取得两个标识之外的数据〔爬虫片断〕

  private String getOutter(String Asource, String startToken, String endToken) {    StringBuffer result = new StringBuffer();    int indexToken1 = Asource.indexOf(startToken);

    if (indexToken1 == -1) {      return "";    }    int end1 = indexToken1;    indexToken1 += startToken.length();    //int indexToken2 = Asource.indexOf(endToken,indexToken1);    int indexToken2 = Asource.indexOf(endToken);    indexToken2 += endToken.length();    if (indexToken2 == -1) {      return "";    }    // Extract the price and convert to a double    result.append(Asource.substring(0, end1));    result.append(Asource.substring(indexToken2, Asource.length()));    return result.toString();  }