如何使用shell脚本将json对象添加到json文件

Question

json文件如下：

{"name" :"sam",
"age":23,
"designation":"doctor"}

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“}”＆gt;＆gt; sample.json

但结果

{"name" :"sam",
"age":23,
"designation":"doctor"} {location:canada}

但我希望它像这样

{"name" :"sam",
"age":23,
"designation":"doctor", 
"location":"canada"}

请建议我

Answer 1

要合并两个json对象，可以使用jq command-line utility：

$ jq -s add sample.json another.json

输出：

{
  "name": "sam",
  "age": 23,
  "designation": "doctor",
  "location": "canada"
}

更新单个属性：

$ jq '.location="canada"' sample.json

它产生相同的输出。

将"doctor"添加到该位置：

$ jq '.location = "doctor" + .location' input.json

输出：

{
  "name": "sam",
  "age": 23,
  "designation": "doctor",
  "location": "doctorcanada"
}

Answer 2

sed -i '$s/}/,\n"location":"canada"}/' sample.json

结果：

{"name" :"sam",
"age":23,
"designation":"doctor",
"location":"canada"}