Java: Marshalling Object -- 删除 xml 中多余的 ns2 注释

2022-09-02 12:54:03

我正在尝试根据定义的架构将对象中的数据编组到xml文件中。但是,当我打印出 xml 文件时,我会收到有关 xml 标记的额外批注。有没有办法摆脱额外的命名空间注释(即ns2)

这是我从编组接收的 xml 的一个示例。

<?xml version="1.0" encoding="UTF-8" standalone="yes">
<root xmlns:ns2="http://www.something.com/something">
    <ns2:food>steak</ns2:food>
    <ns2:beverage>water</ns2:beverage>
</root>

我想要的是这样的东西:

<?xml version="1.0" encoding="UTF-8" standalone="yes">
<root xmlns="http://www.something.com/something">
    <food>steak</food>
    <beverage>water</beverage>
</root>

这就是我的Java代码正在做的事情:

            JAXBContext context = JAXBContext.newInstance("com.schema");
            JAXBElement<FoodSchema> element = new JAXBElement<FoodSchema>
                (new QName("FoodSchema"), Food.class, foodSchema);
            Marshaller marshaller = context.createMarshaller();
            OutputStream os = new FileOutputStream(object.getFilePath());
            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); 
            marshaller.marshal(element, os);

任何帮助都非常感谢!谢谢!


答案 1

通过将命名空间 URI(“http://www.something.com/something”)添加到用于构造 JAXB 元素的 中,并利用包级注释将为您提供所需的命名空间限定:QName@XmlSchema

软件包信息

@XmlSchema(
    namespace="http://www.something.com/something", 
    elementFormDefault=XmlNsForm.QUALIFIED)
package forum7014746;

import javax.xml.bind.annotation.*;

食物

package forum7014746;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Food {

    private String food;
    private String beverage;

    public String getFood() {
        return food;
    }

    public void setFood(String food) {
        this.food = food;
    }

    public String getBeverage() {
        return beverage;
    }

    public void setBeverage(String beverage) {
        this.beverage = beverage;
    }

}

演示

package forum7014746;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Marshaller;
import javax.xml.namespace.QName;

public class Demo {

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

        Food foodSchema = new Food();
        foodSchema.setFood("steak");
        foodSchema.setBeverage("water");

        JAXBElement<Food> element = new JAXBElement<Food> (new QName("http://www.something.com/something","FoodSchema"), Food.class, foodSchema);

        Marshaller marshaller = jaxbContext.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.marshal(element, System.out);
    }

}

输出

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<FoodSchema xmlns="http://www.something.com/something">
    <beverage>water</beverage>
    <food>steak</food>
</FoodSchema>

答案 2

添加到 xsd 架构定义元素表单默认值属性表单默认值

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" ...
elementFormDefault="qualified" attributeFormDefault="unqualified" ... >

推荐