可能重复:
可以将JSON字符串转换为Ruby对象吗?我想用类似如下的表达式来访问它的信息:
drawer.stations.tv.header
JSON字符串:
{
"drawer" : {
"stations" : {
"tv" : {
"header" : "TV Channels",
"logos" : {
"one" : "www1",
"two" : "www2",
"three" : "www3"
}
}
}
}
}
发布于 2012-12-16 17:46:40
您可以将字符串解析为拼音散列,然后将其转换为Mash。Mash为您提供了类似方法的访问。
require 'json'
require 'hashie'
hash = JSON.parse json_string
obj = Hashie::Mash.new hash
obj.drawer.stations.tv.header # => "TV Channels"
更新
你也可以在没有第三方gem的情况下,使用ruby自己的OpenStruct
require 'ostruct'
require 'json'
obj = JSON.parse(json_string, object_class: OpenStruct)
obj.drawer.stations.tv.header # => "TV Channels"
发布于 2012-12-16 09:43:47
如果你把这个字符串解析成ruby对象,它会返回一个ruby Hash对象,你可以这样得到它
ruby_obj = JSON.parse(json_string)
ruby_obj['drawer']['stations']['tv']['header']
发布于 2012-12-16 17:22:53
require 'json'
json_info = %q(
{
"drawer" : {
"stations" : {
"tv" : {
"header" : "TV Channels",
"logos" : {
"one" : "www1",
"two" : "www2",
"three" : "www3"
}
}
}
}
}
)
class MyJson
def self.for(p_jason_string)
self.new(JSON.parse(p_jason_string))
end
def initialize(p_info)
@info = p_info
end
def inspect
@info.inspect
end
def method_missing(p_missing_method_name)
print 'mm '; p p_missing_method_name
key = p_missing_method_name.to_s
if @info.has_key?(key)
then
MyJson.new(@info[key])
else
puts "no key #{p_missing_method_name}"
end
end
end # class MyJson
holder = MyJson.for(json_info)
puts '-----holder.drawer'
p holder.drawer
puts '-----holder.drawer.stations'
p holder.drawer.stations
puts '-----holder.drawer.stations.tv.header'
p holder.drawer.stations.tv.header
执行:
$ ruby -v
ruby 1.9.2p320 (2012-04-20 revision 35421) [x86_64-darwin12.2.0]
$ ruby -w t.rb
-----holder.drawer
mm :drawer
{"stations"=>{"tv"=>{"header"=>"TV Channels", "logos"=>{"one"=>"www1", "two"=>"www2", "three"=>"www3"}}}}
-----holder.drawer.stations
mm :drawer
mm :stations
{"tv"=>{"header"=>"TV Channels", "logos"=>{"one"=>"www1", "two"=>"www2", "three"=>"www3"}}}
-----holder.drawer.stations.tv.header
mm :drawer
mm :stations
mm :tv
mm :header
"TV Channels"
请注意,我使用的是RVM,并且没有做任何特殊的事情来让json工作,必须是自动安装的。
https://stackoverflow.com/questions/13897846
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