jaxbcontext生成不完整的模式？

Question

我遇到了JAXB的一个奇怪问题.我用xjc从我的XSD生成我的java类,看起来很好看.如果我使用schemagen,它会生成一个与原始xsd匹配的正确模式.但是,如果我使用JAXBContext.generateSchema(),则生成的架构不完整.

我正在使用Oracle Java 1.6.0_29和jaxb-2.2.4-1.jar作为实现.我正在附上java代码(生成模式),以及下面的xsd以及jaxb调用的输出.

CalculateBorrowingDataResponse.xsd:

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema 
    version="1.1"
    attributeFormDefault="unqualified" 
    elementFormDefault="qualified"
    targetNamespace="http://www.domain.com/ClientServices/LendingSimulation/CalculateBorrowingDataResponse" 
    xmlns:lssSt="http://www.domain.com/ClientServices/LendingSimulation/CalculateBorrowingDataResponse"
    xmlns:cbdRes="http://www.domain.com/ClientServices/LendingSimulation/CalculateBorrowingDataResponse" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">


    <!-- CalculateBorrowingData -->
    <xsd:complexType name="CalculateBorrowingDataResponseType">
        <xsd:sequence>
            <xsd:element name="loanAgmt" type="cbdRes:LoanAgreementType" minOccurs="1" maxOccurs="1" />
        </xsd:sequence>
    </xsd:complexType>


    <xsd:complexType name="LoanAgreementType">
        <xsd:sequence>
            <xsd:element name="borrowingBasedPmtAmt" type="lssSt:borrowingBasedPmtAmt" minOccurs="0" maxOccurs="1" />
            <xsd:element name="maxPmtAmt" type="lssSt:maxPmtAmt" minOccurs="0" maxOccurs="1" />
            <xsd:element name="borrowingCapacityMin" type="lssSt:borrowingCapacityMin" minOccurs="0" maxOccurs="1" />
            <xsd:element name="borrowingCapacityMax" type="lssSt:borrowingCapacityMax" minOccurs="0" maxOccurs="1" />
            <xsd:element name="propertyValueMinAmt" type="lssSt:propertyValueMinAmt" minOccurs="0" maxOccurs="1" />
            <xsd:element name="propertyValueMaxAmt" type="lssSt:propertyValueMaxAmt" minOccurs="0" maxOccurs="1" />
        </xsd:sequence>
    </xsd:complexType>

    <xsd:element name="calculateBorrowingDataResponse" type="cbdRes:CalculateBorrowingDataResponseType"/>


    <xsd:simpleType name="borrowingBasedPmtAmt">
        <xsd:restriction base="xsd:decimal" >
        <xsd:totalDigits value="19" />
        <xsd:fractionDigits value="4" />
        </xsd:restriction>
    </xsd:simpleType>
    <xsd:simpleType name="maxPmtAmt">
        <xsd:restriction base="xsd:decimal" >
        <xsd:totalDigits value="19" />
        <xsd:fractionDigits value="4" />
        </xsd:restriction>
    </xsd:simpleType>
    <xsd:simpleType name="borrowingCapacityMin">
        <xsd:restriction base="xsd:decimal" >
        <xsd:totalDigits value="19" />
        <xsd:fractionDigits value="4" />
        </xsd:restriction>
    </xsd:simpleType>
    <xsd:simpleType name="borrowingCapacityMax">
        <xsd:restriction base="xsd:decimal" >
        <xsd:totalDigits value="19" />
        <xsd:fractionDigits value="4" />
        </xsd:restriction>
    </xsd:simpleType>
    <xsd:simpleType name="propertyValueMinAmt">
        <xsd:restriction base="xsd:decimal" >
        <xsd:totalDigits value="19" />
        <xsd:fractionDigits value="4" />
        </xsd:restriction>
    </xsd:simpleType>
    <xsd:simpleType name="propertyValueMaxAmt">
        <xsd:restriction base="xsd:decimal" >
        <xsd:totalDigits value="19" />
        <xsd:fractionDigits value="4" />
        </xsd:restriction>
    </xsd:simpleType>

</xsd:schema>

Java代码:

    // Creating the XML tree
    JAXBContext jc = JAXBContext.newInstance( CalculateBorrowingDataResponseType.class );
    Unmarshaller u = jc.createUnmarshaller();

    // generate the schemas
    final List<ByteArrayOutputStream> schemaStreams = new ArrayList<ByteArrayOutputStream>();
    jc.generateSchema(new SchemaOutputResolver(){
        @Override
        public Result createOutput(String namespaceUri, String suggestedFileName) throws IOException {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            schemaStreams.add(out);
            StreamResult streamResult = new StreamResult(out);
            streamResult.setSystemId("");
            return streamResult;
        }});

    // convert to a list of string
    List<String> schemas = new ArrayList<String>();
    for( ByteArrayOutputStream os : schemaStreams )
    {
        schemas.add(os.toString());
        System.out.println( os.toString());
    }

输出jaxbContext.generateSchema():

