java读取Csv格式文件

最新推荐文章于 2023-05-23 21:44:15 发布

kuLong_x

最新推荐文章于 2023-05-23 21:44:15 发布

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分类专栏： java 文章标签： java 大数据

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该博客展示了如何使用Java的BufferedReader和FileReader读取CSV文件。通过split()函数以逗号为分隔，将每一行数据存储到List<String[]>中，便于后续处理。示例代码成功读取了'Sharedbikezjut-sample.csv'文件，并打印出部分订单的公司名、出发时间和到达时间。

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java读取Csv格式文件

1.用BufferedReader方法来读取文件
2.spilt()函数以逗号为分割将整行分割，得到一个数组
3.为了后期方便调用函数，我用List进行存储，List<String[]>即为返回值

package 课设.readCsv;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class ReadCsv {
	/* 读取csv文件的方法 
	 * 主要函数是ReadMethod()
	 * 放回类型是List<String[]> 一个List的集合 每一个元素是包含数条信息的数组 
	 * (MsgID/CompanyId/BicycleNo/OrderId/DepartTime/DepartLongitude/DepartLatitude/ArriveTime/ArriveLongitude/ArriveLatitude/DBTime)
	 */
	List<String[]> ReadMethod(){
		String csvFile = "Sharedbikezjut-sample.csv";
        String line = "";
        String cvsSplitBy = ",";
        int count = 0;
        String[] Line = new String[1];
        List<String[]> BikeDataList = new ArrayList<String[]>();
        try (BufferedReader br = new BufferedReader(new FileReader(csvFile))) {
 
            while ((line = br.readLine()) != null) {
            	Line = line.split(cvsSplitBy);//将逗号作为分隔符 划分一行 得到数组[]
            	BikeDataList.add(Line);
               // System.out.println("Order:"+(++count)+" Company:"+Line[1]+" DepartTime: "+Line[4]+ "  ArriveTime:"+Line[7]);
            }
 
        } catch (IOException e) {
            e.printStackTrace();
        }
        return BikeDataList;
	}
    public static void main(String[] args) {
    	 new ReadCsv().ReadMethod();
    }
}

跑出来的结果如下：

Order:29979 Company:hellobike DepartTime: 2018/3/20 9:38  ArriveTime:2018/3/20 9:43
Order:29980 Company:hellobike DepartTime: 2018/3/20 16:03  ArriveTime:2018/3/20 16:09
Order:29981 Company:hellobike DepartTime: 2018/3/20 16:18  ArriveTime:2018/3/20 16:34
Order:29982 Company:hellobike DepartTime: 2018/3/20 18:09  ArriveTime:2018/3/20 18:14
Order:29983 Company:hellobike DepartTime: 2018/3/20 15:26  ArriveTime:2018/3/20 15:27
Order:29984 Company:hellobike DepartTime: 2018/3/20 14:58  ArriveTime:2018/3/20 15:05
Order:29985 Company:hellobike DepartTime: 2018/3/20 11:38  ArriveTime:2018/3/20 11:45
Order:29986 Company:hellobike DepartTime: 2018/3/20 7:25  ArriveTime:2018/3/20 7:33
Order:29987 Company:hellobike DepartTime: 2018/3/20 7:37  ArriveTime:2018/3/20 7:46
Order:29988 Company:hellobike DepartTime: 2018/3/20 15:58  ArriveTime:2018/3/20 16:05
Order:29989 Company:hellobike DepartTime: 2018/3/20 13:04  ArriveTime:2018/3/20 13:09
Order:29990 Company:hellobike DepartTime: 2018/3/20 17:12  ArriveTime:2018/3/20 17:20
Order:29991 Company:hellobike DepartTime: 2018/3/20 11:38  ArriveTime:2018/3/20 11:55
Order:29992 Company:hellobike DepartTime: 2018/3/20 14:46  ArriveTime:2018/3/20 14:51
Order:29993 Company:hellobike DepartTime: 2018/3/20 9:45  ArriveTime:2018/3/20 9:54