我想以编程方式在Java中生成xml字符串,其名称空间是自定义的,如下所示,并且所有数据都必须动态添加到xml中。如何实现这样的功能?
<faxml xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="test.xsd">
<person>
<name>ABC</name>
</person>
</faxml>
我已经看过像https://howtodoinjava.com/jaxb/write-object-to-xml/这样的示例,但是在这里,当xml生成时,它的起始行是
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
但我希望将<faxml>
示例代码中提到的开始和结束标记以及名称空间作为输出
这是一种方法:
首先,这是我的类,表示所需的XML数据:
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Person
类嵌套在根类中-仅用于此测试。当然,还有其他安排这些类的方法,因此它们不是嵌套的。
然后我将package-info
for 定义org.ajames.jaxb.persons
如下:
@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对象转换为XML,我使用以下测试数据:
Faxml.Person person = new Faxml.Person();
person.setName("ABC");
Faxml faxml = new Faxml();
faxml.setPerson(person);
假设我们为此测试将XML写入Java String,JAXB上下文和编组器如下所示:
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为:
<faxml xsi:noNamespaceSchemaLocation="test.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<person>
<name>ABC</name>
</person>
</faxml>
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