请查看我的下面groovy代码,它正在按预期工作 - 但是想知道是否有更好的方法来获取祖先信息?
我的示例xml记录:
String record = '''
<collections>
<material>
<books>
<title>Italy</title>
</books>
</material>
<material>
<books>
<title>Greece</title>
</books>
</material>
<material>
<books>
<author>Germany</author>
</books>
</material>
<material>
<cd>
<author>France</author>
</cd>
</material>
</collections>
'''
我想知道是否有更好的方法来优化获得祖先的这一点?
GPathResult extractedMaterialBlocks = extractAllMaterialBlocks(record)
String finalXml = serializeXml(extractedMaterialBlocks.parent().parent(), 'UTF-8')
println "finalXml : ${finalXml}"
我的方法:
GPathResult extractAllMaterialBlocks(String record) {
GPathResult result = new XmlSlurper().parseText(record)
return result ? result.'material'?.'books'?.'title'?.findAll { it } : null
}
String serializeXml(GPathResult xmlToSerialize, String encoding) {
def builder = new StreamingMarkupBuilder()
builder.encoding = encoding
builder.useDoubleQuotes = true
return builder.bind {
out << xmlToSerialize
}.toString()
}
按预期输出:
<material>
<books>
<title>Italy</title>
</books>
</material>
<material>
<books>
<title>Greece</title>
</books>
</material>
答案 0 :(得分:1)
如果你不潜水太深,你不需要得到祖先。如果你想要材质节点,那就让那些在孩子身上有条件而不是得到孩子的孩子然后再上去。您的整个代码可以压缩到这一行:
System.out.println new StreamingMarkupBuilder().bind { out << new XmlSlurper().parseText(record).material.findAll { it.books.title.size() } }
答案 1 :(得分:1)
在这里,内联评论:
//Get all the collection of materials which has titles
def materials = new XmlSlurper().parseText(record).material.findAll { it.books.title.size() }
//Print each node
materials.each { println groovy.xml.XmlUtil.serialize(it) }
输出:
<?xml version="1.0" encoding="UTF-8"?><material>
<books>
<title>Italy</title>
</books>
</material>
<?xml version="1.0" encoding="UTF-8"?><material>
<books>
<title>Greece</title>
</books>
</material>
您可以在线快速尝试 Demo
编辑:基于OP评论
def materials = new XmlSlurper().parseText(record).material.findAll { it.books.title.size() }
println new groovy.xml.StreamingMarkupBuilder().bind {
mkp.yield materials
}.toString()