基于Java将Excel科学计数法解析成数字

import java.text.DecimalFormat;
import java.util.regex.Pattern;
public class Test {

  static Pattern pattern = Pattern.compile("(-?\\d+\\.?\\d*)[Ee]{1}[\\+-]?[0-9]*");
  static DecimalFormat ds = new DecimalFormat("0");
  static boolean isENum(String input) {//判断输入字符串是否为科学计数法
    return pattern.matcher(input).matches();
  }

  public static void main(String[] args) {
    String str = "6.18404E+17";
    System.out.println(isENum(str));
    if (isENum(str)) {
      String sPhone = ds.format(Double.parseDouble(str)).trim();
      System.out.println(sPhone);
    }
  }
  
}