github.com/jeffcail/leveldb

leveldb

LevelDB is a key-value store embedded database management system programming library developed by Google

Introduce

Go operates leveldb, including Put, Get, Has, Delete, and SelectAll.

Install

Example

InitClient

db, err := leveldb.CreateLevelDB("./leveldb_data")

Put

k - v

db.Put("test", "test")

struct

type Demo struct {
    Phone     string
    ChannelId int
    Reason    string
}
d := new(Demo)

d.Phone = "18745682512"
d.ChannelId = 1
d.Reason = "黑名单用户"

db.Put("key", &d)

map

a := make(map[string]interface{})
a["id"] = 1
a["name"] = "map"

db.Put("m", a)

array

array := [...]int{1, 2, 3}
db.Put("array", array)

slice

numbers := []int{0,1,2,3,4,5,6,7,8}
db.Put("n", numbers)

Get

res, err := db.Get("test")
if err != nil {
    panic(err)
}
fmt.Printf("test: %s\n", res)

res2, err := db.Get("46181632293601280")
if err != nil {
    panic(err)
}

type Demo struct {
    Phone     string
    ChannelId int
    Reason    string
}
d := new(Demo)

json.Unmarshal([]byte(res2), &d)

fmt.Printf("Phone: %s\n", d.Phone)
fmt.Printf("ChannelId: %d\n", d.ChannelId)
fmt.Printf("Reason: %s\n", d.Reason)

Has

if ok, _ := db.Has("test"); !ok {
	fmt.Printf("key 为%s\n不存在", "test")
}

Delete

err = db.Delete("test")

SelectAll

iter := db.SelectAll()
for iter.Next() {
    k := iter.Key()
    v := iter.Value()
    fmt.Printf("k: %s\n", k)
    fmt.Printf("v: %s\n", v)
}
iter.Release()
err = iter.Error()
if err != nil {
    panic(err)
}