Groovy JSON/GPath 查询答案

【问题标题】：Groovy JSON/GPath queryGroovy JSON/GPath 查询
【发布时间】：2012-09-11 22:15:07
【问题描述】：

鉴于以下 JSON，我想提取 postal_code（long_name 或 short_name）。我使用 JsonSlurper 将其摄取到变量中，并尝试使用 find/contains/etc 进行各种查询。抓取在其“类型”中具有“postal_code”但无法弄清楚的节点。非常感谢任何帮助。

{
   "results" : [
      {
         "address_components" : [
            {
               "long_name" : "Jefferson Ave",
               "short_name" : "Jefferson Ave",
               "types" : [ "route" ]
            },
            {
               "long_name" : "North Newport News",
               "short_name" : "North Newport News",
               "types" : [ "neighborhood", "political" ]
            },
            {
               "long_name" : "Newport News",
               "short_name" : "Newport News",
               "types" : [ "locality", "political" ]
            },
            {
               "long_name" : "Virginia",
               "short_name" : "VA",
               "types" : [ "administrative_area_level_1", "political" ]
            },
            {
               "long_name" : "United States",
               "short_name" : "US",
               "types" : [ "country", "political" ]
            },
            {
               "long_name" : "23608",
               "short_name" : "23608",
               "types" : [ "postal_code" ]
            }
         ],
         "formatted_address" : "Jefferson Ave & Denbigh Blvd, Newport News, VA 23608, USA",
         "geometry" : {
            "location" : {
               "lat" : 37.13852930,
               "lng" : -76.52013079999999
            },
            "location_type" : "APPROXIMATE",
            "viewport" : {
               "northeast" : {
                  "lat" : 37.13987828029151,
                  "lng" : -76.51878181970848
               },
               "southwest" : {
                  "lat" : 37.13718031970851,
                  "lng" : -76.52147978029149
               }
            }
         },
         "types" : [ "intersection" ]
      }
   ],
   "status" : "OK"
}

【问题讨论】：

标签： json groovy gpath

【解决方案1】：

下面应该找到 postal_code 类型的节点。如果 results 或 address_components 曾经有多个列表项，您将不得不通过用一些迭代替换索引访问来相应地进行调整，但希望这会有所帮助。

import groovy.json.*

def text = '''
{
   "results" : [
<omitted rest to save space>
....
}
'''

def json = new JsonSlurper().parseText(text)

def theNode = json.results[0]
                  .address_components
                  .find { it.types[0] == 'postal_code' }

assert '23608' == theNode.long_name

【讨论】：

@GaryWhite +1 如果正如约翰所说，您有多个结果或邮政编码，这应该可以：List codes = json.results.address_components*.findAll { 'postal_code' in it.types }.flatten().long_name