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xs:schema elementFormDefault="qualified" version="1.0" targetNamespace="http://www.domain.com/ClientServices/LendingSimulation/CalculateBorrowingDataResponse" xmlns:tns="http://www.domain.com/ClientServices/LendingSimulation/CalculateBorrowingDataResponse" xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <xs:complexType name="CalculateBorrowingDataResponseType">
    <xs:sequence>
      <xs:element name="loanAgmt" type="tns:LoanAgreementType"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="LoanAgreementType">
    <xs:sequence>
      <xs:element name="borrowingBasedPmtAmt" type="xs:decimal" minOccurs="0"/>
      <xs:element name="maxPmtAmt" type="xs:decimal" minOccurs="0"/>
      <xs:element name="borrowingCapacityMin" type="xs:decimal" minOccurs="0"/>
      <xs:element name="borrowingCapacityMax" type="xs:decimal" minOccurs="0"/>
      <xs:element name="propertyValueMinAmt" type="xs:decimal" minOccurs="0"/>
      <xs:element name="propertyValueMaxAmt" type="xs:decimal" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>
</xs:schema>

如您所见,输出模式非常接近,保存,除了它缺少calculateBorrowingDataResponse的元素定义!但是,如果我使用schemagen,则会生成calculateBorrowingDataResponse元素.

我在SchemaOutputResolver设置中遗漏了什么或者做了不正确/不完整的事情吗？或者这是Jaxb RI中的错误？

Answer 1

更改

JAXBContext.newInstance(CalculateBorrowingDataResponseType.class);

至

JAXBContext.newInstance(CalculateBorrowingDataResponseType.class.getPackage().getName());

JAXB需要在上面的类包中的package-info.java文件中定义的信息(由xjc您的XSD 生成).

它不会创建有问题的XSD元素,因为CalculateBorrowingDataResponseType它没有@XmlRootElement注释.

为什么不xjc从一开始创建一个？请参阅有关此问题的互联网上最权威的解释.

如果您提供包名称,为什么您的代码会生成上述元素,JAXBContext.newInstance(...)即使CalculateBorrowingDataResponseType仍然缺少@XmlRootAnnotation？我没有最微弱的想法! 我现在有!

Answer 2

生成的ObjectFactory类中的以下内容是导致生成该元素的原因:

@XmlElementDecl(namespace = "http://www.domain.com/ClientServices/LendingSimulation/CalculateBorrowingDataResponse", name = "calculateBorrowingDataResponse")
public JAXBElement<CalculateBorrowingDataResponseType> createCalculateBorrowingDataResponse(CalculateBorrowingDataResponseType value) {
    return new JAXBElement<CalculateBorrowingDataResponseType>(_CalculateBorrowingDataResponse_QNAME, CalculateBorrowingDataResponseType.class, null, value);
}

为了让ObjectFactoryJAXBContext处理类,您需要包含在传递的类数组中以创建JAXBContext:

JAXBContext jc = JAXBContext.newInstance(CalculateBorrowingDataResponseType.class, ObjectFactory.class);

或者在生成的类的包名称上创建JAXBContext:

String contextPath = CalculateBorrowingDataResponseType.class.getPackage().getName();
JAXBContext jc = JAXBContext.newInstance(contextPath);

完整的例子

package forum8809406;

import java.io.IOException;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.SchemaOutputResolver;
import javax.xml.transform.Result;
import javax.xml.transform.stream.StreamResult;

public class Demo {

    public static void main(String[] args) throws Exception {
        JAXBContext jc = JAXBContext.newInstance("forum8809406");
        jc.generateSchema(new SOR());
    }

    private static class SOR extends SchemaOutputResolver {

        @Override
        public Result createOutput(String namespaceUri, String suggestedFileName) throws IOException {
            StreamResult result = new StreamResult(System.out);
            result.setSystemId(suggestedFileName);
            return result;
        }

    }

}

我得到以下生成的XML模式,其中包含以下calculateBorrowingDataResponse元素:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xs:schema 
    version="1.0" 
    elementFormDefault="qualified" 
    targetNamespace="http://www.domain.com/ClientServices/LendingSimulation/CalculateBorrowingDataResponse" 
    xmlns:tns="http://www.domain.com/ClientServices/LendingSimulation/CalculateBorrowingDataResponse" 
    xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <xs:complexType name="CalculateBorrowingDataResponseType">
    <xs:sequence>
      <xs:element name="loanAgmt" type="tns:LoanAgreementType"/>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="LoanAgreementType">
    <xs:sequence>
      <xs:element name="borrowingBasedPmtAmt" type="xs:decimal" minOccurs="0"/>
      <xs:element name="maxPmtAmt" type="xs:decimal" minOccurs="0"/>
      <xs:element name="borrowingCapacityMin" type="xs:decimal" minOccurs="0"/>
      <xs:element name="borrowingCapacityMax" type="xs:decimal" minOccurs="0"/>
      <xs:element name="propertyValueMinAmt" type="xs:decimal" minOccurs="0"/>
      <xs:element name="propertyValueMaxAmt" type="xs:decimal" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="calculateBorrowingDataResponse" type="tns:CalculateBorrowingDataResponseType"/>
</xs:schema>