Groovy：我如何使用key的值搜索json并在groovy中查找它的子节点 [英] Groovy : how do i search json with key's value and find its children in groovy

问题描述

  [
 {
createTime：2014-05-12 04：51：46.513343，
powered：false，
description：s，
current：false，
children：[
 {
createTime：2014-05-13 03 ：
powered：false，
description：快照描述，
当前：false，
children：[
 {
createTime：2014-05-13 03：57：08.209319，
powered：false，
description：s，
 current：false，
children：[
 {
createTime：2014-05-13 04：27：00.646064，
powered：false ，
description：s，
current：false，
label：snap3
 }，
 {
createTime：2014-05-13 21：00：16.374178，
powered：false，
description：sd， 
current：false，
label：sddsds
} 
]，
label：snap2
} 
 $，
label：snapshot-name5
}，
 {
createTime：2014-05-14 00：49：33.415858，
powered：false，
description：a，
current：false，
children：[
 {
 createTime：2014-05-14 02：35：10.076829，
powered：false，
description：sdfsdfsdf，
current：true，
 label：ssfsdf
} 
]，
label：assa
} 
]，
label：snap1 
 
 
 $ / code $ / pre 
 $ b $ p这里我有标签'snap2'作为输入我需要得到它的孩子的标签（snap3，sddsds）作为输出。如何在groovy中做到这一点？我搜查了很多东西，但我找不到解决方案。
 
 
 
如果我能从你们任何一个人那里得到一个意见，那将是非常棒的。假设你的json是一个字符串 jsonTxt ，你可以这样做：  
 
 
  def json = new groovy.json.JsonSlurper（）。parseText（jsonTxt）
 
 def如果（map [key] == value）{map.children} 
 else {map.children .findResult {recursiveChildrenScan（it，key，value）}} 
} 
 
 println json.findResult {recursiveChildrenScan（it，'label'，'snap2'）}？.label 
  
 
[
{
    "createTime": "2014-05-12 04:51:46.513343",
    "powered": false,
    "description": "s",
    "current": false,
    "children": [
        {
            "createTime": "2014-05-13 03:50:43.050442",
            "powered": false,
            "description": "Snapshot description",
            "current": false,
            "children": [
                {
                    "createTime": "2014-05-13 03:57:08.209319",
                    "powered": false,
                    "description": "s",
                    "current": false,
                    "children": [
                        {
                            "createTime": "2014-05-13 04:27:00.646064",
                            "powered": false,
                            "description": "s",
                            "current": false,
                            "label": "snap3"
                        },
                        {
                            "createTime": "2014-05-13 21:00:16.374178",
                            "powered": false,
                            "description": "sd",
                            "current": false,
                            "label": "sddsds"
                        }
                    ],
                    "label": "snap2"
                }
            ],
            "label": "snapshot-name5"
        },
        {
            "createTime": "2014-05-14 00:49:33.415858",
            "powered": false,
            "description": "a",
            "current": false,
            "children": [
                {
                    "createTime": "2014-05-14 02:35:10.076829",
                    "powered": false,
                    "description": "sdfsdfsdf",
                    "current": true,
                    "label": "ssfsdf"
                }
            ],
            "label": "assa"
        }
    ],
    "label": "snap1"
}
]
Here I have the label 'snap2' as input and I need to get its children's labels (snap3, sddsds) as output.. How do I do it in groovy? I searched a lot of stuff, but I'm not able to find a solution.. 


It would be great if I could get a sugggestion from any of you.
解决方案
Assuming your json is in a String jsonTxt, you can do:
def json = ​new groovy.json.JsonSlurper().parseText( jsonTxt )

def recursiveChildrenScan( map, key, value ) {
    if( !map ) { null }
    else if( map[ key ] == value ) { map.children }
    else { map.children.findResult { recursiveChildrenScan( it, key, value ) } }
}

println json.findResult { recursiveChildrenScan( it, 'label', 'snap2' ) }​?.label​


                        
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