深入了解Golang包的获取方法

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1.获取远程包

go 语言有一个获取远程包的工具就是 go get,目前 go get 支持多数开源社区 (例如:github、googlecode、bitbucket、Launchpad)

例如:

go get github.com/astaxie/beedb

在pkg目录下tree /f可查看到安装的包如下所示:

2.应用

如下代码所示,可以应用远程下载的go第三方库文件,连接sqllite。

链接地址

package main

import (
	"fmt"
	"github.com/astaxie/beedb"
	_ "github.com/mattn/go-sqlite3"
	"time"
	"database/sql"
)

/*
CREATE TABLE `userinfo` (
	`uid` INTEGER PRIMARY KEY AUTOINCREMENT,
	`username` VARCHAR(64) NULL,
	`departname` VARCHAR(64) NULL,
	`created` DATE NULL
);
CREATE TABLE `userdeatail` (
	`uid` INT(10) NULL,
	`intro` TEXT NULL,
	`profile` TEXT NULL,
	PRIMARY KEY (`uid`)
);
*/

var orm beedb.Model

type Userinfo struct {
	Uid        int `beedb:"PK"`
	Username   string
	Departname string
	Created    string
}

func main() {
	db, err := sql.Open("sqlite3", "./asta.db")
	if err != nil {
		panic(err)
	}
	orm = beedb.New(db)
	//insert()
	//insertsql()
	// a := selectone()
	// fmt.Println(a)

	// b := selectall()
	// fmt.Println(b)

	// update()

	// updatesql()

	// findmap()

	// groupby()

	// jointable()

	// delete()

	//deletesql()

	//deleteall()
}

func insert() {
	//save data
	var saveone Userinfo
	saveone.Username = "Test Add User"
	saveone.Departname = "Test Add Departname"
	saveone.Created = time.Now().Format("2006-01-02 15:04:05")
	orm.Save(&saveone)
	fmt.Println(saveone)
}

func insertsql() {
	// add one
	add := make(map[string]interface{})
	add["username"] = "astaxie"
	add["departname"] = "cloud develop"
	add["created"] = "2012-12-02"
	orm.SetTable("userinfo").Insert(add)
}

func selectone() Userinfo {
	//get one info
	var one Userinfo
	orm.Where("uid=?", 1).Find(&one)
	return one
}

func selectall() []Userinfo {
	//get all data
	var alluser []Userinfo
	orm.Limit(10).Where("uid>?", 1).FindAll(&alluser)
	return alluser
}

func update() {
	// //update data
	var saveone Userinfo
	saveone.Uid = 1
	saveone.Username = "Update Username"
	saveone.Departname = "Update Departname"
	saveone.Created = time.Now().Format("2006-01-02 15:04:05")
	orm.Save(&saveone)
	fmt.Println(saveone)
}

func updatesql() {
	//original SQL update 
	t := make(map[string]interface{})
	t["username"] = "updateastaxie"
	//update one
	orm.SetTable("userinfo").SetPK("uid").Where(2).Update(t)
	//update batch
	orm.SetTable("userinfo").Where("uid>?", 3).Update(t)
}

func findmap() {
	//Original SQL Backinfo resultsSlice []map[string][]byte 
	//default PrimaryKey id
	c, _ := orm.SetTable("userinfo").SetPK("uid").Where(2).Select("uid,username").FindMap()
	fmt.Println(c)
}

func groupby() {
	//Original SQL Group By 
	b, _ := orm.SetTable("userinfo").GroupBy("username").Having("username='updateastaxie'").FindMap()
	fmt.Println(b)
}

func jointable() {
	//Original SQL Join Table
	a, _ := orm.SetTable("userinfo").Join("LEFT", "userdeatail", "userinfo.uid=userdeatail.uid").Where("userinfo.uid=?", 1).Select("userinfo.uid,userinfo.username,userdeatail.profile").FindMap()
	fmt.Println(a)
}

func delete() {
	// // //delete one data
	saveone := selectone()
	orm.Delete(&saveone)
}

func deletesql() {
	//original SQL delete
	orm.SetTable("userinfo").Where("uid>?", 2).DeleteRow()
}

func deleteall() {
	// //delete all data
	alluser := selectall()
	orm.DeleteAll(&alluser)
}

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