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"
参考文档：
jq : linux下json的命令行工具
jq parsing get value