使用 Java 或 Python 根据特定条件从复杂的 JSON 中提取值

Question

我对 JSON 完全陌生。我有一个包含以下格式的 JSON 文件：

{"A":
     {"B":[
         {"C":{"text":"Command X","meaning":"Read ","http":"some link","Reference":"Reference name"}},
         {"C":{"text":"Command Y","meaning":"Write","http":"some link"}},
         {"C":{"text":"Command Z","meaning":"Read","http":"some link"}}
                      ],
         "context":{"context-id":"6429","section-id":"123","sentence-id":"456","title":"Something","chapter-id":"6","section-title":"Something","sentence-num-in-chapter":"30","section-id":"77","sentence-num-in-section":"1","num-of-sentences":"12","para-id":"0000","subsection-title":"something"},
         "link-id":"123","Command":"XYZ","Sectionlink":"link","command-number":"20.5.1","content-ref":"Something"}
     }
{"A":
....
}

我需要提取以下内容：

Command":XYZ  command-number :20.5.1    Command X  meaning": Read   Command Z  meaning": Read

这意味着：对于每个A，如果命令的含义是"Read"，则提取命令然后提取通用命令"XYZ"和命令编号。

Answer 1

还有 Java 库 FasterXml，它具有用于读写的对象 Json - 如 ObjectMapper。在有条件地提取对象方面 - 条件部分由您承担。

Answer 2

您可以导入json库并通过python使用json.loads()函数:

import json
s = '{"A":{"B":[{"C":{"text":"Command X","meaning":"Read","http":"some link","Reference":"Reference name"}},{"C":{"text":"Command Y","meaning":"Write","http":"some link"}},{"C":{"text":"Command Z","meaning":"Read","http":"some link"}}],"context":{"context-id":"6429","section-id":"123","sentence-id":"456","title":"Something","chapter-id":"6","section-title":"Something","sentence-num-in-chapter":"30","section-id":"77","sentence-num-in-section":"1","num-of-sentences":"12","para-id":"0000","subsection-title":"something"},"link-id":"123","Command":"XYZ","Sectionlink":"link","command-number":"20.5.1","content-ref":"Something"}}'

ds = json.loads(s)

for dict in ds:
      if dict == 'A':
            A = ds[dict]
            for dict in A:
                  for B in A[dict]:
                        try:
                              if B['C']['meaning']=='Read':
                                    print("text : ",B['C']['text'])
                                    print("Command : ",A['Command'])
                                    print("command-number : ",A['command-number'])
                        except:
                              exit

P.S。 : 注意删除的 meaning 键的 Read 值后的空白字符。

使用 Java 或 Python 根据特定条件从复杂的 JSON 中提取值

Extract values from complicated JSON based on a specific condition using Java or Python

python

java

json

extract

conditional-statements