Java 删除 ns2 作为默认命名空间前缀
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Remove ns2 as default namespace prefix
提问by Vegard
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:
我有一个使用默认命名空间打印的文件。元素以 ns2 的前缀打印，我需要删除它，我的代码如何：
<ns2:foo xmlns:ns2="http://namespace" />
how I want it to be:
我希望它如何：
<foo xmlns="http://namespace" />
this is how I have coded it, something which as I see it should be enough for the ns2 to go away:
这就是我编码它的方式，在我看来，它应该足以让 ns2 消失：
<?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">
...
the generated package-info turns out like this:
生成的包信息结果是这样的：
@javax.xml.bind.annotation.XmlSchema(namespace = "http://namespace",
elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
package com.foo.bar;
I create the file like this:
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 is the package where package-info.java and the elements are.
generateClassesPackage 是 package-info.java 和元素所在的包。
The Foo object is defined and has elements like this::
定义了 Foo 对象并具有如下元素：
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
"group"
})
@XmlRootElement(name = "Foo")
public class Foo {
@XmlElement(name = "Group", required = true)
protected List<Group> group;
Is it something I have missed? or have I misunderstood how this works?
是我错过了什么吗？还是我误解了这是如何工作的？
采纳答案by Daniel Moses
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:
很可能您在响应中有多个命名空间。这将使用创建 ns# 命名空间前缀的默认约定，其中之一成为没有前缀的 xmlns。如果您想控制它，您可以执行以下操作：
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....
This will set the http://namespaceas the default xmlns always and use ns# for all other namespaces when marshalling. You can also give them more descriptive prefixes if you want.
这将http://namespace始终将xmlns设置为默认值，并在编组时将 ns# 用于所有其他命名空间。如果需要，您还可以为它们提供更多描述性前缀。
回答by s332401890
Beginning from JDK6u18 the NamespacePrefixMapper technique is not used anymore.
从 JDK6u18 开始，不再使用 NamespacePrefixMapper 技术。
回答by yonia
All you need 2 do is when you open a new package select create package info in the package info add the following annotation or change it as needed
您需要做的就是当您打开一个新包时，在包信息中选择创建包信息添加以下注释或根据需要进行更改
@javax.xml.bind.annotation.XmlSchema(namespace = "http://www.sitemaps.org/schemas/sitemap/0.9", elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED, xmlns = { @javax.xml.bind.annotation.XmlNs(namespaceURI = "http://www.sitemaps.org/schemas/sitemap/0.9", prefix = "") })
This will remove the ns2 prefix
这将删除 ns2 前缀
回答by Diego Maye
I solve this deleting the file package-info.java into the jaxb classes package and re-compiling the application.
我解决了这个问题，将文件 package-info.java 删除到 jaxb classes 包中并重新编译应用程序。
回答by Vladimir
For Java 8:
对于 Java 8：
I chagnge prefix name from 'ns2' to 'fault'.
我将前缀名称从“ ns2”更改为“ fault”。
Firstly, create your *DefaultNamespacePrefixMapper *.
首先，创建您的 *DefaultNamespacePrefixMapper *。
import com.sun.xml.bind.marshaller.NamespacePrefixMapper;
import java.util.HashMap;
import java.util.Map;
public class DefaultNamespacePrefixMapper extends NamespacePrefixMapper {
private static final String FAULT_PREFIX = "fault";
private Map<String, String> namespaceMap = new HashMap<>();
public DefaultNamespacePrefixMapper() {
this.namespaceMap.put(NAMESPACE, FAULT_PREFIX);
}
@Override
public String getPreferredPrefix(String namespaceUri, String suggestion, boolean requirePrefix) {
return namespaceMap.getOrDefault(namespaceUri, suggestion);
}
}
Secondy, add your DefaultNamespacePrefixMapperto Marshaller property.
其次，将您的DefaultNamespacePrefixMapper添加到 Marshaller 属性。
@SuppressWarnings("unchecked")
private <T> void returnFault(T fault, SoapFault soapFault) {
try {
JAXBContext jaxbContext = JAXBContext.newInstance(fault.getClass());
QName name = new QName(NAMESPACE, fault.getClass().getSimpleName());
JAXBElement<T> element = new JAXBElement<>(name, (Class<T>) fault.getClass(), fault);
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty("com.sun.xml.bind.namespacePrefixMapper", new DefaultNamespacePrefixMapper());
marshaller.marshal(element, soapFault.addFaultDetail().getResult());
} catch (JAXBException e) {
log.error("Exception when marshalling SOAP fault.", e);
}
}
Thirdly, add following dependencies in gradle/maven.
第三，在 gradle/maven 中添加以下依赖项。
compile 'com.sun.xml.bind:jaxb-impl:2.2.11'
compile 'com.sun.xml.bind:jaxb-core:2.2.11'
回答by Boss
Change the attribute value of elementFormDefault="unqualified" in
更改 elementFormDefault="unqualified" 中的属性值
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:bar="http://namespace" targetNamespace="http://namespace" elementFormDefault="qualified">
