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自定义json输出
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| package main | |
| import ( | |
| "bytes" | |
| "encoding/json" | |
| "fmt" | |
| "strconv" | |
| "time" | |
| ) | |
| // Person : for test struct | |
| type Person struct { | |
| Birthday *JavaTime `json:"birthday"` | |
| } | |
| func main() { | |
| bir := JavaTime(time.Date(1991, time.August, 01, 0, 0, 0, 0, time.UTC)) | |
| p := Person{Birthday: &bir} | |
| // 从类型转换为 json 字符串: | |
| j, _ := json.Marshal(p) | |
| fmt.Printf("json := %v\n", string(j)) | |
| // 从 json 字符串，转换为 类型: | |
| json.Unmarshal(j, &p) | |
| bir = *p.Birthday | |
| golangTime := time.Time(bir) | |
| fmt.Printf("bir year = %v\n", golangTime.Year()) | |
| } | |
| // JavaTime : time.Time | |
| type JavaTime time.Time | |
| // UnmarshalJSON : UnmarshalJSON 自定义从json->转换器 | |
| func (j *JavaTime) UnmarshalJSON(data []byte) error { | |
| millis, err := strconv.ParseInt(string(data), 10, 64) | |
| if err != nil { | |
| return err | |
| } | |
| *j = JavaTime(time.Unix(0, millis*int64(time.Millisecond))) | |
| return nil | |
| } | |
| // MarshalJSON : 自定义对象转换到 json | |
| func (j *JavaTime) MarshalJSON() (data []byte, err error) { | |
| var buf bytes.Buffer | |
| origin := time.Time(*j) | |
| buf.WriteString(strconv.FormatInt(origin.UnixNano()/int64(time.Millisecond), 10)) | |
| return buf.Bytes(), nil | |
| } |
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