# 安装命令
yum install jq
[root@local]# yum install jq
Loaded plugins: fastestmirror
Determining fastest mirrors
base | 3.6 kB 00:00:00
epel | 4.7 kB 00:00:00
extras | 2.9 kB 00:00:00
mysql-connectors-community | 2.6 kB 00:00:00
mysql-tools-community | 2.6 kB 00:00:00
mysql57-community | 2.6 kB 00:00:00
updates | 2.9 kB 00:00:00
(1/8): epel/x86_64/group_gz | 97 kB 00:00:00
(2/8): epel/x86_64/updateinfo | 1.0 MB 00:00:00
(3/8): extras/7/x86_64/primary_db | 249 kB 00:00:00
(4/8): epel/x86_64/primary_db | 7.0 MB 00:00:00
(5/8): updates/7/x86_64/primary_db | 17 MB 00:00:00
(6/8): mysql-tools-community/x86_64/primary_db | 89 kB 00:00:00
(7/8): mysql-connectors-community/x86_64/primary_db | 93 kB 00:00:00
(8/8): mysql57-community/x86_64/primary_db | 325 kB 00:00:01
Resolving Dependencies
--> Running transaction check
---> Package jq.x86_64 0:1.6-2.el7 will be installed
--> Processing Dependency: libonig.so.5()(64bit) for package: jq-1.6-2.el7.x86_64
--> Running transaction check
---> Package oniguruma.x86_64 0:6.8.2-2.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
===========================================================================================================
Package Arch Version Repository Size
===========================================================================================================
Installing:
jq x86_64 1.6-2.el7 epel 167 k
Installing for dependencies:
oniguruma x86_64 6.8.2-2.el7 epel 181 k
Transaction Summary
===========================================================================================================
Install 1 Package (+1 Dependent package)
Total download size: 348 k
Installed size: 1.0 M
Is this ok [y/d/N]: y
Downloading packages:
(1/2): jq-1.6-2.el7.x86_64.rpm | 167 kB 00:00:00
(2/2): oniguruma-6.8.2-2.el7.x86_64.rpm | 181 kB 00:00:00
-----------------------------------------------------------------------------------------------------------
Total 2.1 MB/s | 348 kB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : oniguruma-6.8.2-2.el7.x86_64 1/2
Installing : jq-1.6-2.el7.x86_64 2/2
Verifying : oniguruma-6.8.2-2.el7.x86_64 1/2
Verifying : jq-1.6-2.el7.x86_64 2/2
Installed:
jq.x86_64 0:1.6-2.el7
Dependency Installed:
oniguruma.x86_64 0:6.8.2-2.el7
Complete!
[root@local]#
[root@local]# jq
jq - commandline JSON processor [version 1.6]
Usage: jq [options] <jq filter> [file...]
jq [options] --args <jq filter> [strings...]
jq [options] --jsonargs <jq filter> [JSON_TEXTS...]
jq is a tool for processing JSON inputs, applying the given filter to
its JSON text inputs and producing the filter's results as JSON on
standard output.
The simplest filter is ., which copies jq's input to its output
unmodified (except for formatting, but note that IEEE754 is used
for number representation internally, with all that that implies).
For more advanced filters see the jq(1) manpage ("man jq")
and/or https://stedolan.github.io/jq
Example:
$ echo '{"foo": 0}' | jq .
{
"foo": 0
}
For a listing of options, use jq --help.
[root@local]#
# 使用例子
[root@local] vim test.sh
jsonstr='{"name":"zhangsan","age":25,"arr":["aaa","bbb","ccc"],"addr":{"province":"js","city":"cz"}}'
echo ${jsonstr} | jq -r '.name'
echo ${jsonstr} | jq -r '.arr'
echo ${jsonstr} | jq -r '.arr[0]'
echo ${jsonstr} | jq -r '.arr[2]'
echo ${jsonstr} | jq -r '.addr.province'
echo ${jsonstr} | jq -r '.addr.city'
jsonstr='[{"id":"001","value":"1"},{"id":"002","value":"2"},{"id":"003","value":"3"},{"id":"004","value":"4"},{"id":"005","value":"5"},{"id":"006","value":"6"}]'
k=0
id=`echo ${jsonstr} | jq -r ".["${k}"].id"`
value=`echo ${jsonstr} | jq -r ".["${k}"].value"`
echo "${id} ${value}"
k=1
id=`echo ${jsonstr} | jq -r ".["${k}"].id"`
value=`echo ${jsonstr} | jq -r ".["${k}"].value"`
echo "${id} ${value}"