JSP中的StringTokenizer是怎么用的？

StringTokenizer st = new StringTokenizer(Message,",");
String[] items = new String[st.countTokens()];
int i = 0;
while(st.hasMoreTokens())
{
items[i++] = st.nextToken();
}
String Message1 = items[0];
String Message2 = items[1];
String Message3 = items[2];

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