我刚刚发布了一个用类SQL语句查询JSON的Golang项目。同样是为了满足查询配置信息和通过用户输入查询JSON的问题。希望对玩Golang的同学有用。

https://github.com/elgs/jsonql

jsonql

SQL like JSON query library in Golang.

This library enables query against JSON using SQL like WHERE clause. Currently supported operators are: (precedences from low to high, case insensitive)

OR
AND
= != > < >= <= RLIKE
+ -
* / %
^
( )

Please note I decided not to implement LIKE or NOTE LIKE operations because RLIKE is enough to handle the cases LIKE and NOT LIKE handle.

Install

go get -u github.com/elgs/jsonql

Example

package main

import (
    "fmt"
    "github.com/elgs/jsonql"
)

var jsonString = `
[
  {
    "name": "elgs",
    "gender": "m",
    "age": 35,
    "skills": [
      "Golang",
      "Java",
      "C"
    ]
  },
  {
    "name": "enny",
    "gender": "f",
    "age": 36,
    "skills": [
      "IC",
      "Electric design",
      "Verification"
    ]
  },
  {
    "name": "sam",
    "gender": "m",
    "age": 1,
    "skills": [
      "Eating",
      "Sleeping",
      "Crawling"
    ]
  }
]
`

func main() {
    parser, err := jsonql.NewStringQuery(jsonString)
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println(parser.Query("name='elgs'"))
    //[map[skills:[Golang Java C] name:elgs gender:m age:35]] <nil>

    fmt.Println(parser.Query("name='elgs' and gender='f'"))
    //[] <nil>

    fmt.Println(parser.Query("age<10 or (name='enny' and gender='f')"))
    //[map[gender:f age:36 skills:[IC Electric design Verification] name:enny] map[age:1 skills:[Eating Sleeping Crawling] name:sam gender:m]] <nil>

    fmt.Println(parser.Query("age<10"))
    //[map[name:sam gender:m age:1 skills:[Eating Sleeping Crawling]]] <nil>

    fmt.Println(parser.Query("1=0"))
    //[] <nil>

    fmt.Println(parser.Query("age=(2*3)^2"))
    //[map[skills:[IC Electric design Verification] name:enny gender:f age:36]] <nil>

    fmt.Println(parser.Query("name RLIKE 'e.*'"))
    //[map[age:35 skills:[Golang Java C] name:elgs gender:m] map[skills:[IC Electric design Verification] name:enny gender:f age:36]] <nil>
}