springboot jar 读取csv文件

文件路径 ： /resource/csv/nation.csv

package www.test.com.common.utils;

import cn.hutool.core.text.csv.CsvData;
import cn.hutool.core.text.csv.CsvReader;
import cn.hutool.core.text.csv.CsvRow;
import cn.hutool.core.text.csv.CsvUtil;
import com.google.common.collect.Maps;

import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Map;

public class DictionaryCsvUtil {

    public static Map getNationMap(){
        Map map = Maps.newHashMap();
        CsvReader reader = CsvUtil.getReader();
        //从文件中读取CSV数据
        InputStream inputStream = DictionaryCsvUtil.class.getClassLoader().getResourceAsStream("csv" + File.separator + "nation.csv");
        if (null == inputStream){
            return null;
        }
        InputStreamReader inputStreamReader = new InputStreamReader(inputStream, StandardCharsets.UTF_8);
        CsvData data = reader.read(inputStreamReader);
//        CsvData data = reader.read(cn.hutool.core.io.FileUtil.file("csv" + File.separator + "nation.csv"));
        List rows = data.getRows();
        //遍历行
        for (CsvRow csvRow : rows) {
            map.put(csvRow.get(0), Integer.parseInt(csvRow.get(1)));
        }
        return map;
    }
}

   cn.hutool
    hutool-all
    5.8.0.M3



    com.google.guava
    guava
    30.1-jre