问题描述
为什么我会收到此错误:
Why am I getting this error:
错误:'前缀'xsi'的命名空间尚未声明.'
这是我的 Java 代码:
Here is my Java code:
package com.emp.ma.jbl.nsnhlrspmlpl.nsnhlrspmlpl.internal.action;
import com.emp.ma.util.xml.XMLDocument;
import com.emp.ma.util.xml.XMLDocumentBuilder;
public class yay {
public static void main(String[] args) {
XMLDocument xmldoc = XMLDocumentBuilder.newDocument().addRoot("spml:modifyRequest");
xmldoc.gotoRoot().addTag("modification").addText("");
xmldoc.gotoChild("modification").addTag("valueObject").addText("");
xmldoc.gotoChild("valueObject").addAttribute("xsi:type","halo");
System.out.println(xmldoc);
}
}
这段代码运行正常,直到我尝试抛出转换器异常,同时将 XML 文件转换为 HTML 仅用于实验.我需要使用以下格式创建一个 xml 文件:
This code was functioning properly until I tried throwing transformer exception whilst converting XML file to HTML for experimenting only.I need to create an xml file with the format:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<spml:modifyRequest>
<modification>
<valueObject xsi:type="halo">
</valueObject>
</modification>
</spml:modifyRequest>
我已经从代码中删除了转换器部分,但我在 eclipse 中遇到了这个错误:
I removed the transformer part from the code already and yet I'm getting this error in eclipse:
ERROR: 'Namespace for prefix 'xsi' has not been declared.'
Exception in thread "main" com.emp.ma.util.xml.XMLDocumentException: java.lang.RuntimeException: Namespace for prefix 'xsi' has not been declared.
at com.emp.ma.util.xml.XMLDocumentImpl.toResult(XMLDocumentImpl.java:1244)
at com.emp.ma.util.xml.XMLDocumentImpl.toStream(XMLDocumentImpl.java:1314)
at com.emp.ma.util.xml.XMLDocumentImpl.toString(XMLDocumentImpl.java:1336)
at com.emp.ma.util.xml.XMLDocumentImpl.toString(XMLDocumentImpl.java:1325)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.emp.ma.util.xml.XMLDocumentBuilder$XMLDocumentHandler.invoke(XMLDocumentBuilder.java:55)
at $Proxy1.toString(Unknown Source)
at java.lang.String.valueOf(Unknown Source)
at java.io.PrintStream.println(Unknown Source)
at com.emp.ma.jbl.nsnhlrspmlpl.nsnhlrspmlpl.internal.action.yay.main(yay.java:13)
Caused by: javax.xml.transform.TransformerException: java.lang.RuntimeException: Namespace for prefix 'xsi' has not been declared.
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(Unknown Source)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(Unknown Source)
at com.emp.ma.util.xml.XMLDocumentImpl.toResult(XMLDocumentImpl.java:1242)
... 12 more
Caused by: java.lang.RuntimeException: Namespace for prefix 'xsi' has not been declared.
at com.sun.org.apache.xml.internal.serializer.SerializerBase.getNamespaceURI(Unknown Source)
at com.sun.org.apache.xml.internal.serializer.SerializerBase.addAttribute(Unknown Source)
at com.sun.org.apache.xalan.internal.xsltc.trax.DOM2TO.parse(Unknown Source)
at com.sun.org.apache.xalan.internal.xsltc.trax.DOM2TO.parse(Unknown Source)
at com.sun.org.apache.xalan.internal.xsltc.trax.DOM2TO.parse(Unknown Source)
at com.sun.org.apache.xalan.internal.xsltc.trax.DOM2TO.parse(Unknown Source)
at com.sun.org.apache.xalan.internal.xsltc.trax.DOM2TO.parse(Unknown Source)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(Unknown Source)
... 15 more
我因为这个异常被卡住了,我不知道如何撤消.请帮忙.就像我说的,在尝试我的这个实验之前,它运行正常,如果可能的话,我如何删除这个变压器集成.我也尝试过更改工作区 - 仍然无法正常工作.
I'm stuck because of this one exception and I don't know how to undo this. Please do help. Like i said, it was functioning properly before trying this experiment of mine, if possible how do I remove this transformer integration. I've tried changing workspace as well -- still not working.
推荐答案
要使 XML 文档格式正确,必须声明所有使用的名称空间前缀.
For an XML document to be well-formed, all used namespace prefixes must be declared.
只需在 XML 的根元素上声明 xsi
命名空间前缀,
Simply declare the xsi
namespace prefix on the root element of your XML,
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<spml:modifyRequest xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modification>
<valueObject xsi:type="halo">
</valueObject>
</modification>
</spml:modifyRequest>
你的错误就会消失.
请注意,您同样必须定义 spml
命名空间前缀.
Note that you'll similarly have to define the spml
namespace prefix.
这篇关于错误:“尚未声明前缀“xsi"的命名空间.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!