系统学习magento二次开发，推荐小册：《Magento中文全栈二次开发 》

在Magento 2中舍入所有价格的步骤：

第1步： 首先， 在我们的扩展名中，在下面的路径上创建一个“di.xml”文件。

app\code\Vendor\Extension\etc\di.xml

现在，添加此代码

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
  <preference for="Magento\Framework\Pricing\Render\Amount" type="Vendor\Extension\Pricing\Render\Amount"/>
</config>

步骤2： 之后， 在以下扩展名文件夹路径内创建一个“金额.php”文件。

app\code\Vendor\Extension\Pricing\Render\Amount.php

并且，添加代码，如下所述

<?php
namespace Vendor\Extension\Pricing\Render;
 
use Magento\Framework\Pricing\Amount\AmountInterface;
use Magento\Framework\Pricing\SaleableInterface;
use Magento\Framework\Pricing\Price\PriceInterface;
use Magento\Framework\Pricing\PriceCurrencyInterface;
use Magento\Framework\View\Element\Template;
 
 
class Amount extends Template implements \Magento\Framework\Pricing\Render\AmountRenderInterface
{
   
    protected $saleableItem;
    protected $price;
    protected $adjustmentRenders;
    protected $priceCurrency;
    protected $rendererPool;
    protected $amount;
    protected $displayValue;
    protected $adjustmentsHtml = [];
   
    public function __construct(
        Template\Context $context,
        AmountInterface $amount,
        PriceCurrencyInterface $priceCurrency,
        \Magento\Framework\Pricing\Render\RendererPool $rendererPool,
        SaleableInterface $saleableItem = null,
        PriceInterface $price = null,
        array $data = [])
    {
        parent::__construct($context, $data);
        $this->amount = $amount;
        $this->saleableItem = $saleableItem;
        $this->price = $price;
        $this->priceCurrency = $priceCurrency;
        $this->rendererPool = $rendererPool;
    }
 
    public function setDisplayValue($value)
    {
        $this->displayValue = $value;
    }
    public function getDisplayValue()
    {
        if ($this->displayValue !== null)
        {
            return round($this->displayValue);
        }
        else
        {
            return round($this->getAmount()->getValue());
        }
       
    }
    public function getAmount()
    {
        return $this->amount;
    }
    public function getSaleableItem()
    {
        return $this->saleableItem;
    }
    public function getPrice()
    {
        return $this->price;
    }
    public function getDisplayCurrencyCode()
    {
        return $this->priceCurrency->getCurrency()->getCurrencyCode();
    }
    public function getDisplayCurrencySymbol()
    {
        return $this->priceCurrency->getCurrencySymbol();
    }
    public function hasAdjustmentsHtml()
    {
        return (bool) count($this->adjustmentsHtml);
    }
    public function getAdjustmentsHtml()
    {
        return implode('', $this->adjustmentsHtml);
    }
    protected function _toHtml()
    {
        $adjustmentRenders = $this->getAdjustmentRenders();
        if ($adjustmentRenders)
        {
            $adjustmentHtml = $this->getAdjustments($adjustmentRenders);
            if (!$this->hasSkipAdjustments() ||
                ($this->hasSkipAdjustments() && $this->getSkipAdjustments() == false))
            {
                $this->adjustmentsHtml = $adjustmentHtml;
            }
        }
        $html = parent::_toHtml();
        return $html;
    }
    protected function getAdjustmentRenders()
    {
        return $this->rendererPool->getAdjustmentRenders($this->saleableItem, $this->price);
    }
    protected function getAdjustments($adjustmentRenders)
    {
        $this->setAdjustmentCssClasses($adjustmentRenders);
        $data = $this->getData();
        $adjustments = [];
        foreach ($adjustmentRenders as $adjustmentRender)
        {
            if ($this->getAmount()->getAdjustmentAmount($adjustmentRender->getAdjustmentCode()) !== false)
            {
                $html = $adjustmentRender->render($this, $data);
                if (trim($html))
                {
                    $adjustments[$adjustmentRender->getAdjustmentCode()] = $html;
                }
            }
        }
        return $adjustments;
    }
    public function formatCurrency(
        $amount,
        $includeContainer = true,
        $precision = PriceCurrencyInterface::DEFAULT_PRECISION)
    {
        return $this->priceCurrency->format($amount, $includeContainer, $precision);
    }
    protected function setAdjustmentCssClasses($adjustmentRenders)
    {
        $cssClasses = $this->hasData('css_classes') ? explode(' ', $this->getData('css_classes')) : [];
        $cssClasses = array_merge($cssClasses, array_keys($adjustmentRenders));
        $this->setData('adjustment_css_classes', join(' ', $cssClasses));
        return $this;
    }
}

结论：

通过这种方式，您可以四舍五入Magento 2中的所有价格。