我的Jaxb基于XML模式设置创建了一个Enum类.
**enum Fruit {
APPLE,ORANGE;
}**
我正在使用SOAP UI来检查我的Web服务.因为它是一个自由形式的条目,如果我给错误的水果说“Guva”然后而不是抛出异常,它在做UnMarshalling之后将它返回为null.
我怎能避免这种情况？我应该使用自定义枚举类而不是JAXB生成的.请举个例子.即
问候
SRI
解决方法
注意：我是
EclipseLink JAXB (MOXy)领导者,也是
JAXB (JSR-222)专家组的成员.
默认情况下,您的JAXB(JSR-222)实现不会在任何转换异常上失败.如果您使用JAXB API进行解组,则可以设置ValidationEventHandler来捕获任何问题.以下是一个例子.
根
package forum12147306;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class Root {
private int number;
private Fruit fruit;
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
}
public Fruit getFruit() {
return fruit;
}
public void setFruit(Fruit fruit) {
this.fruit = fruit;
}
}
水果
package forum12147306;
public enum Fruit {
APPLE,ORANGE;
}
演示
package forum12147306;
import java.io.StringReader;
import javax.xml.bind.*;
public class Demo {
private static final String XML = "<root><number>ABC</number><fruit>Guva</fruit></root>";
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance(Root.class);
Unmarshaller unmarshaller = jc.createUnmarshaller();
unmarshaller.setEventHandler(new ValidationEventHandler() {
@Override
public boolean handleEvent(ValidationEvent validationEvent) {
System.out.println(validationEvent.getMessage());
//validationEvent.getLinkedException().printStackTrace();
return true;
}
});
Root root = (Root) unmarshaller.unmarshal(new StringReader(XML));
}
}
JAXB参考实施
不幸的是,JAXB RI中似乎存在一个错误,因为无效的枚举值没有通过验证事件.
Not a number: ABC
编写自己的XmlAdapter来处理与Fruit枚举的转换：
FruitAdapter
package forum12147306;
import javax.xml.bind.JAXBException;
import javax.xml.bind.annotation.adapters.XmlAdapter;
public class FruitAdapter extends XmlAdapter<String,Fruit> {
@Override
public String marshal(Fruit fruit) throws Exception {
return fruit.name();
}
@Override
public Fruit unmarshal(String string) throws Exception {
try {
return Fruit.valueOf(string);
} catch(Exception e) {
throw new JAXBException(e);
}
}
}
水果
使用@XmlJavaTypeAdapter批注将XmlAdapter与Fruit enumb相关联.
package forum12147306;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
@XmlJavaTypeAdapter(FruitAdapter.class)
public enum Fruit {
APPLE,ORANGE;
}
新产出
Not a number: ABC javax.xml.bind.JAXBException - with linked exception: [java.lang.IllegalArgumentException: No enum const class forum12147306.Fruit.Guva]
EclipseLink JAXB(MOXy)
使用MOXy抛出两个验证事件.要将MOXy指定为JAXB提供程序,请参阅：http://blog.bdoughan.com/2011/05/specifying-eclipselink-moxy-as-your.html.
Exception Description: The object [ABC],of class [class java.lang.String],from mapping [org.eclipse.persistence.oxm.mappings.XMLDirectMapping[number-->number/text()]] with descriptor [XMLDescriptor(forum12147306.Root --> [DatabaseTable(root)])],could not be converted to [class java.lang.Integer]. Internal Exception: java.lang.NumberFormatException: For input string: "ABC" Exception Description: No conversion value provided for the value [Guva] in field [fruit/text()]. Mapping: org.eclipse.persistence.oxm.mappings.XMLDirectMapping[fruit-->fruit/text()] Descriptor: XMLDescriptor(forum12147306.Root --> [DatabaseTable(root)])
