Linux 如何使用shell脚本将json对象添加到json文件中
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how to add json object to json file using shell script
提问by user2353439
json file as follows:
json文件如下：
{"name" :"sam",
"age":23,
"designation":"doctor"}
now i want to add another json object {"location":"canada"} at the end of the file using bash script i have tried echo "{"location":"canada"}">>sample.json
现在我想使用 bash 脚本在文件末尾添加另一个 json 对象 {"location":"canada"} 我试过 echo "{"location":"canada"}">>sample.json
but it results
但结果
{"name" :"sam",
"age":23,
"designation":"doctor"} {location:canada}
but i want it to be like this
但我希望它是这样的
{"name" :"sam",
"age":23,
"designation":"doctor",
"location":"canada"}
please suggest me
请给我建议
采纳答案by perreal
sed -i '$s/}/,\n"location":"canada"}/' sample.json
Result:
结果：
{"name" :"sam",
"age":23,
"designation":"doctor",
"location":"canada"}
回答by jfs
To merge two json objects, you could use jqcommand-line utility:
要合并两个 json 对象，您可以使用jq命令行实用程序：
$ jq -s add sample.json another.json
Output:
输出：
{
"name": "sam",
"age": 23,
"designation": "doctor",
"location": "canada"
}
To update a single attribute:
要更新单个属性：
$ jq '.location="canada"' sample.json
It produces the same output.
它产生相同的输出。
To prepend "doctor"to the location:
要添加"doctor"到位置：
$ jq '.location = "doctor" + .location' input.json
Output:
输出：
{
"name": "sam",
"age": 23,
"designation": "doctor",
"location": "doctorcanada"
}
