使用JAXB将XML XML组件转换为Java对象



我已经将Java对象编制为XML元素。现在,我面临着使用JAXB将XML文件汇总到Java对象的困难。它与将Java对象编造为XML相似吗?以下是我从外部API获得的XML文件。

<ShoppingMall>
  <ProductList>
    <product_info>
      <group_nm>electronic device</group_nm>
      <group_code>e001</group_code>
      <product_nm>computer</product_nm>
      <price>30000</price>
    </product_info>
    <product_info>
      <group_nm>living</group_nm>
      <group_code>lv002</group_code>
      <product_nm>bed</product_nm>
      <price>140000</price>
    </product_info>
    <product_info>
      <group_nm>Food</group_nm>
      <group_code>f001</group_code>
      <product_nm>pasta</product_nm>
      <price>10</price>
    </product_info>    
  </ProductList>
</ShoppingMall>

要将XML元素交换给Java对象,我该如何处理Jaxb?

首先为

创建三个Java类
  • shoppmall(产品列表是此类的XML元素)
  • productList(product_info是此类的XML元素)
  • product_info(group_nm,group_code,product_nm和价格是此类XML元素)

然后尝试一下,

JAXBContext jaxbContext = JAXBContext.newInstance(ShoppingMall.class);
Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
ShoppingMall shoppingMall = (ShoppingMall) jaxbUnmarshaller.unmarshal( new File("your_xml_file.xml") );

我想您想将其放到Shoppingmall类中。因此,您可能会写类似的东西。

ShoppingMall shoppingMall = getShoppignMallByUnmarshal(your_xml);
  
  public static getShoppignMallByUnmarshal(
      String xml) throws JAXBException
  {
    JAXBContext jaxbContext = JAXBContext.newInstance(package.path.of.ShoppingClass.ObjectFactory.class);
    Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
    return ((JAXBElement<ShoppingMall>) jaxbUnmarshaller.unmarshal(new StringReader(xml)))
        .getValue();
  }

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