Taiwan Hadoop Forum

各位先進好：
請問如何使用特定分隔符號(ex: , | ; .)來分隔一個字串，
如StringTokenizer itr = new StringTokenizer(value.toString()); 此程式碼預設是使用空白符號分割一個字串，
如果想改用其他分隔符號該如何做呢?
謝謝回覆~

public static class TokenizerMapper extends Mapper<Object, Text, Text, IntWritable>{
private final static IntWritable one = new IntWritable(1);
private Text word = new Text();

public void map(Object key, Text value, Context context) throws IOException, InterruptedException {
StringTokenizer itr = new StringTokenizer(value.toString());
while (itr.hasMoreTokens()) {
word.set(itr.nextToken());
context.write(word, one);
}
}
}

http://docs.oracle.com/javase/7/docs/api/java/util/StringTokenizer.html

StringTokenizer(String str, String delim)

其中 delim 就是分隔符號。

- Jazz

搞定^^ 感謝~