Shell Jq命令详解

Json文件

对象是属性、值的集合。一个对象开始与”{” ,结束于”}”。每一个属性名和值间用”:”分隔。每个属性间用”，”分隔。
值可以是字符串，数字，逻辑值，数组，对象，null。数字：整数或浮点数字符串：在双引号中逻辑符：true和false
数组：在方括号中对象：在花括号中 null：代表空

示范

jq “.” 解析全部内容
jq “.name,.id” 解析key为name和id的value ,为分隔符，基于当前

一般使用

{"name":"ym68","id":68,"url":"https://www.ym68.cc"}

解析Json格式文件内容

[[email protected] ~]# jq . a
{
  "name": "ym68",
  "id": 68,
  "url": "https://www.ym68.cc"
}

解析指定key内容

[[email protected] ~]# jq .name a
"ym68"
[[email protected] ~]# jq .name,.id a
"ym68"
68

常规

jq “.name_list|.[].name,.[].id” 解析指定key值，当有[]时需|进行分割

{"name_list":[{"name":"zhangsan","id":12},{"name":"lisi","id":13}],"id":68,"url":"https://www.ym68.cc"}

[[email protected] ~]# jq . a
{
  "name_list": [
    {
      "name": "zhangsan",
      "id": 12
    },
    {
      "name": "lisi",
      "id": 13
    }
  ],
  "id": 68,
  "url": "https://www.ym68.cc"
}
[[email protected] ~]# jq ".name_list|.[].name,.[].id" a
"zhangsan"
"lisi"
12
13
[[email protected] ~]# jq ".name_list|.[]|.name,.id" a
"zhangsan"
12
"lisi"
13

重新指定输出内容

jq “.name_list|.[]|{mingcheng:.name,yonghuid:.id}” 将[]中的内容进行重输出

[[email protected] ~]# jq ".name_list|.[]|{mingcheng:.name,yonghuid:.id}" a
{
  "mingcheng": "zhangsan",
  "yonghuid": 12
}
{
  "mingcheng": "lisi",
  "yonghuid": 13
}
[[email protected] ~]# jq ".name_list|.[]|{mingcheng:.name,yonghuid:.id,xinzeng:\"codedd\",xinzen2:12}" a
{
  "mingcheng": "zhangsan",
  "yonghuid": 12,
  "xinzeng": "codedd",
  "xinzen2": 12
}
{
  "mingcheng": "lisi",
  "yonghuid": 13,
  "xinzeng": "codedd",
  "xinzen2": 12
}

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