我正在尝试将json转换为golang嵌套结构。它只是部分工作。大多数字段都没有正确解析,尽管有些字段可以解析。为什么来自json的所有数据都不会转换为golang结构?我的猜测是我的json格式和golang结构之间有一些错误,但我没有看到它。发布以解决问题。
当我运行程序时,机器的IP地址是未编组的,但测试运行ID不是。这是我的主要方法的输出:
test run id:
machine ip:172.25.148.39
这是我的golang代码:
package main
import (
"encoding/json"
"bytes"
"io/ioutil"
"runtime"
"log"
)
func main() {
var testRunConfig TestRunConfig
testRunConfigJson := ReadFile("testrun-config.json")
err := json.Unmarshal([]byte(testRunConfigJson), &testRunConfig)
if err != nil {
HandleError(err)
}
println("test run id:" + testRunConfig.Id)
println("machine ip:" + testRunConfig.Machines[0].IP)
}
//Logs the error, the function and the line number where it was generated
func HandleError(err error) (bool) {
b := false
if err != nil {
// notice that we're using 1, so it will actually log the where
// the error happened, 0 = this function, we don't want that.
pc, fn, line, _ := runtime.Caller(1)
log.Printf("[error] in %s[%s:%d] %v", runtime.FuncForPC(pc).Name(), fn, line, err)
b = true
panic(err)
}
return b
}
func ReadFile(fileName string) string {
dat, err := ioutil.ReadFile(fileName)
HandleError(err)
return string(dat)
}
//http://json2struct.mervine.net/
type Machine struct {
IP string
Interfaces []Interface
Containers []Container
CmdBuffer bytes.Buffer
}
type InetAddress struct {
Addr string
DelayMS int
}
type Interface struct {
Name string
InetAddresses []InetAddress
}
type Volume struct {
Localhost string
Volume string
}
type NetworkTopology struct {
Host string
Port string
}
type Container struct {
Image string
Mem string
Cpu float64
Disk string
Volume Volume
NodeId int
ServiceType string
InstanceId string
Port string
NetworkTopology []NetworkTopology
Args map[string]string
//"machine" element being a member of a Container is helpful for code flow/logic,
//but is not required as part of the data model (it's duplicate data).
//This is why it's private (not capitalized). Think of it as a "transient" in java.
machine Machine
}
type TestRunConfig struct {
Id string
Machines []Machine
}
这是json被转换:
{
"Id:": "testRunId",
"Machines": [
{
"Ip": "172.25.148.39",
"Interfaces": [
{
"Name": "ems3f0",
"InetAddresses": [
{
"Addr": "10.0.0.x/16",
"DelayMS": 0
}
]
},
{
"Name": "ems3f1",
"InetAddresses": [
{
"Addr": "10.5.0.x/16",
"DelayMS": 5
},
{
"Addr": "10.15.0.x/16",
"DelayMS": 15
},
{
"Addr": "10.25.0.x/16",
"DelayMS": 25
}
]
}
],
"Containers": [
{
"Image": "docker-core:1",
"Mem": "20GB",
"Cpu": 1.0,
"Disk": "20GB",
"Volume": {
"Localhost": "/mnt/md0/${containerId}",
"Volume": "/root/.btcd${containerId}"
},
"NodeId": 0,
"ServiceType": "core",
"InstanceId": "core1",
"Port": "f(nodeid, serviceid, instanceId -> port #)",
"NetworkTopology": [
{
"Host": "ip.address",
"Port": "some.port"
}
],
"Args": {
"database": "${volume}/init-data.csv.tgz",
"listenPort": "1234",
"sendPort": "1234"
}
},
{
"Image": "docker-wallet:1",
"Mem": "20GB",
"Cpu": 1.0,
"Disk": "20GB",
"Volume": {
"Localhost": "/mnt/md0/${containerId}",
"Volume": "/root/.btcd${containerId}"
},
"NodeId (cluster)": 0,
"ServiceType": "wallet",
"InstanceId": "1...100",
"Port": "portNum",
"Args": {
"Database": "${volume}/init-data.csv.tgz",
"ListenPort": "1234",
"SendPort": "1234"
}
}
]
}
]
}
答案 0 :(得分:2)
在你的JSON中,你有一个拼写错误(一个额外的冒号)。您拨打有问题的字段"Id:"
而不是"Id"
。删除:
,代码应该有效!
请注意,您的NodeId
字段也可能无法填充,因为在JSON中,您将其称为"NodeId (cluster)"
而不是"NodeId"
。字段名称必须与JSON和Go完全匹配。如果要在JSON中使用与Go中不同的字段名称,请使用JSON名称注释结构:
type Example struct {
Name string `json:"firstName"`
...
}