需要修剪Java字符串

Question

I need help in trimming a string url.

Let's say the String is http://myurl.com/users/232222232/pageid

What i would like returned would be /232222232/pageid

Now the 'myurl.com' can change but the /users/ will always be the same.

Answer 1

I suggest you use substring and indexOf("/users/") .

String url = "http://myurl.com/users/232222232/pageid";
String lastPart = url.substring(url.indexOf("/users/") + 6);

System.out.println(lastPart);     // prints "/232222232/pageid"

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A slightly more sophisticated variant would be to let the URL class parse the url for you:

URL url = new URL("http://myurl.com/users/232222232/pageid");
String lastPart = url.getPath().substring(6);

System.out.println(lastPart);     // prints "/232222232/pageid"

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And, a third approach, using regular expressions:

String url = "http://myurl.com/users/232222232/pageid";
String lastPart = url.replaceAll(".*/users", "");

System.out.println(lastPart);     // prints "/232222232/pageid"

Answer 2

String rest = url.substring(url.indexOf("/users/") + 6);

Answer 3

string.replaceAll(".*/users(/.*/.*)", "$1");

Answer 4

You can use split(String regex,int limit) which will split the string around the pattern in regex at most limit times, so...

String url="http://myurl.com/users/232222232/pageid";
String[] parts=url.split("/users",1);
//parts={"http://myurl.com","/232222232/pageid"}
String rest=parts[1];
//rest="/232222232/pageid"

The limit is there to prevent strings like "http://myurl.com/users/232222232/users/pageid" giving answers like "/232222232" .

Answer 5

You can use String.indexOf() and String.substring() in order to achieve this:

String pattern = "/users/";
String url = "http://myurl.com/users/232222232/pageid";
System.out.println(url.substring(url.indexOf(pattern)+pattern.length()-1);