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
