如何读取csv文件用java

以下是两种Java读取CSV文件的方法：

1.使用Java自带的CSV库

import java.io.BufferedReader;import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class ReadCSV {
    public static void main(String[] args) {
        String csvFile = "path/to/csv/file.csv";
        String line = "";
        String cvsSplitBy = ",";
        List<String[]> csvData = new ArrayList<>();

        try (BufferedReader br = new BufferedReader(new FileReader(csvFile))) {
            while ((line = br.readLine()) != null) {
                String[] data = line.split(cvsSplitBy);
                csvData.add(data);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        // 打印读取到的数据
        for (String[] data : csvData) {
            for (String item : data) {
                System.out.print(item + " ");
            }
            System.out.println();
        }
    }
}

2.使用OpenCSV库

import com.opencsv.CSVReader;

import java.io.FileReader;
import java.io.IOException;
import java.util.List;

public class ReadCSV {
    public static void main(String[] args) {
        String csvFile = "path/to/csv/file.csv";
        List<String[]> csvData = null;

        try (CSVReader reader = new CSVReader(new FileReader(csvFile))) {
            csvData = reader.readAll();
        } catch (IOException e) {
            e.printStackTrace();
        }

        // 打印读取到的数据
        for (String[] data : csvData) {
            for (String item : data) {
                System.out.print(item + " ");
            }
            System.out.println();
        }
    }
}