JDOM 中的命名空间(默认)

发布于 2024-12-19 06:15:29 字数 1122 浏览 2 评论 0原文

我正在尝试使用最新的 JDOM 包生成 XML 文档。我在根元素和命名空间方面遇到问题。我需要生成此根元素:

<ManageBuildingsRequest 
    xmlns="http://www.energystar.gov/manageBldgs/req" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://www.energystar.gov/manageBldgs/req 
                        http://estar8.energystar.gov/ESES/ABS20/Schemas/ManageBuildingsRequest.xsd">

我使用此代码:

Element root = new Element("ManageBuildingsRequest");
root.setNamespace(Namespace.getNamespace("http://www.energystar.gov/manageBldgs/req"));
Namespace XSI = Namespace.getNamespace("xsi", "http://www.w3.org/2001/XMLSchema-instance");
root.addNamespaceDeclaration(XSI);
root.setAttribute("schemaLocation", "http://www.energystar.gov/manageBldgs/req http://estar8.energystar.gov/ESES/ABS20/Schemas/ManageBuildingsRequest.xsd", XSI);

Element customer = new Element("customer");
root.addContent(customer);
doc.addContent(root); // doc jdom Document

但是,ManageBuildingsRequest 之后的下一个元素也具有默认名称空间,这会破坏验证:

<customer xmlns="">

有帮助吗?感谢您抽出时间。

I am trying to produce a XML document using the newest JDOM package. I'm having trouble with the root element and the namespaces. I need to produce this root element:

<ManageBuildingsRequest 
    xmlns="http://www.energystar.gov/manageBldgs/req" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://www.energystar.gov/manageBldgs/req 
                        http://estar8.energystar.gov/ESES/ABS20/Schemas/ManageBuildingsRequest.xsd">

I use this code:

Element root = new Element("ManageBuildingsRequest");
root.setNamespace(Namespace.getNamespace("http://www.energystar.gov/manageBldgs/req"));
Namespace XSI = Namespace.getNamespace("xsi", "http://www.w3.org/2001/XMLSchema-instance");
root.addNamespaceDeclaration(XSI);
root.setAttribute("schemaLocation", "http://www.energystar.gov/manageBldgs/req http://estar8.energystar.gov/ESES/ABS20/Schemas/ManageBuildingsRequest.xsd", XSI);

Element customer = new Element("customer");
root.addContent(customer);
doc.addContent(root); // doc jdom Document

However, the next element after ManageBuildingsRequest has the default namespace as well, which breaks the validation:

<customer xmlns="">

Any help? Thank you for your time.

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评论(3

标点 2024-12-26 06:15:29

您的构造函数用于 customer 元素会创建没有命名空间的元素。您应该使用以 Namespace 作为参数的构造函数。您还可以为根元素和客户元素重复使用相同的Namespace 对象。

Namespace namespace = Namespace.getNamespace("http://www.energystar.gov/manageBldgs/req");
Element root = new Element("ManageBuildingsRequest", namespace);
Namespace XSI = Namespace.getNamespace("xsi", "http://www.w3.org/2001/XMLSchema-instance");
root.addNamespaceDeclaration(XSI);
root.setAttribute("schemaLocation", "http://www.energystar.gov/manageBldgs/req http://estar8.energystar.gov/ESES/ABS20/Schemas/ManageBuildingsRequest.xsd", XSI);

Element customer = new Element("customer", namespace);
root.addContent(customer);
doc.addContent(root); // doc jdom Document

The constructor you're using for the customer element creates it with no namespace. You should use the constructor with the Namespace as parameter. You can also reuse the same Namespace object for both root and customer elements.

Namespace namespace = Namespace.getNamespace("http://www.energystar.gov/manageBldgs/req");
Element root = new Element("ManageBuildingsRequest", namespace);
Namespace XSI = Namespace.getNamespace("xsi", "http://www.w3.org/2001/XMLSchema-instance");
root.addNamespaceDeclaration(XSI);
root.setAttribute("schemaLocation", "http://www.energystar.gov/manageBldgs/req http://estar8.energystar.gov/ESES/ABS20/Schemas/ManageBuildingsRequest.xsd", XSI);

Element customer = new Element("customer", namespace);
root.addContent(customer);
doc.addContent(root); // doc jdom Document
茶底世界 2024-12-26 06:15:29

这是实现自定义 XMLOutputProcessor 的替代方法,该方法会跳过发出空名称空间声明:

public class CustomXMLOutputProcessor extends AbstractXMLOutputProcessor {
    protected void printNamespace(Writer out, FormatStack fstack, Namespace ns)
            throws java.io.IOException {
        System.out.println("namespace is " + ns);
        if (ns == Namespace.NO_NAMESPACE) {
            System.out.println("refusing to print empty namespace");
            return;
        } else {
            super.printNamespace(out, fstack, ns);
        }
    }
}

Here's an alternate approach that implements a custom XMLOutputProcessor that skips emitting empty namespace declarations:

public class CustomXMLOutputProcessor extends AbstractXMLOutputProcessor {
    protected void printNamespace(Writer out, FormatStack fstack, Namespace ns)
            throws java.io.IOException {
        System.out.println("namespace is " + ns);
        if (ns == Namespace.NO_NAMESPACE) {
            System.out.println("refusing to print empty namespace");
            return;
        } else {
            super.printNamespace(out, fstack, ns);
        }
    }
}
昔梦 2024-12-26 06:15:29

我尝试了 javaanna 的代码,但不幸的是它继续在文档内容中生成空名称空间。在尝试了 bearontheroof 的代码后,XML 导出得很好。

创建自定义类后,您必须执行以下操作:

CustomXMLOutputProcessor output = new CustomXMLOutputProcessor();
output.process(new FileWriter("/path/to/folder/generatedXML.xml"), Format.getPrettyFormat(), document);

I tried javanna's code but unfortunately it kept on generating the empty namespaces in the document's contents. After trying bearontheroof's code the XML exported just fine.

You would have to do something like this after creating the custom class:

CustomXMLOutputProcessor output = new CustomXMLOutputProcessor();
output.process(new FileWriter("/path/to/folder/generatedXML.xml"), Format.getPrettyFormat(), document);
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