我有一个类似于：
的xml <alpha>
<beta>
<theta>abcd</theta>
</beta>
</alpha>
我想将theta元素映射到MyBean类中的属性thetaValue
@XmlRootElement(name = "alpha")
public class MyBean {
private String thetaValue;
public String getThetaValue() {
return this.thetaValue;
}
public void setThetaValue(String thetaValue) {
this.thetaValue= thetaValue;
}
}
有什么方法可以做到这一点吗？我正在使用JDK 1.6附带的jaxb
答案 0 :(得分：4)
注意：我是EclipseLink JAXB (MOXy)主管，是JAXB (JSR-222)专家组的成员。
使用任何JAXB（JSR-222）实施
使用任何JAXB（JSR-222）实现，您可以使用XmlAdapter来映射此用例。
的 ThetaValueAdapter 的
package forum9799081;
import javax.xml.bind.annotation.adapters.XmlAdapter;
public class ThetaValueAdapter extends XmlAdapter<ThetaValueAdapter.Beta, String> {
@Override
public Beta marshal(String string) throws Exception {
Beta beta = new Beta();
beta.theta = string;
return beta;
}
@Override
public String unmarshal(Beta beta) throws Exception {
return beta.theta;
}
public static class Beta {
public String theta;
}
}
的为myBean 的
package forum9799081;
import javax.xml.bind.annotation.*;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
@XmlRootElement(name = "alpha")
public class MyBean {
private String thetaValue;
@XmlElement(name="beta")
@XmlJavaTypeAdapter(ThetaValueAdapter.class)
public String getThetaValue() {
return this.thetaValue;
}
public void setThetaValue(String thetaValue) {
this.thetaValue = thetaValue;
}
}
的演示 的
package forum9799081;
import java.io.File;
import javax.xml.bind.*;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance(MyBean.class);
File xml = new File("src/forum9799081/input.xml");
Unmarshaller unmarshaller = jc.createUnmarshaller();
MyBean myBean = (MyBean) unmarshaller.unmarshal(xml);
Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(myBean, System.out);
}
}
的 input.xml中/输出 的
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<alpha>
<beta>
<theta>abcd</theta>
</beta>
</alpha>
使用EclipseLink JAXB（MOXy）
使用MOXy，您可以使用@XmlPath扩展名来实现相同的映射：
package forum9799081;
import javax.xml.bind.annotation.*;
import org.eclipse.persistence.oxm.annotations.XmlPath;
@XmlRootElement(name = "alpha")
public class MyBean {
private String thetaValue;
@XmlPath("beta/theta/text()")
public String getThetaValue() {
return this.thetaValue;
}
public void setThetaValue(String thetaValue) {
this.thetaValue = thetaValue;
}
}
了解更多信息