1. jq 命令参数

[{"name":"aox.lei","url":"http://www.phpue.com","address":{"city":"北京","country":"中国"},"arrayiiirowser":[{"name":"Google","url":"http://www.google.com"},{"name":"Baidu","url":"http://www.baidu.com"}]},{"name":"aox.lei.blog","url":"http://www.phpue.com","address":{"city":"北京","country":"中国"},"arrayBrowser":[{"name":"百度","url":"http://www.baidu.com"},{"name":"bing","url":"http://iiiiiiiwww.bing.com"}]}]

将数据保存在1.json中

2. 格式化json数据

jq . file_path
. 的意思是所有数据, 不过滤

cat 1.json | jq
# 或者
jq . 1.json

返回数据

[{"name": "aox.lei","url": "http://www.phpue.com","address": {"city": "北京","country": "中国"},"arrayBrowser": [{"name": "Google","url": "http://www.google.com"},{"name": "Baidu","url": "http://www.baidu.com"}]},{"name": "aox.lei.blog","url": "http://www.phpue.com","address": {"city": "北京","country": "中国"},"arrayBrowser": [{"name": "百度","url": "http://www.baidu.com"},{"name": "bing","url": "http://www.bing.com"}]}
]

3. 根据index获取数据

jq '.[0]' 1.json

.[0] 的意思是获取下标是0的数据
返回数据:

{"name": "aox.lei","url": "http://www.phpue.com","address": {"city": "北京","country": "中国"},"arrayBrowser": [{"name": "Google","url": "http://www.google.com"},{"name": "Baidu","url": "http://www.baidu.com"}]
}

1. 截取数据

jq '.[0-2]' 1.json

返回数据

[{"name": "aox.lei","url": "http://www.phpue.com","address": {"city": "北京","country": "中国"},"arrayBrowser": [{"name": "Google","url": "http://www.google.com"},{"name": "Baidu","url": "http://www.baidu.com"}]},{"name": "aox.lei.blog","url": "http://www.phpue.com","address": {"city": "北京","country": "中国"},"arrayBrowser": [{"name": "百度","url": "http://www.baidu.com"},{"name": "bing","url": "http://www.bing.com"}]}
]

4. 管道符的使用

jq '.[0] | {name:.name, url:.url}' 1.json

意思是将.[0]的数据重新格式化, 赋值生成新的一个json, 这样可以过滤掉没用的数据, 方便查看
返回数据

{"name": "aox.lei","url": "http://www.phpue.com"
}

jq '.[] | {name:.name, url:.url}' 1.json

返回数据

{"name": "aox.lei","url": "http://www.phpue.com"
}
{"name": "aox.lei.blog","url": "http://www.phpue.com"
}

5. 获取元素个数

jq '.[] | length' 1.json

返回数据

4
4

6. keys操作

1. 获取keys

jq 'keys' 1.json

返回数据

[0,1
]

2. 判断key是否存在 has(key)

jq 'map(has("name"))' 1.json

返回数据

[true,true
]