JAXB: JAXB的问题

Question

我们希望用JAXB和JAXB实现一个。我们有一个使用xml的PUT方法，如下所示：

<mailAccount>
    <id>-1</id>
    <name>test</name>
    <mailaddress>test@gmx.de</mailaddress>
    <password>1234</password>
    <servertype>IMAP</servertype>
    <host>hallo</host>
    <port>5678</port>
    <encryption>SSL/TLS</encryption>
    <authentication>true</authentication>
    <interval>12</interval>
</mailAccount>

我们还有一个映射到xml的MailAccount.class。

@XmlRootElement
public class MailAccount {

private String name;
private String mailaddress;
private String password;
private String servertype;
private String host;
private int port;
private String encryption;
private boolean authentication;
private int interval;
private int id;

getter + setter...
}

PUT-方法如下所示：

@PUT()
@Path("/addMailAccount")
@Consumes(MediaType.APPLICATION_XML)
@Produces(MediaType.TEXT_HTML)
public Response addMailAccount(JAXBElement<MailAccount> mail) throws Exception{
    MailAccount mailAccounts = mail.getValue();

    StringWriter sw = new StringWriter();

    JAXBContext jaxbContext = JAXBContext.newInstance(MailAccount.class);
    Marshaller jaxbMarshaller = jaxbContext.createMarshaller();

    jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

    jaxbMarshaller.marshal(mailAccounts, sw);

    String xmlConsume = sw.toString();

    Source source = new StreamSource(new StringReader(xmlConsume));

    SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
    Schema schema = sf.newSchema(MailAccountService.class.getResource("/emailAddresses.xsd"));

    Validator validator = schema.newValidator();

    //validator.validate(source);

    return Response.status(200).entity(xmlConsume +"..."+ mailAccounts.getMailadress()).build();
}

我们的目标是编组JAXB-元素，以根据XML验证它。但问题是编组:首先，元素没有按正确的顺序排列。每次使用propOrder标记都会导致内部服务器错误。

第二个问题是"mailaddress“元素是空的。它不是编组，当我将它放入这个方法的响应中时，它的值是空的。

以下是PUT方法返回的内容：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<mailAccount>
    <authentication>true</authentication>
    <encryption>SSL/TLS</encryption>
    <host>hallo</host>
    <id>-1</id>
    <interval>12</interval>
    <name>test</name>
    <password>1234</password>
    <port>5678</port>
    <servertype>IMAP</servertype>
</mailAccount>
...null

Answer 1

以下是一些应该有所帮助的项目：

propOrder

下面是将propOrder应用于类的示例。重要的是要记住，您需要包含映射到propOrder中的所有映射的字段/属性。

import javax.xml.bind.annotation.*;

@XmlRootElement
@XmlType(propOrder={"id", "name", "mailaddress", "password", "servertype", "host", "port", "encryption", "authentication", "interval"})
@XmlAccessorType(XmlAccessType.FIELD)
public class MailAccount {

    private String name;
    private String mailaddress;
    private String password;
    private String servertype;
    private String host;
    private int port;
    private String encryption;
    private boolean authentication;
    private int interval;
    private int id;

}

作为操作的一部分执行架构验证的

下面是一个独立的示例，演示如何利用模式验证作为封送处理操作的一部分，而不是将其作为单独的操作(请参阅：http://blog.bdoughan.com/2010/12/jaxb-and-marshalunmarshal-schema.html)。

import java.io.File;
import javax.xml.XMLConstants;
import javax.xml.bind.*;
import javax.xml.validation.*;

public class Demo {

    public static void main(String[] args) throws Exception {
        JAXBContext jc = JAXBContext.newInstance(MailAccount.class);

        Unmarshaller unmarshaller = jc.createUnmarshaller();
        File xml = new File("src/forum20699078/input.xml");
        MailAccount mailAccount = (MailAccount) unmarshaller.unmarshal(xml);

        Marshaller marshaller = jc.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

        SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
        Schema schema = sf.newSchema(MailAccountService.class.getResource("/emailAddresses.xsd"));
        marshaller.setSchema(schema);

        marshaller.marshal(mailAccount, System.out);
    }

}

Answer 2

对于那些必须用实现XML验证的人来说，这是我在上面提示之后使用的PUT方法。现在对我来说很好。

@PUT()
@Path("/addMailAccount")
@Consumes(MediaType.APPLICATION_XML)
@Produces(MediaType.TEXT_HTML)
public Response addMailAccount(JAXBElement<MailAccount> mail) throws MailAccountServiceException{
    String xmlConsume = "";

    try{
        MailAccount mailAccounts = mail.getValue();

        StringWriter sw = new StringWriter();

        JAXBContext jaxbContext = JAXBContext.newInstance(MailAccount.class);
        Marshaller jaxbMarshaller = jaxbContext.createMarshaller();

        jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

        SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
        Schema schema = sf.newSchema(MailAccountService.class.getResource("/mailAccount.xsd"));
        jaxbMarshaller.setSchema(schema);

        jaxbMarshaller.marshal(mailAccounts, sw);

        xmlConsume = sw.toString();
    }
    catch(Exception e){
        throw new MailAccountServiceException("Fehlerhafte Anfrage: " + e.getCause().getMessage());
    }

    return Response.status(200).entity(xmlConsume).build();
}