我想使用JAXB解组一个xml文件。当我使用@XmlElement用正确的名称和命名空间解组作品(如@XmlElement(名称=“名字”,命名空间=“http://www.test.com”))使用JAXB解析xml - 使用XmlType和proporder的命名空间
如果我使用XmlType将一起与propOrder它不幸不再(例如@XmlType(namespace =“http://www.test.com”,name =“”,propOrder = {“name”,“description”}))。
xml文件(的test.xml)的含量:
<Operation xmlns="http://www.test.com">
<Parameter>
<name>Param1</name>
<description>Description of Parameter1</description>
</Parameter>
<Parameter>
<name>Param2</name>
<description>Description of Parameter2</description>
</Parameter>
</Operation>
JAXBExample.java的含量为:
package stackoverflow.problem.jaxb.ns;
import java.io.FileNotFoundException;
import java.io.FileReader;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
public class JAXBExample {
public static void main(String[] args) throws JAXBException, FileNotFoundException {
String xmlFilename = "test.xml";
JAXBContext context = JAXBContext.newInstance(Operation.class);
System.out.println("Output from our XML File: ");
Unmarshaller um = context.createUnmarshaller();
Operation op = (Operation) um.unmarshal(new FileReader(xmlFilename));
System.out.println("Operation-Content: " + op);
}
}
包stackoverflow.problem的含量。 jaxb.ns;
import java.util.List;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement(name="Operation", namespace="http://www.test.com")
@XmlAccessorType(XmlAccessType.FIELD)
public class Operation {
@XmlElement(name = "Parameter", namespace="http://www.test.com")
List<Parameter> parameterList;
@Override
public String toString(){
String retVal = "";
for(Parameter currentParameter: parameterList){
retVal += currentParameter.toString() + "\n";
}
return retVal;
}
}
而且Parameter.java的内容是:
package stackoverflow.problem.jaxb.ns;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
@XmlType(namespace="http://www.test.com", name = "", propOrder = {"name", "description"})
@XmlAccessorType(XmlAccessType.FIELD)
public class Parameter {
//@XmlElement(name = "name", namespace="http://www.test.com")
String name;
//@XmlElement(name = "description", namespace="http://www.test.com")
String description;
@Override
public String toString(){
return this.name + "\t" + this.description;
}
}
如果我取消在最后代码块(Parameter.java)两个@XmlElement线,解组工作正常。如果不包含这两行,那么Parameter对象中的两个字段都为空。在XmlType中使用propOrder时,是否有另一种方法来声明一个名称空间?还是我做了其他错误?
+1 - 更多有关JAXB和命名空间参见:http://blog.bdoughan.com/2010/08/jaxb-namespaces.html –
只需指出:它不仅不会因为不必将其放在每个字段中而使代码更加混乱,它也可以解决了在PropOrder中使用名称空间的问题。 – Exocom