StringTokenizer and String split - split on special character

问题

I have the string:

2|HOME ELECTRONICS| |0|0| | | | |0| |

I want to separate all tokens delimited by | in the above string.

I tried to tokenize it with StringTokenizer but it doesn't consider space as a token.

Also, I tried split("|") but it gives each character of the above string as elements in returned string array.

What should I do?

回答1:

Try

string.split("\\|");

| is a special character and must be espaced with escape character \. In Java \ is written as \\.

That is because String#split() takes regular expression as a parameter.

In a regex special chars like ., |, (, etc must be escaped. Otherwise, Java will think you are actually using the special char (for example the | means OR).

回答2:

Try Scanner instead of StringTokenizer

    Scanner sc = new Scanner(str);
    sc.useDelimiter("\\|");
    while(sc.hasNext()) {
        String e = sc.next();
    }

来源：https://stackoverflow.com/questions/17148150/stringtokenizer-and-string-split-split-on-special-character