如何在golang中将双引号中的内容与regexp匹配? [英] How do I match the content in double quotes with regexp in golang?
问题描述
content := `{null,"Age":24,"Balance":33.23}`
rule,_ := regexp.Compile(`"([^\"]+)"`)
results := rule.FindAllString(content,-1)
fmt.Println(results[0]) //"Age"
fmt.Println(results[1]) //"Balance"
有一个json字符串,其值看起来像是"null".
There is a json string with a ``null`` value that it look like this.
此json来自网络api,我不想替换其中的任何内容.
This json is from a web api and i don't want to replace anything inside.
我想使用正则表达式来匹配此json中所有没有双引号的键,并且输出是``Age``和``Balance''而不是``"Age"``和"余额"``.
I want to using regex to match all the keys in this json which are without the double quote and the output are ``Age`` and ``Balance`` but not ``"Age"`` and ``"Balance"``.
我该如何实现?
推荐答案
一种解决方案是使用匹配引号之间任何字符的正则表达式(例如您的示例或".*?"
),然后放置匹配组(又名"regexp.FindAllStringSubmatch(...)
或分别 regexp.FindAllString(...)
.
One solution would be to use a regular expression that matches any character between quotes (such as your example or ".*?"
) and either put a matching group (aka "submatch") inside the quotes or return the relevant substring of the match, using regexp.FindAllStringSubmatch(...)
or regexp.FindAllString(...)
, respectively.
例如(进入操场):
func main() {
str := `{null,"Age":24,"Balance":33.23}`
fmt.Printf("OK1: %#v\n", getQuotedStrings1(str))
// OK1: []string{"Age", "Balance"}
fmt.Printf("OK2: %#v\n", getQuotedStrings2(str))
// OK2: []string{"Age", "Balance"}
}
var re1 = regexp.MustCompile(`"(.*?)"`) // Note the matching group (submatch).
func getQuotedStrings1(s string) []string {
ms := re1.FindAllStringSubmatch(s, -1)
ss := make([]string, len(ms))
for i, m := range ms {
ss[i] = m[1]
}
return ss
}
var re2 = regexp.MustCompile(`".*?"`)
func getQuotedStrings2(s string) []string {
ms := re2.FindAllString(s, -1)
ss := make([]string, len(ms))
for i, m := range ms {
ss[i] = m[1 : len(m)-1] // Note the substring of the match.
}
return ss
}
请注意,如果性能至关重要,则基于简单的基准测试,第二个版本(不包含子匹配项)可能会稍快一些.
Note that the second version (without a submatching group) may be slightly faster based on a simple benchmark, if performance is critical.
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