org.xmlpull.v1.XmlPullParserException [英] org.xmlpull.v1.XmlPullParserException

问题描述

我正在尝试将xml文件（作为 byte [] ）绑定到java对象。这是我的代码 -

I'm trying to bind an xml file(as a byte[]) to a java object. This is my code-

public voidinputConfigXML(String xmlfile, byte[] xmlData) {
    IBindingFactory bFact = BindingDirectory.getFactory(GroupsDTO.class);
                IUnmarshallingContext uctx = bFact.createUnmarshallingContext();
                groups = (GroupsDTO) uctx.unmarshalDocument(new ByteArrayInputStream(xmlData), "UTF8");
}

unmarshalDocument（）正在给我这个例外。我该怎么办？

The unmarshalDocument() is giving me this exception. What do i do?

FYI：作为JUnit测试用例运行

以下是堆栈跟踪 -

The following is the stacktrace -

    Error parsing document (line 1, col 1)
    org.xmlpull.v1.XmlPullParserException: only whitespace content allowed before start tag and not \u0 (position: START_DOCUMENT seen \u0... @1:1) 
        at org.xmlpull.mxp1.MXParser.parseProlog(MXParser.java:1519)
        at org.xmlpull.mxp1.MXParser.nextImpl(MXParser.java:1395)
        at org.xmlpull.mxp1.MXParser.next(MXParser.java:1093)
        at org.jibx.runtime.impl.XMLPullReaderFactory$XMLPullReader.next(XMLPullReaderFactory.java:291)
        at org.jibx.runtime.impl.UnmarshallingContext.toStart(UnmarshallingContext.java:451)
        at org.jibx.runtime.impl.UnmarshallingContext.unmarshalElement(UnmarshallingContext.java:2755)
        at org.jibx.runtime.impl.UnmarshallingContext.unmarshalDocument(UnmarshallingContext.java:2905)
        at abc.dra.DRAAPI.inputConfigXML(DRAAPI.java:31)
        at abc.dra.XMLToObject_Test.test(XMLToObject_Test.java:34)
        [...]

这是我的代码，形成byte [] -

This is my code that forms byte[]-

void test() {
String xmlfile = "output.xml"
File file = new File(xmlfile);
byte[] xmlData = new byte[(int) file.length()];
groups = dra.inputConfigXML(xmlfile, xmlData);
}

推荐答案

ByteArrayInputstream为空：

The ByteArrayInputstream is empty:

only whitespace content allowed before start tag and not \u0 
(position: START_DOCUMENT seen \u0... @1:1) 

表示找到了一个\ u0位作为XML中的第一个字符。

means, that a \u0 Bit was found as first char within the XML.

确保您的 byte [] 内容并且UTF-8不以< a href =http://en.wikipedia.org/wiki/Byte_Order_Mark =nofollow noreferrer> BOM 。

Ensure you have content within your byte[] and the UTF-8 don't start with a BOM.

我不认为BOM是你的问题，但我经常遇到有关BOM和java的问题。

I don't think, that the BOM is your problem here, but I often encountert regarding BOM and java.

更新

您没有填写 byte [] 。你必须将文件内容读入 byte [] ：
读取： Java中的文件到byte []

You don't fill the byte[]. You have to read the file-content into the byte[]: read this: File to byte[] in Java

顺便说一下： byte [ ] xmlData = new byte [（int）file.length（）]; 是错误的代码风格，因为你会遇到更大的XML文件的问题。如果它们大于 Integer.MAX_VALUE ，您将读取损坏的文件。

By the way: byte[] xmlData = new byte[(int) file.length()]; is bad code-style, becaus you will run into problems with larger XML-files. If they are larger than Integer.MAX_VALUE you will read a corrupt file.

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