Shell处理json数据的方法，简单介绍一下，本文基于CentOS 6 64bit。
yum install jq #需要EPEL源
下面我们有一个config.json文件
{
"USERNAME": "admin",
"CLUSTERMAP_HOSTS": {
"staging":{
"pc": "10.191.130.70",
"app": "10.191.76.250",
"wx": "172.28.172.171"
},
"production":{
"mjq_pc":"172.28.139.30",
"mjq_app":"172.28.148.150",
"mjq_weixin":"172.28.149.84",
"mjq_qq":"172.28.149.77",
"lf_pc":"172.20.145.51",
"lf_app":"172.20.145.40",
"lf_weixin":"172.20.145.86",
"lf_qq":"172.20.112.150",
"jos":"172.20.145.50",
"lf_coupon":"172.20.112.44",
"mjq_coupon":"172.28.139.48"
},
"ab":{
"mjq_pc":"172.28.175.36",
"lf_app":"172.20.121.107"
}
},
"CLUSTERMAP_BINARY_PATH": "/export/App/jd_search/clustermap/bin"
}
获得分片
$ cat config.json | jq '.CLUSTERMAP_HOSTS.production'
[
{
"lf_app": "172.20.121.107",
"mjq_pc": "172.28.175.36"
},
{
"mjq_coupon": "172.28.139.48",
"lf_coupon": "172.20.112.44",
"jos": "172.20.145.50",
"mjq_pc": "172.28.139.30",
"mjq_app": "172.28.148.150",
"mjq_weixin": "172.28.149.84",
"mjq_qq": "172.28.149.77",
"lf_pc": "172.20.145.51",
"lf_app": "172.20.145.40",
"lf_weixin": "172.20.145.86",
"lf_qq": "172.20.112.150"
},
{
"wx": "172.28.172.171",
"app": "10.191.76.250",
"pc": "10.191.130.70"
}
]
获得Key列表
$ cat config.json | jq '.CLUSTERMAP_HOSTS.production | keys' [ "jos", "lf_app", "lf_coupon", "lf_pc", "lf_qq", "lf_weixin", "mjq_app", "mjq_coupon", "mjq_pc", "mjq_qq", "mjq_weixin" ]
获得某个key下面的所有value(列表形式)
$ cat config.json | jq '[ .CLUSTERMAP_HOSTS.production[] ]' [ "172.28.139.48", "172.20.112.44", "172.20.145.50", "172.28.139.30", "172.28.148.150", "172.28.149.84", "172.28.149.77", "172.20.145.51", "172.20.145.40", "172.20.145.86", "172.20.112.150" ]
获得某个key下面的所有value(文本形式)
$ cat config.json | jq ' .CLUSTERMAP_HOSTS.production[] ' "172.28.139.48" "172.20.112.44" "172.20.145.50" "172.28.139.30" "172.28.148.150" "172.28.149.84" "172.28.149.77" "172.20.145.51" "172.20.145.40" "172.20.145.86" "172.20.112.150"
获得某个key(含多个子key)下面的所有(子key)的value(文本形式)
$ jq '.CLUSTERMAP_HOSTS[][]' jd_search_opcenter/opcenter/config.json "172.20.121.107" "172.28.175.36" "172.28.139.48" "172.20.112.44" "172.20.145.50" "172.28.139.30" "172.28.148.150" "172.28.149.84" "172.28.149.77" "172.20.145.51" "172.20.145.40" "172.20.145.86" "172.20.112.150" "172.28.172.171" "10.191.76.250" "10.191.130.70"