本文介绍了JAXB是否支持在不进行编组/解组的情况下修改现有XML文档?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想在文档中保留注释,排序等,并使用Java界面就地编辑文档。
I want to keep comments, ordering, etc. in the document and edit the document in-place using a Java interface.
JAXB是否这样做?
Does JAXB do this?
其他工具如XMLBeans会这样做吗?
Do other tools such as XMLBeans do this?
推荐答案
你可以使用JAXB :
You can use the JAXB Binder
for this use case:
input.xml
<?xml version="1.0" encoding="UTF-8"?>
<customer>
<UNMAPPED_ELEMENT_1/>
<name>Jane Doe</name>
<!-- COMMENT #1 -->
<address>
<UNMAPPED_ELEMENT_2/>
<street>1 A Street</street>
<!-- COMMENT #2 -->
<UNMAPPED_ELEMENT_3/>
<city>Any Town</city>
</address>
<!-- COMMENT #3 -->
<UNMAPPED_ELEMENT_4/>
<phone-number type="home">555-HOME</phone-number>
<!-- COMMENT #4 -->
<phone-number type="cell">555-CELL</phone-number>
<UNMAPPED_ELEMENT_5/>
<!-- COMMENT #5 -->
</customer>
演示
import java.io.File;
import javax.xml.bind.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.*;
public class BinderDemo {
public static void main(String[] args) throws Exception {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
File xml = new File("input.xml");
Document document = db.parse(xml);
JAXBContext jc = JAXBContext.newInstance(Customer.class);
Binder<Node> binder = jc.createBinder();
Customer customer = (Customer) binder.unmarshal(document);
customer.getAddress().setStreet("2 NEW STREET");
PhoneNumber workPhone = new PhoneNumber();
workPhone.setType("work");
workPhone.setValue("555-WORK");
customer.getPhoneNumbers().add(workPhone);
binder.updateXML(customer);
TransformerFactory tf = TransformerFactory.newInstance();
Transformer t = tf.newTransformer();
t.transform(new DOMSource(document), new StreamResult(System.out));
}
}
输出
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<customer>
<UNMAPPED_ELEMENT_1/>
<name>Jane Doe</name>
<!-- COMMENT #1 -->
<address>
<UNMAPPED_ELEMENT_2/>
<street>2 NEW STREET</street>
<!-- COMMENT #2 -->
<UNMAPPED_ELEMENT_3/>
<city>Any Town</city>
</address>
<!-- COMMENT #3 -->
<UNMAPPED_ELEMENT_4/>
<phone-number type="home">555-HOME</phone-number>
<!-- COMMENT #4 -->
<phone-number type="cell">555-CELL</phone-number>
<phone-number type="work">555-WORK</phone-number>
<UNMAPPED_ELEMENT_5/>
<!-- COMMENT #5 -->
</customer>
更多信息
- http://bdoughan.blogspot.com/2010/09/jaxb-xml-infoset-preservation.html
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