go使用mongo

文档链接:https://godoc.org/labix.org/v2/mgo
mongo包下载:go get github.com/go-mgo/mgo

import (
 "fmt"
 "gopkg.in/mgo.v2"
 _ "gopkg.in/mgo.v2/bson"
 "os"
)
var Session *mgo.Session
var Databases *mgo.Database
var MgoError error
const (
 MONGO_HOST = ""
 MONGO_PORT = ""
 MONGO_DB = ""
 MONGO_USER = ""
 MONGO_PWD = ""
)
func init() {
 // 创建链接
 Session, MgoError = mgo.Dial(fmt.Sprintf("%s:%s", MONGO_HOST, MONGO_PORT))
 if MgoError != nil {
 fmt.Println("链接失败!")
 os.Exit(1)
 }
 // 选择DB
 Databases = Session.DB(MONGO_DB)
 // 登陆
 MgoError = Databases.Login(MONGO_USER, MONGO_PWD)
 if MgoError != nil {
 fmt.Println("登陆验证失败!")
 os.Exit(1)
 }
 // defer Session.Close()
}
func Demos() {
 // 选择一个要操作的Collection
 c := Databases.C("demo")
 // count
 fmt.Println(c.Count())
 // insert
 c.Insert(map[string]string{"name": "马超"})
 // update
 c.Update(map[string]string{"name": "马超"}, map[string]string{"name": "黄忠"})
 // remove
 c.Remove(map[string]string{"name": "马超"})
 // find - count
 num, MgoError := c.Find(map[string]string{"name": "黄忠"}).Count()
 if MgoError != nil {
 fmt.Println(MgoError.Error())
 } else {
 fmt.Println(num)
 }
 // find - one
 var one map[string]interface{}
 MgoError = c.Find(map[string]string{"name": "黄忠"}).One(&one)
 if MgoError != nil {
 fmt.Println(MgoError.Error())
 } else {
 fmt.Println(one)
 }
 // find - all
 var all []map[string]interface{}
 MgoError = c.Find(map[string]string{"name": "黄忠"}).All(&all)
 if MgoError != nil {
 fmt.Println(MgoError.Error())
 } else {
 fmt.Println(all)
 }
}