我想xml使用golang. 作為使用 的新手go，我閱讀了網(wǎng)絡(luò)上的文章，解釋了如何解析 XML，但我不確定為什么我的返回值nil在這種情況下。package mainimport ( "fmt" //"io/ioutil" "encoding/xml")func check(e error) { if e != nil { panic(e) }}type Books struct { XMLName xml.Name `xml:"Books"` BookList []Book `xml:"Books>Book"`}type Book struct { title string `xml:"title,attr"` author string published string}func main() { //f, err := ioutil.ReadFile("xml/Books.xml") //check(err) var data = []byte(` <Books> <Book title="A Brief History of Time" author="Stephen Hawking" published="1988"> <title>title here</title> A Brief History of Time: From the Big Bang to Black Holes is a 1988 popular-science book by British physicist Stephen Hawking. It became a bestseller and sold more than 10 million copies in 20 years. </Book> <Book title="Steve Jobs" author="Walter Isaacson" published="2011"> Steve Jobs is the authorized self-titled biography book of Steve Jobs. The book was written at the request of Jobs by Walter Isaacson, a former executive at CNN. </Book> </Books> `) b := Books{} o := xml.Unmarshal([]byte(data), &b) fmt.Println(o)}
1 回答
撒科打諢
TA貢獻1934條經(jīng)驗 獲得超2個贊
我將調(diào)試反饋放在評論中，但我剛剛修改了您的示例以使其正常工作，可以在此處進行測試；https://play.golang.org/p/_UIph2je7f
package main
import (
"fmt"
//"io/ioutil"
"encoding/xml"
)
func check(e error) {
if e != nil {
panic(e)
}
}
type Books struct {
XMLName xml.Name `xml:"Books"`
BookList []Book `xml:"Book"`
}
type Book struct {
Title string `xml:"title,attr"`
Author string `xml:"author,attr"`
Published string `xml:"published,attr"`
}
func main() {
//f, err := ioutil.ReadFile("xml/Books.xml")
//check(err)
var data = []byte(`
<Books>
<Book title="A Brief History of Time" author="Stephen Hawking" published="1988">
<title>title here</title>
A Brief History of Time: From the Big Bang to Black Holes is a 1988 popular-science book by British physicist Stephen Hawking. It became a bestseller and sold more than 10 million copies in 20 years.
</Book>
<Book title="Steve Jobs" author="Walter Isaacson" published="2011">
Steve Jobs is the authorized self-titled biography book of Steve Jobs. The book was written at the request of Jobs by Walter Isaacson, a former executive at CNN.
</Book>
</Books>
`)
b := Books{}
o := xml.Unmarshal([]byte(data), &b)
fmt.Println(o)
fmt.Println(b)
}
這是我所做的四項更改的概要；
1）打印Books對象而不是從返回的錯誤Unmarshal
2）大寫字段的第一個字母，Book使它們“導(dǎo)出”，以便其他包（在這種情況下為解組器）可以獲取/設(shè)置它們
3）添加xml屬性。在導(dǎo)出字段時，它使它沒有隱式字符串匹配，因此您必須明確指定將哪個 xml 值讀入每個字段
4)BookList為此更新 XML 路徑，您說它將是 Books>Book 但這意味著您的 xml 中不存在另一個嵌套級別。這個對象是Books，您想要在該列表中的元素將具有簡單的相對 xpath，Book這就是您放置在那里的內(nèi)容。
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