//初始化

        List<Map<String, Object>> products = new ArrayList<Map<String,Object>>();

        //也可以这样初始化List<Map<String, Object>> products = null

        //初始Map<String,Object>

        Map<String,Object> product01 = null;

        product01.put("Parameter01", "Key1");        

        Map<String,Object> product02 = null;

        String parameter02 = "Parameter02";

        String key2 = "theContentOfKey2";

        product02.put(parameter02, key2);

        //一个一个添加

        products.add(product01);

        products.add(product02);

        //从Service中获取

        List<Map<String, Object>> productsAddition = productService.getProduct(); 

        //遍历添加

        for(Map<String, Object> product: productsAddition){

            products.add(product);

        }

          //初始化

         List<Map<String, Object>> products =  null;

         //获取List元素

         products = productService.getProduct(); 

         //使用迭代删除

         Iterator<Map<String, Object>> productsIterator = products.iterator();

         while (productsIterator.hasNext()) {

           //删除特定元素

           Map<String, Object> product = productsIterator.next();

           if("product01".equals(product.get("productName"))){

                  productsIterator.remove();

           }

           if("product02".equals(product.get("productName"))){

                productsIterator.remove();

           }

        }