Javascript 从javascript中的字符串路径获取文件名？
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Get filename from string path in javascript?
提问by 001
How to get the filename from string-path in javascript?
如何从javascript中的字符串路径获取文件名？
Here is my code
这是我的代码
var nameString = "/app/base/controllers/filename.js"; //this is the input path string
do something here to get only the filename
在这里做一些事情来只获取文件名
var name = ??? //this value should equal to filename.js
回答by levi
Try this:
尝试这个：
var nameString = "/app/base/controllers/filename.js";
var filename = nameString.split("/").pop();
回答by Brandon
I don't know why you'd want to us a regex to do this. Surely the following would be sufficient:
我不知道你为什么要给我们一个正则表达式来做到这一点。当然，以下内容就足够了：
var nameString = "/app/base/controllers/filename.js";
var nameArray = nameString.split('/');
var name = nameArray[nameArray.length - 1];
回答by godspeedlee
a pure regex solution: \/([^\\\/:*?\"<>|]+)$
you will get file name from group 1
纯正则表达式解决方案：\/([^\\\/:*?\"<>|]+)$
您将从第 1 组获得文件名
回答by joseluisq
Here one more detailed solution using Regular Expressions.
这是使用正则表达式的更详细的解决方案。
Alternative 1 (generic):Get a file name (whatever) from a string path.
备选方案 1（通用）：从字符串路径中获取文件名（随便）。
const FILE_NAME_REGEX = /(.+)\/(.+)$/
console.log("/home/username/my-package/my-file1.ts".replace(FILE_NAME_REGEX, ''))
console.log("/home/username/my-package/my-file2.js".replace(FILE_NAME_REGEX, ''))Alternative 2 (advanced):Get onlya .tsfile name from a string path.
方案2（高级）：获取只有一个.ts文件从一个字符串的路径名。
const JS_PATH = "/home/username/my-package/my-file.spec.js"
const TS_PATH = "/home/username/my-package/my-file.spec.ts"
// RegExp accepts only `.ts` file names in lower case with optional dashes and dots
const TS_REGEX = /(.+)\/([a-z.-]+\.(ts))$/
// a. Get only the file name of a `.ts` path
console.log(TS_PATH.replace(TS_REGEX, ''))
// b. Otherwise it will return the complete path
console.log(JS_PATH.replace(TS_REGEX, ''))Note:Additionally you can test first the regular expressions above in order to validate them before to getting the expected value.
注意：此外，您可以先测试上面的正则表达式，以便在获得预期值之前对其进行验证。
TS_REGEX.test(TS_PATH)
// > true
TS_REGEX.test(JS_PATH)
// > false
More information at MDN - Regular Expressions
