Groovy中的xml操作

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ChangQin 12月 13, 2018

解析xml数据

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final String xml = '''
    <response version-api="2.0">
        <value>
            <books id="1" classification="android">
                <book available="20" id="1">
                    <title>疯狂Android讲义</title>
                    <author id="1">李刚</author>
                </book>
                <book available="14" id="2">
                   <title>第一行代码</title>
                   <author id="2">郭林</author>
               </book>
               <book available="13" id="3">
                   <title>Android开发艺术探索</title>
                   <author id="3">任玉刚</author>
               </book>
               <book available="5" id="4">
                   <title>Android源码设计模式</title>
                   <author id="4">何红辉</author>
               </book>
           </books>
           <books id="2" classification="web">
               <book available="10" id="1">
                   <title>Vue从入门到精通</title>
                   <author id="4">李刚</author>
               </book>
           </books>
       </value>
    </response>
'''
def xmlSluper = new XmlSlurper()
def resp = xmlSluper.parseText(xml)
println resp.value.books[1].book[0].title.text()

Vue从入门到精通

xml数据简单查找

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//xml，resp同上 
def list = []
resp.value.books.each {books->
    books.book.each { book ->
        def author =  book.author.text()
        if (author == '李刚'){
            list.add(book)
        }
    }
}
println list.toListString()

[疯狂Android讲义李刚, Vue从入门到精通李刚]

深度遍历

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//深度遍历
def titles1 = resp.depthFirst().findAll {book ->
    return book.author.text() == '李刚'
}
def titles2 = resp.depthFirst().findAll {node ->
    node.name() == 'book' && node.@id == '2'
}
println titles1
println titles2

[疯狂Android讲义李刚, Vue从入门到精通李刚]

[第一行代码郭林]

广度遍历

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//广度遍历
def name = resp.value.books.children().findAll { node->
    node.name() == 'book' && node.@id=='2'
}
println name

第一行代码郭林

生成xml

Groovy中生成xml用的是MarkupBuilder

例如要生成如下的xml文档

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<langs type='current' count='3' mainstream='true'>
 <language flavor='static' version='1.5'>Java</language>
 <language flavor='dynamic' version='1.6.0'>Groovy</language>
 <language flavor='dynamic' version='1.9'>JavaScript</language>
 </langs>
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def sw = new StringWriter()
def xmlBuilder = new MarkupBuilder(sw)
xmlBuilder.langs(type: 'current', count: '3', mainstream: 'true') {
    language(flavor: 'static', version: '1.5', "Java")
    language(flavor: 'dynamic', version: '1.6', "Groovy")
    language(flavor: 'dynamic', version: '1.9', "JavaScript")
}
println sw

Java
Groovy
JavaScript

一般我们生成xml都是用实体对象动态生成的

定义class如下

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//对应xml中的Langs结点
class Langs {
    String type = "current"
    int count = 3
    boolean mainstream = true
    def language = [new Language(flavor: "static", version: 1.5, value: "java"),
                    new Language(flavor: "dynamic", version: 1.6, value: "Groovy"),
                    new Language(flavor: "dynamic", version: 1.9, value: "JavaScript")]
}
//对应xml中的language结点
class Language {
    String flavor
    String version
    String value
}
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def langs = new Langs()
xmlBuilder.langs(type: langs.type, count: langs.count, mainstream: langs.mainstream) {
    langs.language.each { lang ->
        language(flavor: lang.flavor,
                version: lang.value,
                lang.value)
    }
}
println sw

上面的生成方式也是可以的

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