我正在通过命令行读取文件。
由于该文件是Oracle的JSON导出，因此具有一定的结构。由于某种原因，此默认结构不是有效的JSON。例：
// This isn't valid JSON
,"items":
[
{"id":123,"language":"ja-JP","location":"Osaka"}
,{"id":33,"language":"ja-JP","location":"Tokyo"}
,{"id":22,"language":"ja-JP","location":"Kentok"}
]}
我希望它只是一个对象数组，从而具有预期的输出：
// This is valid json
[
{"id":123,"language":"ja-JP","location":"Osaka"}
,{"id":33,"language":"ja-JP","location":"Tokyo"}
,{"id":22,"language":"ja-JP","location":"Kentok"}
]
因此，我需要}从文件的最后一行中删除第1行（全部）以及最后一行。
该文件是通过命令行从输入中解析的：
file, err := ioutil.ReadFile(os.Args[1])
我正在尝试以这种方式删除无效的字符串/单词，但它不会重新格式化任何内容：
// in func main()
removeInvalidJSON(file, os.Args[1])
// later on ..
func removeInvalidJSON(file []byte, path string) {
info, _ := os.Stat(path)
mode := info.Mode()
array := strings.Split(string(file), "\n")
fmt.Println(array)
//If we have the clunky items array which is invalid JSON, remove the first line
if strings.Contains(array[0], "items") {
fmt.Println("Removing items")
array = append(array[:1], array[1+1:]...)
}
// Finds the last index of the array
lastIndex := array[len(array)-1]
// If we have the "}" in the last line, remove it as this is invalid JSON
if strings.Contains(lastIndex, "}") {
fmt.Println("Removing }")
strings.Trim(lastIndex, "}")
}
// Nothing changed?
fmt.Println(array)
ioutil.WriteFile(path, []byte(strings.Join(array, "\n")), mode)
}
上面的函数确实写入了我可以看到的文件-但据我所知，它不会更改数组，也不会将其写入文件中。
如何有效地远程文件的第一行以及文件中的最后一个假花括号}？
我在另一个函数中将JSON解组：是否有使用该"encoding/json"库更“干净”地执行JSON的方法？
此代码有几个重大问题，导致其行为不正常。我在下面的评论中提到了这些：
func removeInvalidJSON(file []byte, path string) {
info, _ := os.Stat(path)
mode := info.Mode()
array := strings.Split(string(file), "\n")
fmt.Println(array)
//If we have the clunky items array which is invalid JSON, remove the first line
if strings.Contains(array[0], "items") {
fmt.Println("Removing items")
// If you just want to remove the first item, this should be array = array[1:].
// As written, this appends the rest of the array to the first item, i.e. nothing.
array = append(array[:1], array[1+1:]...)
}
// Finds the last ~index~ *line* of the array
lastIndex := array[len(array)-1]
// If we have the "}" in the last line, remove it as this is invalid JSON
if strings.Contains(lastIndex, "}") {
fmt.Println("Removing }")
// Strings are immutable. `strings.Trim` does nothing if you discard the return value
strings.Trim(lastIndex, "}")
// After the trim, if you want this to have any effect, you need to put it back in `array`.
}
// Nothing changed?
fmt.Println(array)
ioutil.WriteFile(path, []byte(strings.Join(array, "\n")), mode)
}
我认为您想要的更像是：
func removeInvalidJSON(file []byte, path string) {
info, _ := os.Stat(path)
mode := info.Mode()
array := strings.Split(string(file), "\n")
fmt.Println(array)
//If we have the clunky items array which is invalid JSON, remove the first line
if strings.Contains(array[0], "items") {
fmt.Println("Removing items")
array = array[1:]
}
// Finds the last line of the array
lastLine := array[len(array)-1]
array[len(array)-1] = strings.Trim(lastLine, "}")
fmt.Println(array)
ioutil.WriteFile(path, []byte(strings.Join(array, "\n")), mode)
}
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