Java XML 输出 - 正确缩进子项
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原文地址: http://stackoverflow.com/questions/2571866/
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Java XML Output - proper indenting for child items
提问by Dr1Ku
I'd like to serialize some simple data model into xml, I've been using the standard java.org.w3c -related code (see below), the indentation is better than no "OutputKeys.INDENT", yet there is one little thing that remains - proper indentation for child elements.
我想将一些简单的数据模型序列化为 xml，我一直在使用标准的 java.org.w3c 相关代码（见下文），缩进比没有“OutputKeys.INDENT”要好，但还有一点剩下的东西 - 子元素的适当缩进。
I know that this has been asked before on stackoverflow, yet that configuration did not work for me, this is the code I'm using :
我知道这之前曾在 stackoverflow上被问过，但该配置对我不起作用，这是我正在使用的代码：
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.newDocument();
doc = addItemsToDocument(doc);
// The addItemsToDocument method adds childElements to the document.
TransformerFactory transformerFactory = TransformerFactory.newInstance();
transformerFactory.setAttribute("indent-number", new Integer(4));
// switching to setAttribute("indent-number", 4); doesn't help
Transformer transformer = transformerFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.METHOD, "xml");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
DOMSource source = new DOMSource(doc);
StreamResult result = new StreamResult(outFile);
// outFile is a regular File outFile = new File("some/path/foo.xml");
transformer.transform(source, result);
The output produced is :
产生的输出是：
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<stuffcontainer>
<stuff description="something" duration="240" title="abc">
<otherstuff />
</stuff>
</stuffcontainer>
Whereas I would want it (for more clarity) like :
而我想要它（为了更清楚），例如：
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<stuffcontainer>
<stuff description="something" duration="240" title="abc">
<otherstuff />
</stuff>
</stuffcontainer>
I was just wondering if there is a way of doing this, make it properly indented for the child elements.
我只是想知道是否有办法做到这一点，让它为子元素正确缩进。
Thank you in advance !
Happy Easter coding :-) !
先感谢您 ！
复活节快乐编码:-)！
回答by Chris Lercher
If the Transformer implementation you're using is Xalan-J, then you should be able to use:
如果您使用的 Transformer 实现是 Xalan-J，那么您应该能够使用：
transformer.setOutputProperty(
"{http://xml.apache.org/xslt}indent-amount", "5");
回答by Dr1Ku
import com.sun.org.apache.xml.internal.serializer.OutputPropertiesFactory
transformer.setOutputProperty(OutputPropertiesFactory.S_KEY_INDENT_AMOUNT, "4");
回答by iCrazybest
Document doc;
.....
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
transformer.transform(new DOMSource(doc), new StreamResult(new File("filename.xml")));
transformer.transform(new DOMSource(doc), new StreamResult(System.out));
