我有一个@XmlAccessorType(XmlAccessType.FIELD)
注释的类,每个private
和protected
字段都用@XmlElement(name='...')
注释。
我相信JaxB的一些实现允许XML配置覆盖注释。在这种情况下,这实际上是可能的。这是一篇来自Eclipslink的文章,解释了如何做到这一点http://www.eclipse.org/eclipselink/documentation/2.4/solutions/jpatoxml004.htm
在我看来,您可以为要覆盖的JaxB文件构建一个XML配置。
我首先尝试用@XmlAccessorType(XmlAccessType.FIELD)
和@XmlTransient
隐藏。这只有在你用@XmlTransient
标记父类和子类中的字段时才有效。但我想,这不是你想要的。
作为第二种方法,我在超类中尝试了更严格的@XmlAccessorType(XmlAccessType.PROPERTY)
,在子类中尝试了@XmlAccessorType(XmlAccessType.NONE)
。请看我的例子:
package com.so.example;
import java.util.ArrayList;
import java.util.List;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
@Path("/myresource")
public class MyResource {
@GET
@Path("/car")
@Produces(MediaType.APPLICATION_XML)
public Car getCar() {
Car car = new Car();
car.setWheels(4);
return car;
}
@GET
@Path("/suv")
@Produces(MediaType.APPLICATION_XML)
public Suv getSuv() {
Suv suv = new Suv();
List<String> bigWheels = new ArrayList<>();
bigWheels.add("left front wheel");
bigWheels.add("right front wheel");
bigWheels.add("left rear wheel");
bigWheels.add("right rear wheel");
suv.setBigWheels(bigWheels);
return suv;
}
}
汽车类:
package com.so.example;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
@XmlAccessorType(XmlAccessType.PROPERTY)
@XmlRootElement
public class Car {
protected Integer wheels;
public Car() {
}
@XmlElement(name = "wheels", nillable = true)
public Integer getWheels() {
return wheels;
}
public void setWheels(Integer wheels) {
this.wheels = wheels;
}
}
类别Suv (Child):
package com.so.example;
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;
import javax.xml.bind.annotation.XmlTransient;
@XmlRootElement
@XmlAccessorType(XmlAccessType.NONE)
public class Suv extends Car {
@XmlTransient
private Integer wheels;
private List<String> bigWheels;
public Suv() {
}
@Override
@XmlTransient
public Integer getWheels() {
return wheels;
}
@Override
public void setWheels(Integer wheels) {
this.wheels = wheels;
}
@XmlElement
public List<String> getBigWheels() {
return bigWheels;
}
public void setBigWheels(List<String> bigWheels) {
this.bigWheels = bigWheels;
}
}
"隐藏"超类的元素轮的一种方法是将其标记为"nillable=true",并且不使用基本类型。在本例中,字段轮将被编组到<wheels xsi:nil="true"/>
如果可以不使用父类进行封送,而只使用子类,则可以使用下面描述的方法:
http://blog.bdoughan.com/2011/06/ignoring-inheritance-with-xmltransient.html你也可以使用moxy并指定一个自定义绑定:http://www.eclipse.org/eclipselink/documentation/2.4/moxy/runtime003.htm
而在java中,据我所知,重写注释@XmlElement(name='...')
以改变name
属性是不可能的;你可以在你的代码中创建一个全局变量,并在@XmlElement(name='...')
之后通过你的类或函数传递它。
在下面的代码中,我创建了一个类,但它包含了setter和getter方法,如果你想把它传递给另一个类
@XMLAccessorType(XMLAccessType.FIELD)
public class YourClass {
@XmlTransient
private String string = ""; //This can be replaced with whatever variable you are manipulating
//That could be an int or a file or anything really
@XmlElement(name = "your_name")
private void doSomething() {
String temp = getString(); //This variable is normally used to pass between different
//classes but may as well use it if you have one
//Your code which manipulates the String
setString(temp); //This variable is normally used to pass between different classes but
//may as well use it if you have one
}
@XmlElement(name = "your_other_name")
private void doSomethingElse() {
String temp = getString();
//Your code which manipulates the String
setString(temp);
}
public void getString() {
return string;
}
public void setString(String string) {
this.string = string;
}
}
我建议查看@XmlTransient
的Java文档和其他两个相关的SO问题。
如何重写JAXB @XMLAccessorType(XMLAccessType.FIELD)指定在类级别与@XMLElement getter方法上的属性?
Jaxb -重写XMLElement name属性