Java String Split by Delimiter split(String value, String delimiter)

Declaration

public static List<String> split(String value, String delimiter) 

Method Source Code

//package com.java2s;
/*//from   w  ww . j a v  a 2 s  .c  om
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.util.ArrayList;
import java.util.List;

public class Main {
    /**
    *
    * Splits a delimiter separated string, tolerating presence of non separator commas
    * within double quoted segments.
    *
    * Eg.
    * com.ibm.ws.eba.helloWorldService;version="[1.0.0, 1.0.0]" &
    * com.ibm.ws.eba.helloWorldService;version="1.0.0"
    * com.ibm.ws.eba.helloWorld;version="2";bundle-version="[2,30)"
    * com.acme.foo;weirdAttr="one;two;three";weirdDir:="1;2;3"
    *  @param value          the value to be split
    *  @param delimiter      the delimiter string such as ',' etc.
    *  @return List<String>  the components of the split String in a list
    */
    public static List<String> split(String value, String delimiter) {
        List<String> result = new ArrayList<String>();
        if (value != null) {
            String[] packages = value.split(delimiter);

            for (int i = 0; i < packages.length;) {
                String tmp = packages[i++].trim();
                // if there is a odd number of " in a string, we need to append
                while (count(tmp, "\"") % 2 != 0) {
                    // check to see if we need to append the next package[i++]
                    if (i < packages.length)
                        tmp = tmp + delimiter + packages[i++].trim();
                    else
                        // oops. The double quotes are not paired up. We have reached to the end of the string.
                        throw new IllegalArgumentException("Unmatched double quotes: " + tmp);
                }

                result.add(tmp);

            }
        }
        return result;
    }

    /**
     * count the number of characters in a string
     * @param parent The string to be searched
     * @param subString The substring to be found
     * @return the number of occurrence of the subString
     */
    private static int count(String parent, String subString) {

        int count = 0;
        int i = parent.indexOf(subString);
        while (i > -1) {
            if (parent.length() >= i + 1)
                parent = parent.substring(i + 1);
            count++;
            i = parent.indexOf(subString);
        }
        return count;
    }
}

Related

1. split(String stringToSplit, char delimiter)
2. split(String strToSplit, char delimiter)
3. split(String text, String delimiter)
4. split(String value, char delim)
5. split(String value, char delimiter)
6. split(String value, String delimiter)
7. split(String value, String[] delimiters)
8. split(String what, char delim)
9. split(String[] srcArray, String delimiterRegExp)