在静态方法中创建新的JAXB Marshaller实例......是ThreadSafe吗？ [英] Create new JAXB Marshaller instance in static method... is it ThreadSafe?

问题描述

我使用以下静态方法实现了一个util类：

I have implemented a util class with the following static method:

public static String objToXml(JAXBContext jaxbContext, ClassA obj) throws Exception{
    Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
    jaxbMarshaller.setProperty( Marshaller.JAXB_FORMATTED_OUTPUT, true );
    StringWriter writer = new StringWriter();
    marshaller.marshal(obj, writer);
    return writer.toString();
}

我的理解是JAXB Marshaller和StringWriter都是线程安全的......但是我想双重确认我是否实现了这样的静态方法..并且有多个线程同时调用objToXml方法，是否会有任何潜在的问题？

My understanding is that JAXB Marshaller and StringWriter are both thread safe ... but I want to double confirm if I implement a static method like this.. and have multiple threads calling objToXml method concurrently, would there be any potential issue?

推荐答案

是的，如果你计划多线程使用它们，你必须每次创建一个新的 Marshaller 。

Yes you must create a new Marshaller each time around if you are planning to use them multi-threaded.

参见非官方的JAXB指南

JAXBContext类是线程安全的，但是Marshaller，Unmarshaller和Validator 类非线程安全。

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