将Java对象转换为XML字符串 [英] Convert Java object to XML string

问题描述

是的，我知道有很多关于这个话题的问题。但我仍然无法找到解决问题的方法。我有一个属性注释的Java对象。例如，客户，在此示例中。我想要一个String表示它。谷歌建议将JAXB用于此类目的。但是在所有示例中，创建的XML文件都打印到文件或控制台，如下所示：

Yes, yes I know that lots of questions were asked about this topic. But I still cannot find the solution to my problem. I have a property annotated Java object. For example Customer, like in this example. And I want a String representation of it. Google reccomends using JAXB for such purposes. But in all examples created XML file is printed to file or console, like this:

File file = new File("C:\\file.xml");
JAXBContext jaxbContext = JAXBContext.newInstance(Customer.class);
Marshaller jaxbMarshaller = jaxbContext.createMarshaller();

// output pretty printed
jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

jaxbMarshaller.marshal(customer, file);
jaxbMarshaller.marshal(customer, System.out);

但我必须使用此对象并通过网络以XML格式发送。所以我想获得一个代表XML的String。

But I have to use this object and send over network in XML format. So I want to get a String which represents XML.

String xmlString = ...
sendOverNetwork(xmlString);

我该怎么做？

推荐答案

您可以使用Marshaler的编组方法来获取 Writer 作为参数：

You can use the Marshaler's method for marshaling which takes a Writer as parameter:

marshal（Object，Writer）

并传递一个可以构建String对象的实现

and pass it an Implementation which can build a String object

直接已知子类：
BufferedWriter，CharArrayWriter，FilterWriter，OutputStreamWriter，PipedWriter，PrintWriter， StringWriter

调用 toString 获取方法实际的字符串值。

Call its toString method to get the actual String value.

这样做：

StringWriter sw = new StringWriter();
jaxbMarshaller.marshal(customer, sw);
String xmlString = sw.toString();

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