这是我的 Groovy 代码:
// ...
def xml = new XmlParser().parse(fileName)
xml.each { e ->
// some changes are being made to XML
xml.append("test", "test me")
}
def writer = new FileWriter(newFileName)
new XmlNodePrinter(new PrintWriter(writer)).print(xml)
该代码可以工作,但输出 XML 有很多不必要的空格。看来我在写入文件时做错了什么。
附注感谢蒂姆,这就是它应该如何工作(上面示例的最后一行应替换为这三行):
def printer = new XmlNodePrinter(new PrintWriter(writer))
printer.preserveWhitespace = true
printer.print(xml)
如果替换会发生什么:
def writer = new FileWriter(newFileName)
new XmlNodePrinter(new PrintWriter(writer)).print(xml)
with:
new File( newFilename ).withWriter { out ->
printer = new XmlNodePrinter( out )
printer.preserveWhitespace = true
printer.print( xml )
}
-- edit --
正如所指出的,感觉应该是这样preserveWhitespace = false
,但是如果您尝试以下测试代码:
def x = """<langs type="current">
<language>Java</language>
<language>Groovy</language>
<language>JavaScript</language>
</langs>"""
def xml = new XmlParser().parseText( x )
xml.appendNode 'language', 'Ruby'
def printIt = { node, pw ->
println "With preserveWhitespace=$pw:"
def s = new StringWriter()
printer = new XmlNodePrinter( new PrintWriter( s ) )
printer.preserveWhitespace = pw
printer.print( xml )
println s
}
printIt xml, true
printIt xml, false
你得到输出:
With preserveWhitespace=true:
<langs type="current">
<language>Java</language>
<language>Groovy</language>
<language>JavaScript</language>
<language>Ruby</language>
</langs>
With preserveWhitespace=false:
<langs type="current">
<language>
Java
</language>
<language>
Groovy
</language>
<language>
JavaScript
</language>
<language>
Ruby
</language>
</langs>
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