groovy过滤器xml和打印 [英] groovy filter xml and print

问题描述

我想读取xml，过滤一些特定的类别并将结果写入屏幕或以xml格式存档。我无法找到XmlUtil.serialize或StreamingMarkupBuilder的正确类型。我在哪里可以找到XmlUtil.serialize或StreamingMarkupBuilder？

  def input ='''
< shopping> 
< category type =groceries> 
< item>巧克力< / item> 
< item> Coffee< / item> 
< / category> 
< category type =supplies> 
< item>纸张< / item> 
< item quantity =4>钢笔< / item> 
< / category> 
< category type =present> 
< item when =Aug 10>凯瑟琳的生日< / item> 
< / category> 
< / shopping> 
'''
 
 def root = new XmlSlurper（）。parseText（input）
 $ b $ def groceries = root.shopping.findAll {it。@ type == 'groceries'} 
 
 
 //这里我喜欢将过滤结果打印到文件/屏幕
 / **< category type =groceries> 
< item>巧克力< / item> 
< item> Coffee< / item> 
< / category> 
 ** / 
 println serializeXml（root）//我想在这里写'杂货'，但类型不是XmlUtil.serialize或StreamingMarkupBuilder的
 
 
 def String serializeXml（GPathResult xml）{
 XmlUtil.serialize（new StreamingMarkupBuilder（）。bind {
 mkp.yield xml 
}）
} 
  
 
 <$> 
 
 $ b 
解决方案
 p $ p $  import groovy.xml。* 
 $ b $ def def root = new XmlSlurper（）。parseText（input）
 $ b $ def groceries = root.children （）.findAll {it。@ type =='groceries'} 
 
 println XmlUtil.serialize（groceries）
  





 <？xml version =1.0encoding =UTF- 8？>< category type =groceries> 
< item>巧克力< / item> 
< item> Coffee< / item> 
< / category> 
  

或者您可以：

<$ p


















$打印：



 < category type ='groceries'>< item>巧克力< / item>< item>咖啡和LT; /项目>< /类别> 
  




I would like to read xml, filter for some specific 'category' and write the result to screen or to file as xml. I am not able to find the right type for XmlUtil.serialize or StreamingMarkupBuilder. Where can I find the XmlUtil.serialize or StreamingMarkupBuilder?

def input = '''
<shopping>
    <category type="groceries">
        <item>Chocolate</item>
        <item>Coffee</item>
    </category>
    <category type="supplies">
        <item>Paper</item>
        <item quantity="4">Pens</item>
    </category>
    <category type="present">
        <item when="Aug 10">Kathryn's Birthday</item>
    </category>
</shopping>
'''

def root = new XmlSlurper().parseText(input)

def groceries = root.shopping.findAll{ it.@type == 'groceries' }


// here I like to print the filtered result to file/screen
/**    <category type="groceries">
        <item>Chocolate</item>
        <item>Coffee</item>
    </category>
 **/
println serializeXml(root) // I would like to write here 'groceries' but the type is not something for XmlUtil.serialize or StreamingMarkupBuilder  


def String serializeXml(GPathResult xml){
    XmlUtil.serialize(new StreamingMarkupBuilder().bind {
        mkp.yield xml
      } )
}

解决方案

You can do:

import groovy.xml.*

def root = new XmlSlurper().parseText( input )

def groceries = root.children().findAll { it.@type == 'groceries' }

println XmlUtil.serialize( groceries )

To print:

<?xml version="1.0" encoding="UTF-8"?><category type="groceries">
  <item>Chocolate</item>
  <item>Coffee</item>
</category>

Or you could do:

println new StreamingMarkupBuilder().bind { mkp.yield groceries }

To print:

<category type='groceries'><item>Chocolate</item><item>Coffee</item></category>

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