: true
+    DataQuery:
+      allOf:
+      - $ref: '#/components/schemas/DataQuery_allOf'
+      - $ref: '#/components/schemas/Query'
     test_query_style_form_explode_true_array_string_query_object_parameter:
       properties:
         values:
@@ -296,4 +342,19 @@ components:
       allOf:
       - $ref: '#/components/schemas/Bird'
       - $ref: '#/components/schemas/Category'
+    DataQuery_allOf:
+      properties:
+        suffix:
+          description: test suffix
+          type: string
+        text:
+          description: Some text containing white spaces
+          example: Some text
+          type: string
+        date:
+          description: A date
+          format: date-time
+          type: string
+      type: object
+      example: null