在给定字符串中筛选出由逗号分隔开的字符段并存入列表中

package test;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;


public class zifuchuanshaixuanshuzizifuduan {

	public static void main(String[] args) {
		
      String str = "上传失败！:存在码:8348450470309528211,-1,2.5,-1.8,454aa,hjafj,@,粉红色,83748450309528210,89528212,164,64,654,684684共X个码;";
      
      // 方法1（findNumericFields）示例，可筛选非数字串
      int beg = str.indexOf("码:");
      int end = str.indexOf("共");
      String substring1 = str.substring(beg+2,end);
      List<String> result = findNumericFields(substring1);
      System.out.println(result); // 输出: [8348450470309528211, -1, 2.5, -1.8, 83748450309528210, 89528212, 164, 64, 654, 684684]
     
      // 方法2（stream）示例，不可筛选非数字串
      List<String> result1=Arrays.stream(str.substring(str.indexOf("码:")+2, str.indexOf("共")).split(",")).collect(Collectors.toList());
      System.out.println(result1);// 输出: [8348450470309528211, -1, 2.5, -1.8, 454aa, hjafj, @, 粉红色, 83748450309528210, 89528212, 164, 64, 654, 684684]
      
	}
	
	public static List<String> findNumericFields(String input) {
	    String[] fields = input.split(",");
	    List<String> numericFields = new ArrayList<>();
	    
	    for (String field : fields) {
	        if (field.matches("\\d+")) { // 正则表达式匹配整数或浮点数（去掉非数字字符）
	            numericFields.add(field);
	        } else if (field.matches("-?\\d+(\\.\\d+)?")) { // 匹配负数或带小数点的数
	            numericFields.add(field);
	        }
	    }
	    return numericFields;
	}
}