Question

我正在使用StAX和JAXB解析大型xml文件，但出现此错误：

com.ctc.wstx.exc.WstxParsingException: Received non-all-whitespace CHARACTERS or CDATA event in nextTag().

此代码为：

public class UnmarshalDemo {
    public static void main(String[] args) throws Exception {

        XMLInputFactory xif = XMLInputFactory.newFactory();
        StreamSource xml = new StreamSource(xmlpath);
        XMLStreamReader xsr = xif.createXMLStreamReader(xml);
        xsr.nextTag();

        while(!xsr.getLocalName().equals("Name")) { //until tag is name
            xsr.nextTag(); //get next tag
        }

        JAXBContext jc = JAXBContext.newInstance(Name.class);
        Unmarshaller unmarshaller = jc.createUnmarshaller();
        JAXBElement<Name> jb = unmarshaller.unmarshal(xsr, Name.class);
        xsr.close();

        Name name = jb.getValue();

        System.out.println("First Name: "+ name.getFirstName());
        System.out.println("Middle Initial: " + name.getMiddleInitial());
        System.out.println("Last Name: " + name.getLastName());
    }
}

对象类是：

import javax.xml.bind.annotation.*;

@XmlAccessorType(XmlAccessType.FIELD)
public class Name {

    String FirstName;
    String MiddleInitial;
    String LastName;

    public Name() {}

    public Name(String firstName, String middleInitial, String lastName) {
        super();
        FirstName = firstName;
        MiddleInitial = middleInitial;
        LastName = lastName;
    }

    public String getFirstName() {
        return FirstName;
    }

    public void setFirstName(String firstName) {
        FirstName = firstName;
    }

    public String getMiddleInitial() {
        return MiddleInitial;
    }

    public void setMiddleInitial(String middleInitial) {
        MiddleInitial = middleInitial;
    }

    public String getLastName() {
        return LastName;
    }

    public void setLastName(String lastName) {
        LastName = lastName;
    }

    @Override
    public String toString() {
        return "Name [FirstName=" + FirstName + ", MiddleInitial=" + MiddleInitial + ", LastName=" + LastName + "]";
    }

}

xml的开头是：

<?xml version="1.0" encoding="utf-16"?>
    <xfa:datasets xmlns:xfa="http://www.xfa.org/schema/xfa-data/1.0/">
        <xfa:data>
            <FormData>
                <Application>
                    <AppType>
                        <Income>1</Income>
                            <Option>0</Option>

收入元素是失败行。

我收到的错误是：

Exception in thread "main" com.ctc.wstx.exc.WstxParsingException: Received non-all-whitespace CHARACTERS or CDATA event in nextTag().at [row,col,system-id]: [7,38, "xmlfilepath"]
at com.ctc.wstx.sr.StreamScanner.constructWfcException(StreamScanner.java:621)
    at com.ctc.wstx.sr.StreamScanner.throwParseError(StreamScanner.java:491)
    at com.ctc.wstx.sr.StreamScanner.throwParseError(StreamScanner.java:475)
    at com.ctc.wstx.sr.BasicStreamReader.nextTag(BasicStreamReader.java:1224)
    at com.nm.ni.workflow.service.UnmarshalDemo.main(UnmarshalDemo.java:35)

我对错误的来源感到困惑，因为代码能够解析简单的示例xml，例如：

<?xml version="1.0" encoding="UTF-8"?>
<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">
    <S:Body>
        <ns0:findCustomerResponse xmlns:ns0="http://service.jaxws.blog/">
            <InsuredData>
                <Name>
                    <FirstName>Jane</FirstName>
                    <MiddleInitial>M</MiddleInitial>
                    <LastName>Doe</LastName>
                </Name>
            </InsuredData>
</ns0:findCustomerResponse>
    </S:Body>
</S:Envelope>

控制台打印出：

First Name: Jane
Middle Initial: M
Last Name: Doe

，但是当它到达更复杂的xml时会导致异常。

我的问题是为什么我会收到此异常以及如何解决它？

Answer 1

阅读XMLStreamReader#nextTag()的文档：

跳过任何空格（isWhiteSpace（）返回true），COMMENT或 PROCESSING_INSTRUCTION，直到START_ELEMENT或END_ELEMENT为到达。 如果不是空格字符，COMMENT，遇到了PROCESSING_INSTRUCTION，START_ELEMENT，END_ELEMENT，会引发异常。处理时应使用此方法纯元素内容，用空格分隔。

我认为您应该做什么很明显：在循环测试中结合使用next()和isStartElement()。

解析XML JAXB-引发解析错误

1 个答案: