用Transformer缩进XML文本 [英] indent XML text with Transformer

问题描述

  Source source = new DOMSource（rootElement）; 
结果结果=新的StreamResult（xmlFile）; 
变压器变压器= TransformerFactory.newInstance（）。newTransformer（）; 
 transformer.setOutputProperty（OutputKeys.INDENT，yes）; 
 transformer.transform（source，result）; 
  

这是输出文件：

 <？xml version =1.0encoding =UTF-8？> 
< feature-sequences> 
< sequence> 
<初始帧> 0< /初始帧> 
< points> 
< point> 
< x> 274.0< / x> 
< y> 316.0< / y> 
< / point> 
 ... 
  

我希望这个文件被缩进，例如：

 <？xml version =1.0encoding =UTF-8？> 
< feature-sequences> 
< sequence> 
<初始帧> 0< /初始帧> 
< points> 
< point> 
< x> 274.0< / x> 
< y> 316.0< / y> 
< / point> 
 ... 
  

调用 setOutputProperty 在我的代码没有解决问题，它实际上使新文本行（但不缩进）。

任何人有一个解决方案，没有是否需要外部库？

解决方案

您可能必须指定要缩进的空格数量。 b
$ b

  transformer.setOutputProperty（{http://xml.apache.org/xslt}indent-amount，4）; 
  

I'm writing an XML file with the following code:

Source source = new DOMSource(rootElement);
Result result = new StreamResult(xmlFile);
Transformer transformer = TransformerFactory.newInstance().newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.transform(source, result);

and this is the output file:

<?xml version="1.0" encoding="UTF-8"?>
<feature-sequences>
<sequence>
<initial-frame>0</initial-frame>
<points>
<point>
<x>274.0</x>
<y>316.0</y>
</point>
...

I want this file to be indented, for example:

<?xml version="1.0" encoding="UTF-8"?>
<feature-sequences>
  <sequence>
    <initial-frame>0</initial-frame>
    <points>
      <point>
        <x>274.0</x>
        <y>316.0</y>
      </point>
...

the call to setOutputProperty in my code doesn't solve the problem, it actually makes the text with new lines (but not indented).

anyone has a solution to this, without the need of external libraries?

解决方案

You may have to specify the amount of spaces to indent as well:

transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");

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