3.Golang的包导入

1.golang的源码文件可以随意命名，但是属于同一个包的源文件必须声明 package base

2.golang的包引入规则

import (
	"fmt"   #系统包直接写名字

	"github.com/user/stringutil"  #其余包 写 src 下的绝对路径
)


go help importpath

A few common code hosting sites have special syntax:

Bitbucket (Git, Mercurial)

import "bitbucket.org/user/project"
import "bitbucket.org/user/project/sub/directory"

GitHub (Git)

import "github.com/user/project"
import "github.com/user/project/sub/directory"

Launchpad (Bazaar)

import "launchpad.net/project"
import "launchpad.net/project/series"
import "launchpad.net/project/series/sub/directory"

import "launchpad.net/~user/project/branch"
import "launchpad.net/~user/project/branch/sub/directory"

IBM DevOps Services (Git)

import "hub.jazz.net/git/user/project"
import "hub.jazz.net/git/user/project/sub/directory"

#### 导入的包还可以有以下几种方式

import (

 . "launchpad.net/project/series/sub/directory"   不用包名直接引用func

 lele "launchpad.net/project/series/sub/directory"   使用自建别名

_ "launchpad.net/project/series/sub/directory"     不再使用该包 相当于注释

)

3.包初始化函数

func init（）

　执行init 前会将所有变量初始化