Java：将 DOM 写入 XML 文件（格式问题）
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Java: Writing a DOM to an XML file (formatting issues)
提问by Vhaerun
I'm using org.w3cXML APIto open an existing XMLfile. I'm removing some nodes , and I'm adding others instead.
我正在使用org.w3cXML API打开现有XML文件。我正在删除一些节点，而我正在添加其他节点。
The problem is that the new nodes that are added are written one after the other, with no newline and no indentation what so ever. While it's true that the XMLfile is valid , it is very hard for a human to examine it.
问题是添加的新节点一个接一个地写入，没有换行符和缩进。虽然该XML文件确实有效，但人类很难对其进行检查。
Is there anyway to add indentation , or at least a newline after each node?
无论如何要在每个节点后添加缩进或至少一个换行符？
采纳答案by Chris Jester-Young
I'm assuming that you're using a Transformerto do the actual writing (to a StreamResult). In which case, do this before you call transform:
我假设您正在使用 aTransformer进行实际写作（到 a StreamResult）。在这种情况下，请在调用之前执行此操作transform：
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
回答by mlo55
There are a few good examples of "pretty printing" in the following thread
以下线程中有一些“漂亮打印”的好例子
how to pretty print xml from Java
回答by Thilina
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
source How to pretty print XML from Java?
source 如何从 Java 漂亮地打印 XML？
