Through Postman Api send data through JSON and create simple product in Magento2

  Data Written in Postman Api


[ {
    "product": {
      "productenable":1,
        "attribute_set_id": 4,
        "name": " Product new10",
        "sku": "new108",
        "price": 200.00,
        "specialprice":150,
        "special_from_date":"09/15/2017",
        "special_to_date":"09/15/2018",
        "tax_class":0,
        "quantity":100,
        "status": 1,
        "weight":10,
        "visibility":4,
        "category":{
          "0":41,
          "1":50
        },
        "manufacture_country":"Germany",
        "type_id": "simple",
     
        "productinwebsite":[1],
        "recipes":"product recipesssssss",  ///////////attributes///////////////////
        "allergene":"product recipesssss",   ///////////attributes///////////////////
        "ingredient":"product recipessss",    ///////////attributes///////////////////
        "ingredients":"product recipesss",     ///////////attributes///////////////////
        "description": "A Very Simple Product", 
        "short_description": "A Very Simple Product" 
       
       
       
       
       
    }
} ]


Controller of Magento2 to Get Post Data

[<?php
/**
 *
 * Copyright © 2015 Bluethinkcommerce. All rights reserved.
 */
namespace Bluethink\Erp\Controller\Index;

class Createproduct extends \Magento\Framework\App\Action\Action
{

/**
     * @var \Magento\Framework\App\Cache\TypeListInterface
     */
    protected $_cacheTypeList;

    /**
     * @var \Magento\Framework\App\Cache\StateInterface
     */
    protected $_cacheState;

    /**
     * @var \Magento\Framework\App\Cache\Frontend\Pool
     */
    protected $_cacheFrontendPool;

    /**
     * @var \Magento\Framework\View\Result\PageFactory
     */
    protected $resultPageFactory;

    /**
     * @param Action\Context $context
     * @param \Magento\Framework\App\Cache\TypeListInterface $cacheTypeList
     * @param \Magento\Framework\App\Cache\StateInterface $cacheState
     * @param \Magento\Framework\App\Cache\Frontend\Pool $cacheFrontendPool
     * @param \Magento\Framework\View\Result\PageFactory $resultPageFactory
     */
    public function __construct(
       \Magento\Framework\App\Action\Context $context,
        \Magento\Framework\App\Cache\TypeListInterface $cacheTypeList,
        \Magento\Framework\App\Cache\StateInterface $cacheState,
        \Magento\Framework\App\Cache\Frontend\Pool $cacheFrontendPool,
        \Magento\Framework\View\Result\PageFactory $resultPageFactory
    ) {
        parent::__construct($context);
        $this->_cacheTypeList = $cacheTypeList;
        $this->_cacheState = $cacheState;
        $this->_cacheFrontendPool = $cacheFrontendPool;
        $this->resultPageFactory = $resultPageFactory;
    }

    /**
     * Flush cache storage
     *
     */
    public function execute()
    {
        $data = json_decode( file_get_contents('php://input') );
        //var_dump($data);
        //echo "<pre>"; print_r($data); echo "</pre>";
       /* echo "<pre>"; print_r($data->product->category); echo "</pre>";
         echo $data->product->sku;*/
       
        //$objectManager = \Magento\Framework\App\ObjectManager::getInstance(); // instance of object manager
        $product = $this->_objectManager->create('\Magento\Catalog\Model\Product');
        $product->setSku($data->product->sku); // Set your sku here
    /*     echo "<pre>";
         print_r($product->getData());
         */ //exit();
       
        $product->setName($data->product->name); // Name of Product
        $product->setAttributeSetId($data->product->attribute_set_id); // Attribute set id
        $product->setStatus($data->product->status); // Status on product enabled/ disabled 1/0
        $product->setWeight($data->product->weight); // weight of product
        $product->setVisibility($data->product->visibility); // visibilty of product (catalog / search / catalog, search / Not visible individually)
        $product->setTaxClassId($data->product->tax_class); // Tax class id
        $product->setTypeId($data->product->type_id); // type of product (simple/virtual/downloadable/configurable)
        $product->setPrice($data->product->price); // price of product
        $product->setCustomAttributes(array(
                'special_from_date' => $data->product->special_from_date, //special price date from
                'special_to_date' => $data->product->special_to_date, //special price date to
                'special_price' => $data->product->specialprice, //special price
            ));
     
        $product->setDescription($data->product->description);//description   
        $product->setAllergene($data->product->allergene);//attribute
        $product->setIngredient($data->product->ingredient);//attribute
        $product->setIngredients($data->product->ingredients); //attribute
        $product->setRecipes($data->product->recipes);  //attribute
        /*echo "<pre>";
         print_r($product->getData());
         */ //exit();
        $product->setShortDescription($data->product->short_description); //Short Description
        $product->setcategoryIds($data->product->category); //Categoryid
        $product->setStockData( array(
                            'use_config_manage_stock' => 0,
                            'manage_stock' => 1,
                            'is_in_stock' => 1,
                            'qty' =>$data->product->quantity
                        )); //quantity
        $product->setWebsiteIds($data->product->productinwebsite);
        //$product->setWebsiteIds($data->product->productinwebsite); //websiteid
       
                               
                         
        $product->save();
        echo "Entity Id : ====> ".$product->getEntityId();
        // Adding Image to product
        /*$imagePath = "sample.jpg"; // path of the image
        $product->addImageToMediaGallery($imagePath, array('image', 'small_image', 'thumbnail'), false, false);
        $product->save();*/
       
        // Adding Custom option to product
        /*$options = array(
                        array(
                            "sort_order"    => 1,
                            "title"         => "Custom Option 1",
                            "price_type"    => "fixed",
                            "price"         => "10",
                            "type"          => "field",
                            "is_require"   => 0
                        ),
                        array(
                            "sort_order"    => 2,
                            "title"         => "Custom Option 2",
                            "price_type"    => "fixed",
                            "price"         => "20",
                            "type"          => "field",
                            "is_require"   => 0
                        )
                    );
        foreach ($options as $arrayOption) {
            $product->setHasOptions(1);
            $product->getResource()->save($product);
            $option = $objectManager->create('\Magento\Catalog\Model\Product\Option')
                            ->setProductId($product->getId())
                            ->setStoreId($product->getStoreId())
                            ->addData($arrayOption);
            $option->save();
            $product->addOption($option);
        }*/
       
    }
}
]