使用自定义命名空间在 java 中创建 XML 字符串

Question

我想在java中以编程方式生成xml字符串，其名称空间是自定义的，如下所示，所有数据必须以xml格式动态出现。我怎样才能达到这样的成就？

<faxml xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="test.xsd">
<person>
  <name>ABC</name>
</person>
</faxml>

我经历过像https://howtodoinjava.com/jaxb/write-object-to-xml/这样的例子，但是当xml生成时，它的起点是

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

但我想要开始和结束标记




Answer 1

    String name= "name"     
    String createXml="<faxml xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"//
                      xsi:noNamespaceSchemaLocation="test.xsd">"//
                      +"<person>"//
                      +"<name>"+name+"</name>"//
                      +"</>person">"//
                      +"</faxml>";
                    Sysout(createXml);

在变量中获取名称。硬编码这些行并像这样插入…

Answer 2

匿名用户

这里有一种方法:

首先，这里是表示所需XML数据的类：

package org.ajames.jaxb.persons;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "")
@XmlRootElement(name = "faxml")
public class Faxml {
    
    private Person person;
    
    public static class Person {
        
        private String name;

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }
        
    }

    public Person getPerson() {
        return person;
    }

    public void setPerson(Person person) {
        this.person = person;
    }
    
}

我选择将＜code＞Person＜/code＞类嵌套在根类中——仅用于此测试。当然，还有其他方法来排列这些类，所以它们不是嵌套的。

然后，我为< code > org . ajames . JAXB . persons 定义< code>package-info,如下所示:

@XmlSchema(
        namespace = "",
        elementFormDefault = XmlNsForm.UNSET,
        xmlns = {
            @XmlNs(prefix = "", namespaceURI = "http://www.w3.org/2001/XMLSchema-instance")
        })
package org.ajames.jaxb.persons;

import javax.xml.bind.annotation.XmlSchema;
import javax.xml.bind.annotation.XmlNs;
import javax.xml.bind.annotation.XmlNsForm;

为了将数据从Java对象处理成XML，我使用了以下测试数据:

Faxml.Person person = new Faxml.Person();
person.setName("ABC");
Faxml faxml = new Faxml();
faxml.setPerson(person);

JAXB上下文和编组器如下所示，假设我们正在将XML写入Java字符串，用于此测试：

JAXBContext jaxbContext = JAXBContext.newInstance(Faxml.class); 
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);
marshaller.setProperty(Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION, "test.xsd");
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
        
StringWriter stringWriter = new StringWriter();
marshaller.marshal(faxml, stringWriter);
String xml = stringWriter.toString();
        
System.out.println(xml);

生成的 XML 是：

<faxml xsi:noNamespaceSchemaLocation="test.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <person>
        <name>ABC</name>
    </person>
</faxml>