groovy解析xml

最新推荐文章于 2025-07-12 13:46:02 发布

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本文探讨了Groovy和Java在XML解析和生成中的应用，通过实例展示了如何使用Groovy的MarkupBuilder和XmlParser类进行XML操作，以及Java的XmlSlurper和StreamingMarkupBuilder类的功能。

XML解析提供了XmlParser、XmlSlurper类

XML生成提供了MarkupBuilder、StreamingMarkupBuilder类

XML操作: MarkupBuilder

MarkupBuilder (): Prints markup to System.out

import groovy.xml.*

def xml = new MarkupBuilder()
xml.langs("type":currecy){
     language("java")
     language("groovy")
     language("c++")
}

MarkupBuilder (PrintWriter pw): Sends markup to the given PrintWriter

import groovy.xml.*

def ps = new StringWriter()
def xml = new MarkupBuilder(ps)
xml.langs("type":currecy){
     language("java")
     language("groovy")
     language("c++")
}
println ps.toString()

XmlParser解析的是xml格式的字符串

import groovy.xml.*

def xml = """
<langs type="current">
  <language>Java</language>
  <language>Groovy</language>
  <language>JavaScript</language>
</langs>
"""

def langs = new XmlParser().parseText(xml)
println "type = ${langs.attribute("type")}"
langs.language.each{
  println it.text()
}

xml code

<langs type="current">
  <language>Java</language>
  <language>Groovy</language>
  <language>JavaScript</language>
</langs>

XmlParser进行xml解析

def langs = new XmlParser().parse("languages.xml")
println "type = ${langs.attribute("type")}"
langs.language.each{
  println it.text()
}

XML 示例：

<Results>
   <ResultSet fetchSize="128">
      <Row rowNumber="1">
         <ID>0000000001</ID>
         <YEAR>2015</YEAR>
         <MONTH>1</MONTH>
         <DID>25.4793</DID>
      </Row>
      <Row rowNumber="2">
         <ID>0000000001</ID>
         <YEAR>2015</YEAR>
         <MONTH>2</MONTH>
         <DID>20.6522</DID>
      </Row>
      <Row rowNumber="3">
         <ID>0000000001</ID>
         <YEAR>2015</YEAR>
         <MONTH>3</MONTH>
         <DID>20.6655</DID>
      </Row>
      <Row rowNumber="4">
         <ID>0000000001</ID>
         <YEAR>2015</YEAR>
         <MONTH>4</MONTH>
         <DID>21.9393</DID>
      </Row>
      <Row rowNumber="5">
         <ID>0000000001</ID>
         <YEAR>2015</YEAR>
         <MONTH>5</MONTH>
         <DID>21.9393</DID>
      </Row>
      <Row rowNumber="6">
         <ID>0000000001</ID>
         <YEAR>2015</YEAR>
         <MONTH>6</MONTH>
         <DID>22.2763</DID>
      </Row>
      <Row rowNumber="7">
         <ID>0000000001</ID>
         <YEAR>2015</YEAR>
         <MONTH>7</MONTH>
         <DID>20.9573</DID>
      </Row>
      <Row rowNumber="8">
         <ID>0000000001</ID>
         <YEAR>2015</YEAR>
         <MONTH>8</MONTH>
         <DID>20.9573</DID>
      </Row>
      <Row rowNumber="9">
         <ID>0000000001</ID>
         <YEAR>2015</YEAR>
         <MONTH>9</MONTH>
         <DID>21.2648</DID>
      </Row>
      <Row rowNumber="10">
         <ID>0000000001</ID>
         <YEAR>2015</YEAR>
         <MONTH>10</MONTH>
         <DID>19.7917</DID>
      </Row>
      <Row rowNumber="11">
         <ID>0000000001</ID>
         <YEAR>2015</YEAR>
         <MONTH>11</MONTH>
         <DID>19.7917</DID>
      </Row>
      <Row rowNumber="12">
         <ID>0000000001</ID>
         <YEAR>2015</YEAR>
         <MONTH>12</MONTH>
         <DID>19.9990</DID>
      </Row>
   </ResultSet>
</Results>

//Method 1
def node = 'DID'
directResult = xml.ResultSet.Row.grep{(it.YEAR.text() == '2015' && it.MONTH.text()== '12')}.getAt(node)
//output: [19.990]


//Method 2
directResult = xml.ResultSet.Row.find{
	if(it.YEAR.text() == '2015' && it.MONTH.text() == '12')
		return it.getAt(node).text()
	else 
		return ""	
}.getAt(node).text()
//output: 19.990