Question

我有一个正常运行的ColdFusion 11站点，它引入一个JSON文件并反序列化它，我能够输出内容。有效的JSON看起来像这样：

[
 {"body":"some text goes here", 
  "link":"a link is here",
  "name":"name of product goes here",
  "language":"language goes here",
  "tags":["tag1","tag2","tag3","tag4"],
  "initiative":"initiative content goes here",
  "start_date":"start date goes here",
  "categories":["cat1","cat2","cat3"]
  }

现在他们给了我一个新的JSON文件，它有更多的级别，我无法弄清楚如何降低到同一数据的新级别。

NEW JSON

[
 {
  "self_study":
   [
    {
     "categories":["Cat1","Cat2"],
     "link":"some link",
     "initiative":"initiative content goes here",
     "language":"language goes here",
     "name":"name of product",
     "tags":["tag1","tag2","tag3","tag4"],
     "body":"some text goes here"
    }
   ],
  "scheduled":
   [
    {
     "categories":["Cat1","Cat2"],
     "link":"some link",
     "initiative":"initiative content goes here",
     "language":"language goes here",
     "name":"name of product",
     "tags":["tag1","tag2","tag3","tag4"],
     "body":"some text goes here"
    }
   ]
 }
]

使用第一个JSON文件，我可以使用CFLOOP循环访问数据

<cffile action="read" file="#ExpandPath("./MoocJson.json")#" variable="myxml">
<cfset mydoc = deserializedJSON(myxml)>
<cfdump var="#mydoc#">   <!--- this dumps out the JSON in Array format --->

<cfoutput> My Doc Length = #arraylen(mydoc)#</cfoutput>

<!--- Loop through Array of mydoc and out put content --->
<cfoutput>
<cfloop from="1" to="#arrayLen(mydoc)#" index="i">
<cfset Course = mydoc[i]>

#Course.Name# <br>
#Course.body# <br>
#Course.language# <br>
#Course.link# <br>
#Course.initiative# <br>
#Course.start_date# <br>
#ArrayToList(Course.tags)# <br>
#ArrayToList(Course.categories)# <br>

</cfloop>
</cfoutput>
<!--- End of Code --->

对于CFDUMP，我得到了这个结构：

Array(1)
 Struct(scheduled)
   Array(1)
    Struct(my data)
 Struct(self_study)
   Array(1)
    Struct(my data)

关于如何向下浏览多级JSON的任何想法？

Answer 1

在JSON数组中，方括号[]和花括号{}中的结构。

对JSON进行反序列化的调用会为您完成所有工作。将第二个文件作为包含结构数组的结构数组。

所以如果你想要每个数组的第一个元素：

mydoc[1].self_study[1].categories[1]
mydoc[1].self_study[1].initiative

显然，您可以使用数组上的所有数组操作和结构上的结构操作。希望这足以让你前进。

ColdFusion 11读取多层JSON文件

1 个答案: