编解码JSON数据

package main

import (
_ "fmt"
"encoding/json"
"log"
)

type Book struct {
Title string
Authors []string
Publisher string
IsPublished bool
Price float32
}

func main() {
gobook := Book {
"Go语言编程",
[]string{"XuShiwei", "HughLv", "Pandaman", "GuaguaSong", "HanTuo",
"BertYuan", "XuDaoli"},
"ituring.com.cn",
true,
9.99,
}

b, _ := json.Marshal(gobook)
log.Printf("b = %#v\n", b)

// comparedByteArray就是b进行JSON格式化后的[]byte
comparedByteArray := []byte(`{"Title":"Go语言编程","Authors":["XuShiwei","HughLv","Pandaman","GuaguaSong","HanTuo","BertYuan","XuDaoli"],"Publisher":"ituring.com.cn","IsPublished":true,"Price":9.99}`)

if comparedByteArray != nil {
log.Printf("comparedByteArray = %#v\n", comparedByteArray)
}

for i, _ := range b {
if b[i] != comparedByteArray[i] {
log.Println("b[", i, "] = ", b[i], ", ",
"comparedByteArray[", i, "] = ", comparedByteArray[i])
}
}

// 如果JSON中的字段在Go目标类型中不存在，json.UnMarshal()函数在解码过程中会丢弃该字段。
// 由于Sales字段并没有在Book类型中定义，所以会被忽略，只有Title这个字段的值会被填充到book.Title中。
b = []byte(`{"Title":"Go编程语言","Sales":1000000}`)
var book Book
err := json.Unmarshal(b, &book)
if err == nil {
log.Println(book)
}

}

输出结果

2015/12/06 12:52:36 b = []byte{0x7b, 0x22, 0x54, 0x69, 0x74, 0x6c, 0x65, 0x22, 0x3a, 0x22, 0x47, 0x6f, 0xe8, 0xaf, 0xad, 0xe8, 0xa8, 0x80, 0xe7, 0xbc, 0x96, 0xe7, 0xa8, 0x8b, 0x22, 0x2c, 0x22, 0x41, 0x75, 0x74, 0x68, 0x6f, 0x72, 0x73, 0x22, 0x3a, 0x5b, 0x22, 0x58, 0x75, 0x53, 0x68, 0x69, 0x77, 0x65, 0x69, 0x22, 0x2c, 0x22, 0x48, 0x75, 0x67, 0x68, 0x4c, 0x76, 0x22, 0x2c, 0x22, 0x50, 0x61, 0x6e, 0x64, 0x61, 0x6d, 0x61, 0x6e, 0x22, 0x2c, 0x22, 0x47, 0x75, 0x61, 0x67, 0x75, 0x61, 0x53, 0x6f, 0x6e, 0x67, 0x22, 0x2c, 0x22, 0x48, 0x61, 0x6e, 0x54, 0x75, 0x6f, 0x22, 0x2c, 0x22, 0x42, 0x65, 0x72, 0x74, 0x59, 0x75, 0x61, 0x6e, 0x22, 0x2c, 0x22, 0x58, 0x75, 0x44, 0x61, 0x6f, 0x6c, 0x69, 0x22, 0x5d, 0x2c, 0x22, 0x50, 0x75, 0x62, 0x6c, 0x69, 0x73, 0x68, 0x65, 0x72, 0x22, 0x3a, 0x22, 0x69, 0x74, 0x75, 0x72, 0x69, 0x6e, 0x67, 0x2e, 0x63, 0x6f, 0x6d, 0x2e, 0x63, 0x6e, 0x22, 0x2c, 0x22, 0x49, 0x73, 0x50, 0x75, 0x62, 0x6c, 0x69, 0x73, 0x68, 0x65, 0x64, 0x22, 0x3a, 0x74, 0x72, 0x75, 0x65, 0x2c, 0x22, 0x50, 0x72, 0x69, 0x63, 0x65, 0x22, 0x3a, 0x39, 0x2e, 0x39, 0x39, 0x7d}
2015/12/06 12:52:36 comparedByteArray = []byte{0x7b, 0x22, 0x54, 0x69, 0x74, 0x6c, 0x65, 0x22, 0x3a, 0x22, 0x47, 0x6f, 0xe8, 0xaf, 0xad, 0xe8, 0xa8, 0x80, 0xe7, 0xbc, 0x96, 0xe7, 0xa8, 0x8b, 0x22, 0x2c, 0x22, 0x41, 0x75, 0x74, 0x68, 0x6f, 0x72, 0x73, 0x22, 0x3a, 0x5b, 0x22, 0x58, 0x75, 0x53, 0x68, 0x69, 0x77, 0x65, 0x69, 0x22, 0x2c, 0x22, 0x48, 0x75, 0x67, 0x68, 0x4c, 0x76, 0x22, 0x2c, 0x22, 0x50, 0x61, 0x6e, 0x64, 0x61, 0x6d, 0x61, 0x6e, 0x22, 0x2c, 0x22, 0x47, 0x75, 0x61, 0x67, 0x75, 0x61, 0x53, 0x6f, 0x6e, 0x67, 0x22, 0x2c, 0x22, 0x48, 0x61, 0x6e, 0x54, 0x75, 0x6f, 0x22, 0x2c, 0x22, 0x42, 0x65, 0x72, 0x74, 0x59, 0x75, 0x61, 0x6e, 0x22, 0x2c, 0x22, 0x58, 0x75, 0x44, 0x61, 0x6f, 0x6c, 0x69, 0x22, 0x5d, 0x2c, 0x22, 0x50, 0x75, 0x62, 0x6c, 0x69, 0x73, 0x68, 0x65, 0x72, 0x22, 0x3a, 0x22, 0x69, 0x74, 0x75, 0x72, 0x69, 0x6e, 0x67, 0x2e, 0x63, 0x6f, 0x6d, 0x2e, 0x63, 0x6e, 0x22, 0x2c, 0x22, 0x49, 0x73, 0x50, 0x75, 0x62, 0x6c, 0x69, 0x73, 0x68, 0x65, 0x64, 0x22, 0x3a, 0x74, 0x72, 0x75, 0x65, 0x2c, 0x22, 0x50, 0x72, 0x69, 0x63, 0x65, 0x22, 0x3a, 0x39, 0x2e, 0x39, 0x39, 0x7d}
2015/12/06 12:52:36 {Go编程语言 [] false 0}