使用 String.split() 在双管道 (||) 上拆分字符串

Question

I'm trying to split the string with double pipe(||) being the delimiter.String looks something like this:

String str ="user@email1.com||user@email2.com||user@email3.com";

i'm able to split it using the StringTokeniser.The javadoc says the use of this class is discouraged and instead look at String.split as option.

StringTokenizer token = new StringTokenizer(str, "||");

The above code works fine.But not able to figure out why below string.split function not giving me expected result..

String[] strArry = str.split("\\||");

Where am i going wrong..?

Answer 1

You must escape every single | like this str.split("\\\\|\\\\|")

Answer 2

String.split() uses regular expressions. You need to escape the string that you want to use as divider.

Pattern has a method to do this for you, namely Pattern.quote(String s) .

String[] split = str.split(Pattern.quote("||"));

Answer 3

试试这个：

String[] strArry = str.split("\\|\\|");

Answer 4

You can try this too...

String[] splits = str.split("[\\|]+");

Please note that you have to escape the pipe since it has a special meaning in regular expression and the String.split() method expects a regular expression argument.

Answer 5

Try this

String yourstring="Hello || World";
String[] storiesdetails = yourstring.split("\\|\\|");

Answer 6

For this you can follow two different approaches you can follow whichever suites you best:

Approach 1:

By Using String SPLIT functionality

String str = "a||b||c||d";
String[] parts = str.split("\\|\\|");

This will return you an array of different values after the split:

parts[0] = "a"
parts[1] = "b"
parts[2] = "c"
parts[3] = "d"

Approach 2:

By using PATTERN and MATCHER

import java.util.regex.Matcher;
import java.util.regex.Pattern;

String str = "a||b||c||d";

Pattern p = Pattern.compile("\\|\\|");
Matcher m = p.matcher(str);

while (m.find()) {
    System.out.println("Found two consecutive pipes at index " + m.start());
}

This will give you the index positions of consecutive pipes:

parts[0] = "a"
parts[1] = "b"
parts[2] = "c"
parts[3] = "d"