java查找字符串中的包含子字符串的个数

private static int getNumOfIndexStr(String searchStr, String indexStr) throws Exception {
String me = "AdjustmentLogic.getNumOfIndexStr()";
int indexStrNum = 0;
String moveIndexStr = "";
int index = searchStr.indexOf(indexStr);
if (index != -1) {
indexStrNum = indexStrNum + indexStr.length();
moveIndexStr = searchStr.substring(index + 1);
indexStrNum = indexStrNum + getNumOfIndexStr(moveIndexStr, indexStr);
}


return indexStrNum;
}