您将需要创建一个包装器类以保留
Hashtable：
package forum7534500;import java.util.Hashtable;import javax.xml.bind.annotation.XmlRootElement;@XmlRootElementpublic class Wrapper { private Hashtable<String, String> hashtable; public Hashtable<String, String> getHashtable() { return hashtable; } public void setHashtable(Hashtable<String, String> hashtable) { this.hashtable = hashtable; }}然后，您可以执行以下操作：
package forum7534500;import java.io.StringWriter;import java.util.Hashtable;import javax.xml.bind.JAXBContext;import javax.xml.bind.JAXBException;import javax.xml.bind.Marshaller;public class Demo { public static void main(String[] args) throws Exception { JAXBContext jc = JAXBContext.newInstance(Wrapper.class); Wrapper wrapper = new Wrapper(); Hashtable<String, String> hashtable = new Hashtable<String,String>(); hashtable.put("foo", "A"); hashtable.put("bar", "B"); wrapper.setHashtable(hashtable); System.out.println(objectToXml(jc, wrapper)); } public static String objectToXml(JAXBContext jaxbContext, Object object) throws JAXBException { StringWriter writerTo = new StringWriter(); Marshaller marshaller = jaxbContext.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); marshaller.marshal(object, writerTo); //create xml string from the input object return writerTo.toString(); }}这将产生以下输出：
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><wrapper> <hashtable> <entry> <key>bar</key> <value>B</value> </entry> <entry> <key>foo</key> <value>A</value> </entry> </hashtable></wrapper>
注意事项
JAXBContext
是线程安全的对象，应创建一次并重用。Hashtable
已同步，如果不需要，则使用HashMap
替代。- 约定是以小写字母开头的Java方法名称。
自定义映射
您可以
XmlAdapter在JAXB中使用来自定义任何类的映射。以下是我博客上文章的链接，我将演示如何做到这一点：
- http://blog.bdoughan.com/2010/07/xmladapter-jaxbs-secret-weapon.html
