删除ns2作为默认名称空间前缀 [英] Remove ns2 as default namespace prefix

问题描述

我有一个使用默认命名空间打印的文件。元素打印的前缀为ns2，我需要将其删除，以及我的代码如何：

I have a file that is printed with a default namespace. The elements are printed with a prefix of ns2, I need this to be removed, how it is with my code:

<ns2:foo xmlns:ns2="http://namespace" />

我希望如何：

<foo xmlns="http://namespace" />

这就是我编码的方式，正如我所看到的那样，ns2应该足够了离开：

this is how I have coded it, something which as I see it should be enough for the ns2 to go away:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
    xmlns:bar="http://namespace" targetNamespace="http://namespace"
    elementFormDefault="qualified">
...

生成的包信息如下：

@javax.xml.bind.annotation.XmlSchema(namespace = "http://namespace", 
    elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
package com.foo.bar;

我创建这样的文件：

JAXBContext jaxbContext = JAXBContext.newInstance(generatedClassesPackage);
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
marshaller.marshal(new JAXBElement<Foo>(new QName("http://namespace", "Foo"),
Foo.class, rootFoo), outputStream);

generatedClassesPackage是package-info.java和元素所在的包。

generatedClassesPackage is the package where package-info.java and the elements are.

定义了Foo对象，其元素如下：

The Foo object is defined and has elements like this::

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
    "group"
})
@XmlRootElement(name = "Foo")
public class Foo {

    @XmlElement(name = "Group", required = true)
    protected List<Group> group;

我错过了什么？或者我误解了它是如何工作的？

Is it something I have missed? or have I misunderstood how this works?

推荐答案

很可能你在响应中有多个命名空间。这将使用创建ns＃namespace前缀的默认约定，其中一个成为没有前缀的xmlns。如果你想控制它，你可以执行以下操作：

Most likely you have multiple namespaces in the response. This will use the default convention of creating ns# namespace prefixes and one of them becomes the xmlns without a prefix. If you want to control this you can do the following:

NamespacePrefixMapper mapper = new NamespacePrefixMapper() {
        public String getPreferredPrefix(String namespaceUri, String suggestion, boolean requirePrefix) {
            if ("http://namespace".equals(namespaceUri) && !requirePrefix)
                return "";
            return "ns";
        }
    };
    marshaller.setProperty("com.sun.xml.bind.namespacePrefixMapper", mapper);
    marshaller.mashal....

这将设置 http：// namespace 作为默认的xmlns，并在编组时使用ns＃作为所有其他名称空间。如果需要，您还可以为它们提供更多描述性前缀。

This will set the http://namespace as the default xmlns always and use ns# for all other namespaces when marshalling. You can also give them more descriptive prefixes if you want.

这篇关于删除ns2作为默认名称空间前缀的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！