Hyperledger fabric 学习笔记： go语言 与 JSON

1、JSON 介绍
JSON(JavaScript Object Notation, JS 对象标记) 是一种轻量级的数据交换格式。具体介绍可参考https://zh.wikipedia.org/wiki/JSON
2、JSON 与 Go
Go语言自带的JSON转换库为 encoding/json。
http://golang.org/doc/articles/json_and_go.html，这是官方的一篇博客，介绍的挺详细，不过是英文版的。
3、用处

//引用 hyperledger fabric-ca 的go语言代码type RegistrationRequest struct {    // Name is the unique name of the identity    Name string `json:"id" help:"Unique name of the identity"`    // Type of identity being registered (e.g. "peer, app, user")    Type string `json:"type" help:"Type of identity being registered (e.g. 'peer, app, user')"`    // Secret is an optional password.  If not specified,    // a random secret is generated.  In both cases, the secret    // is returned in the RegistrationResponse.    Secret string `json:"secret,omitempty" help:"The enrollment secret for the identity being registered"`    // MaxEnrollments is the maximum number of times the secret can    // be reused to enroll.    MaxEnrollments int `json:"max_enrollments,omitempty" help:"The maximum number of times the secret can be reused to enroll."`    // is returned in the response.    // The identity's affiliation.    // For example, an affiliation of "org1.department1" associates the identity with "department1" in "org1".    Affiliation string `json:"affiliation" help:"The identity's affiliation"`    // Attr is used to support a single attribute provided through the fabric-ca-client CLI    Attr string `help:"Attributes associated with this identity (e.g. hf.Revoker=true)"`    // Attributes associated with this identity    Attributes []Attribute `json:"attrs,omitempty"`}

结构体成员变量 ‘xxxx’ 里面的 json字符串是Go语言的structTag。
structTag：如果希望手动配置结构体的成员和JSON字段的对应关系，可以在定义结构体的时候给成员打标签：
使用omitempty熟悉，如果该字段为nil或0值（数字0,字符串”“,空数组[]等），则打包的JSON结果不会有这个字段。
样例：点击打开链接
4、其他用法
可参考博客：http://blog.csdn.net/tiaotiaoyly/article/details/38942311