在Shell脚本中获取逗号分隔的值

Question

我有一个包含多行的文件，例如以下字符串。 我需要提取id和obj的值。

{"Class":"ZONE","id":"DEV100.ZN301","name":"3109 E BTM","zgroup":"EAST FLOOR 3","prog":"","members":[{"obj":"DEV300.WC3"},{"obj":"DEV300.WC4"},{"obj":"DEV300.WC7"},{"obj":"DEV300.WC10"}]}

我正在使用以下命令来获取输出：

[user@server ~]$ cat file.txt | grep "\"Class\":\"ZONE\"" | while IFS="," read -r a b c d e f ; do echo "$b$f";done | grep ZN301

输出：

"id":"DEV100.ZN301""members":[{"obj":"DEV300.WC3"},{"obj":"DEV300.WC4"},{"obj":"DEV300.WC7"},{"obj":"DEV300.WC10"}]}

我的目标是获得以下输出：

DEV100.ZN301 : DEV300.WC3 , DEV300.WC4 , DEV300.WC7 , DEV300.WC10

请帮帮我。 谢谢！

Answer 1

jq -r 'select(.Class == "ZONE") | (.id + " : " + ([.members[] | .obj] | join(" , ")))'

...或者依靠Python解释器：

parse_json() {
  python -c '
import sys, json
for line in sys.stdin:
  line = line.strip()    # ignore trailing newlines
  if not line: continue  # skip blank lines
  doc = json.loads(line)
  if doc.get("Class") != "ZONE":
    continue
  line_id = doc.get("id")
  objs = [m.get("obj") for m in doc.get("members", [])]
  sys.stdout.write("%s : %s\n" % (line_id, " , ".join(objs)))
'
}

parse_json