Java jaxb 实体打印为 xml
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jaxb entity print out as xml
提问by Cristian Boariu
I have a class, let's call it Userannotated with @XmlRootElement, with some properties (name, surname etc).
我有一个类，我们称之为User注释@XmlRootElement，带有一些属性（姓名、姓氏等）。
I use this class for REST operations, as application/xml.
我将此类用于 REST 操作，如application/xml.
The client will POST User class so i want to keep the values in the log.
客户端将 POST User 类，因此我想将这些值保留在日志中。
Is there any method in jaxb to prints out this object as xml?
jaxb 中是否有任何方法可以将此对象打印为 xml？
For instance:
例如：
log.info("Customers sent: "+user.whichMethod());
should produce this output:
应该产生这个输出：
Customer sent:
<user> <name>cristi</name> <surname>kevin</surname> </user>
Thanks.
谢谢。
采纳答案by Cristian Boariu
Found:)
成立：）
public void toXml() {
try {
JAXBContext ctx = JAXBContext.newInstance(User.class);
Marshaller marshaller = ctx.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
marshaller.marshal(this, System.out);
}
catch (Exception
e) {
//catch exception
}
}
Call it like:
像这样称呼它：
log.info("Customers sent: "+user.toXml());
回答by java25
You can make this as a common method accessible by your endpoints.
您可以将此作为端点可访问的常用方法。
public String toXml(JAXBElement element) {
try {
JAXBContext jc = JAXBContext.newInstance(element.getValue().getClass());
Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
marshaller.marshal(element, baos);
return baos.toString();
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
回答by Jin Kwon
Setting Marshaller.JAXB_FORMATTED_OUTPUTmay be not good for logging.
设置Marshaller.JAXB_FORMATTED_OUTPUT可能不利于日志记录。
Instead suppress XML Prolog (or Declaration)with Marshaller.JAXB_FRAGMENT.
而是XML Prolog (or Declaration)用Marshaller.JAXB_FRAGMENT.
public static <J> String printXml(final J instance) throws JAXBException {
return printXml(instance, instance.getClass());
}
public static <J> String printXml(final J instance,
final Class<?>... classesToBeBound)
throws JAXBException {
final JAXBContext context = JAXBContext.newInstance(classesToBeBound);
final ByteArrayOutputStream output = new ByteArrayOutputStream();
final Marshaller marshaller = context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);
marshaller.marshal(instance, output);
// output.flush(); // Nasty IOException
final String jaxbEncoding = (String) marshaller.getProperty(
Marshaller.JAXB_ENCODING);
try {
return new String(output.toByteArray(), jaxbEncoding);
} catch (UnsupportedEncodingException uee) {
throw new RuntimeException(uee);
}
}
will prints a single line like this.
将打印这样的一行。
<user><name>cristi</name><surname>kevin</surname></user>
回答by Nagarjuna
public String toXml(Event event) {
ByteArrayOutputStream baos = null;
try {
JAXBContext jc = JAXBContext.newInstance(event.getClass());
Marshaller marshaller = jc.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
baos = new ByteArrayOutputStream();
marshaller.marshal(event, baos);
return baos.toString();
} catch (JAXBException e) {
LOGGER.log(Level.SEVERE, " problem in Logging raw XML :"+e.getMessage());
}
return baos.toString();
This Works well
这很好用
