前言：
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在shell命令和脚本对复杂数据类型支持不是特别友好，介绍一个shell脚本中处理json对象的工具jq
样例json字符串如下：
test_info='{"name":"zhangsan","age":18,"work_exp":[{"name":"teacher","months":14},{"name":"ops","months":20},{"name":"dev","months":4}]'
基本解析
[root@VM_16_6_centos ~]# echo $test_info |jq .{ "name": "zhangsan", "age": 18, "work_exp": [ { "name": "teacher", "months": 14 }, { "name": "ops", "months": 20 }, { "name": "dev", "months": 4 } ]}基本过滤[root@VM_16_6_centos ~]# echo $test_info |jq .name"zhangsan"[root@VM_16_6_centos ~]# echo $test_info |jq '.work_exp'[ { "name": "teacher", "months": 14 }, { "name": "ops", "months": 20 }, { "name": "dev", "months": 4 }][root@VM_16_6_centos ~]# echo $test_info |jq '.work_exp[2]'{ "name": "dev", "months": 4}[root@VM_16_6_centos ~]# echo $test_info |jq '.work_exp[0:2]'[ { "name": "teacher", "months": 14 }, { "name": "ops", "months": 20 }][root@VM_16_6_centos ~]# echo $test_info |jq '.work_exp[-1]'{ "name": "dev", "months": 4}[root@VM_16_6_centos ~]# echo $test_info |jq '.work_exp[-1].name'"dev"[root@VM_16_6_centos ~]# echo $test_info |jq '.work_exp | .[1]'{ "name": "ops", "months": 20}构造对象[root@VM_16_6_centos ~]# echo $test_info |jq '"teacher" as $first_job | {"first_job":$first_job,"second_job": .work_exp[1].name }'{ "first_job": "teacher", "second_job": "ops"}[root@VM_16_6_centos ~]# echo $test_info |jq '"teacher" as $first_job | {"jobs": (.work_exp + .work_exp) }'{ "jobs": [ { "name": "teacher", "months": 14 }, { "name": "ops", "months": 20 }, { "name": "dev", "months": 4 }, { "name": "teacher", "months": 14 }, { "name": "ops", "months": 20 }, { "name": "dev", "months": 4 } ]}[root@VM_16_6_centos ~]# echo $test_info |jq '"teacher" as $first_job | {"jobs": (.work_exp - .work_exp) }'{ "jobs": []}内置运算[root@VM_16_6_centos ~]# echo $test_info |jq '.work_exp |length '3[root@VM_16_6_centos ~]# echo $test_info |jq '.work_exp[0] | has("name") 'true[root@VM_16_6_centos ~]# echo $test_info |jq '.work_exp[0] | has("name1") 'false[root@VM_16_6_centos ~]# echo $test_info |jq '.work_exp[0] | keys '[ "months", "name"][root@VM_16_6_centos ~]# echo $test_info |jq '.work_exp[0].name | startswith("te") 'true[root@VM_16_6_centos ~]# echo $test_info |jq '.work_exp[0].name | endswith("er") 'true[root@VM_16_6_centos ~]# echo $test_info |jq '.work_exp | map(.months + 1) '[ 15, 21, 5][root@VM_16_6_centos ~]# echo $test_info |jq '{"a":1,"b":2,"c":3} |map(.+1) '[ 2, 3, 4][root@VM_16_6_centos ~]# echo $test_info |jq '{"a":1,"b":2,"c":3} |map_values(.+1) '{ "a": 2, "b": 3, "c": 4} 版权声明：
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标签： #jq根据name获取对象
