解析 XSD 并获取嵌套元素 [英] Parsing XSD and getting nested elements

问题描述

经过这个页面后，我写了以下代码解析 XSD 文件.但是我只得到根元素，我迷失了如何在其中获取嵌套元素.代码:

After going through this page, I wrote the following code to parse an XSD file. However I only get the root element, and I am lost so as to how to get the nested elements inside it. Code:

            XMLSchemaLoader loader = new XMLSchemaLoader();
            XSModel model = loader.loadURI(url.toURI().toString());
            XSNamedMap map = model.getComponents(XSConstants.ELEMENT_DECLARATION);  //returns the root component 

            if(map!=null ){
                for (int j=0; j<map.getLength(); j++) {
                   String name = map.item(j).getName(); //returns 'country' correctly.                    
                }
            }

我没有发布整个 xsd，但这是结构:

I am not posting the entire xsd, but this is the structure:

<xsd:element name="country">
    <xsd:complexType>
        <xsd:annotation>
                <xsd:appinfo id="substring">No</xsd:appinfo>                                                
        </xsd:annotation>
        <xsd:sequence minOccurs="1" maxOccurs="unbounded">
            <xsd:element name="states"  minOccurs="1" maxOccurs="1" >
                <xsd:complexType>
                    <xsd:annotation>
                            <xsd:appinfo id="substring">No</xsd:appinfo>                                                
                    </xsd:annotation>
                    <xsd:sequence>
                        <xsd:element name="cities" minOccurs="1" maxOccurs="unbounded">
                        </xsd:element>
                    </xsd:sequence>
                    <xsd:attribute name="name" type="xsd:string" />
                </xsd:complexType>
            </xsd:element>
        </xsd:sequence>
        <xsd:attribute name="name" type="xsd:string"></xsd:attribute>
    </xsd:complexType>
</xsd:element>

我希望阅读所有元素，而不仅仅是基本元素，但不确定如何继续.感谢您的帮助.

I am looking to read all the elements, not just the base element, and not sure how to proceed. Thanks for the help.

推荐答案

我认为您试图迭代 XSNamedMap 错误.您只获得 country 元素的原因是因为它是根元素.您可能必须深入到 XSNamespaceItem 并调用 getComponents 检索另一组 XSNamedMap 对象.

I think your trying to iterate over the XSNamedMap incorrectly. The reason you are getting only the country element is because it is the root element. You will probably have to descend down into XSNamespaceItem and call getComponents to retrieve another set of XSNamedMap objects.

这将正确解析 XSD，但您仍然需要遍历树.

This will properly parse the XSD but you still have to traverse the tree.

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