Splitting Java string with quotation marks [duplicate]

This question already has answers here: Closed 11 years ago.

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Can you recommend a Java library for reading (and possibly writing) CSV files?

I need to split the String in Java. The separator is the space character. String may include the paired quotation marks (with some text and spaces inside) - the whole body inside the paired quotation marks should be considered as the single token. Example:

 
Input:
       token1 "token 2"  token3

Output: array of 3 elements:
         token1
         token 2
         token3  

开发者_JAVA技巧

How to do it? Thanks!

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Split twice. First on quotes, then on spaces.

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Assuming that the other solutions will not work for you, because they do not properly detect matching quotes or ignore spaces within quoted text, try something like:

private void addTokens(String tokenString, List<String> result) {
    String[] tokens = tokenString.split("[\\r\\n\\t ]+");
    for (String token : tokens) {
        result.add(token);
    }
}

List<String> result = new ArrayList<String>();
while (input.contains("\"")) {
    String prefixTokens = input.substring(0, input.indexOf("\""));
    input = input.substring(input.indexOf("\"") + 1);
    String literalToken = input.substring(0, input.indexOf("\""));
    input.substring(input.indexOf("\"") + 1);

    addTokens(prefixTokens, result);
    result.add(literalToken);
}

addTokens(input, result);

Note that this won't handle unbalanced quotes, escaped quotes, or other cases of erroneous/malformed input.

---

import java.util.StringTokenizer; 
class STDemo { 
    static String in = "token1;token2;token3"

    public static void main(String args[]) { 

        StringTokenizer st = new StringTokenizer(in, ";"); 

        while(st.hasMoreTokens()) { 
            String val = st.nextToken(); 
            System.out.println(val); 
        } 
    } 
}

this is easy way to string tokenize