試圖在golang中決議xml但得到空結構

我試圖決議一個xml：

附加xml，因為這里太長了https://drive.google.com/file/d/1CPleC1gBAR6n7lcyiR_zVMEjkowo3gUU/view?usp=sharing

type L1CProduct struct {
    XMLName xml.Name `xml:"n1:Level-1C_User_Product"`
    N1GeneralInfo N1GeneralInfo `xml:"n1:General_Info"`
}

type N1GeneralInfo struct {
    XMLName xml.Name `xml:"n1:General_Info"`
    ProductInfo ProductInfo `xml:"Product_Info"`
    SpectralInformationList SpectralInformationList `xml:"Product_Image_Characteristic>Spectral_Information_List"`
}

type SpectralInformationList struct {
    XMLName xml.Name `xml:"Spectral_Information_List"`
    SpectralInformation []SpectralInformation `xml:"Spectral_Information"`
}

type SpectralInformation struct {
    XMLName xml.Name `xml:"Spectral_Information"`
    BandId string `xml:"bandId,attr"`
    PhysicalBand string `xml:"physicalBand,attr"`
}

type ProductInfo struct{
    XMLName xml.Name `xml:"Product_Info"`
    ProductStartTime string `xml:"PRODUCT_START_TIME"`
    GenerationTime string `xml:"GENERATION_TIME"`
    ProductUri string `xml:"PRODUCT_URI"`

}

func parseXml() {
    // Open our xmlFile

    // xmlPath := inProcessPath   "/MTD_MSIL1C.xml"
    xmlPath := "/home/htc/Lizer/backend/InProcessResults/MTD_MSIL1C.xml"
    xmlFile, err := os.Open(xmlPath)
    // if we os.Open returns an error then handle it
    if err != nil {
        fmt.Println(err)
    }

    fmt.Println("Successfully Opened "   xmlPath)
    // defer the closing of our xmlFile so that we can parse it later on
    defer xmlFile.Close()

    // read our opened xmlFile as a byte array.
    byteValue, _ := ioutil.ReadAll(xmlFile)
    fmt.Printf("\nData: %s", byteValue)
    // we initialize our Users array
    var users L1CProduct
    // we unmarshal our byteArray which contains our
    // xmlFiles content into 'users' which we defined above
    xml.Unmarshal(byteValue, &users)
    fmt.Println(users.N1GeneralInfo.ProductInfo.ProductStartTime   "o")
    println(users.N1GeneralInfo.SpectralInformationList.SpectralInformation[1].BandId)
    // we iterate through every user within our users array and
    // print out the user Type, their name, and their facebook url
    // as just an example
    // for i := 0; i < len(users.N1GeneralInfo.SpectralInformationList.SpectralInformation); i   {
    // for i := 0; i < 10; i   {
    //     fmt.Println("Band Id: "   users.N1GeneralInfo.SpectralInformationList.SpectralInformation[i].BandId)
    //     fmt.Println("physicalBand: "   users.N1GeneralInfo.SpectralInformationList.SpectralInformation[i].PhysicalBand)
    // }

}

但是當檔案被正確讀取時，mi xml結構是空的

fmt.Println(users.N1GeneralInfo.ProductInfo.ProductStartTime   "o")
    println(users.N1GeneralInfo.SpectralInformationList.SpectralInformation[1].BandId)

fmt.Println(users.N1GeneralInfo.ProductInfo.ProductStartTime   "o")
println(users.N1GeneralInfo.SpectralInformationList.SpectralInformation[1].BandId)

它就像結構是空的：輸出：**

o 恐慌：運行時錯誤：索引超出范圍 goroutine 1 [運行]：main.parseXml() /home/htc/Lizer/backend/app/pkg/Services/Bandwith/service.go:164 0x3fd main.main() /home/htc/Lizer/backend/app/pkg/Services/Bandwith/service.go:53 0x20**

退出狀態 2

uj5u.com熱心網友回復：

如果你想要:xml 中的決議器

喜歡

xml:"n1:Level-1C_User_Product"

應該：

xml:"https://psd-14.sentinel2.eo.esa.int/PSD/User_Product_Level-1C.xsd Level-1C_User_Product"

請參閱：在 GO 中決議 Xml 以獲取標簽中帶有“：”的屬性

下面是一個演示：

package main

import (
    "encoding/xml"
    "fmt"
    "os"
)

type L1CProduct struct {
    XMLName       xml.Name `xml:"https://psd-14.sentinel2.eo.esa.int/PSD/User_Product_Level-1C.xsd Level-1C_User_Product"`
    N1GeneralInfo N1GeneralInfo
}

type N1GeneralInfo struct {
    XMLName     xml.Name    `xml:"https://psd-14.sentinel2.eo.esa.int/PSD/User_Product_Level-1C.xsd General_Info"`
    ProductInfo ProductInfo `xml:"Product_Info"`
}
type ProductInfo struct {
    XMLName          xml.Name `xml:"Product_Info"`
    ProductStartTime string   `xml:"PRODUCT_START_TIME"`
    GenerationTime   string   `xml:"GENERATION_TIME"`
    ProductUri       string   `xml:"PRODUCT_URI"`
}

func parseXml() {
    // Open our xmlFile

    // xmlPath := inProcessPath   "/MTD_MSIL1C.xml"
    xmlPath := "./MTD_MSIL1C.xml"
    // read our opened xmlFile as a byte array.
    byteValue, _ := os.ReadFile(xmlPath)
    // we initialize our Users array
    var users L1CProduct

    err := xml.Unmarshal(byteValue, &users)
    if err != nil {
        fmt.Printf("%v\n", err)
    }
    fmt.Println(users.N1GeneralInfo.ProductInfo.ProductStartTime   "o")
}

func main() {
    parseXml()
}

以下是輸出：

2022-11-09T16:55:19.024Zo

標籤：xml去

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