/** 
 * @param args 
 */ 
public static void main(String[] args) { 
 
  String srcText = "Hello World"; 
  String findText = "e"; 
  int num = appearNumber(srcText, findText); 
  System.out.println(num); 
} 
 
/** 
 * 获取指定字符串出现的次数 
 * 
 * @param srcText 源字符串 
 * @param findText 要查找的字符串 
 * @return 
 */ 
public static int appearNumber(String srcText, String findText) { 
  int count = 0; 
  Pattern p = Pattern.compile(findText); 
  Matcher m = p.matcher(srcText); 
  while (m.find()) { 
    count++; 
  } 
  return count; 
}