<dependency>
            <groupId>com.opencsv</groupId>
            <artifactId>opencsv</artifactId>
            <version>4.5</version>
        </dependency>


import com.opencsv.CSVWriter;

import java.io.*;
import java.util.ArrayList;
import java.util.List;

public class OpenCsvUtils {

    public static void main(String[] args){

        List<Object> head=new ArrayList<>();
        head.add("编号");
        head.add("姓名");
        head.add("手机号");

        List<List<Object>> dataList=new ArrayList<>();

        List<Object> row1=new ArrayList<>();
        row1.add("编号\n编号\n编号");
        row1.add("姓名\n姓名\n姓名");
        row1.add("手机号");
        dataList.add(row1);
        dataList.add(row1);

        createCSVFile(head, dataList,"输出目录","文件名");
    }

    /**
     * 写一行
     * @param row
     * @param csvWriter
     */
    private static void writeRow(List<Object> row,CSVWriter csvWriter){

        String[] rowStr=new String[row.size()];
        for (int x=0;x<row.size();x++) {
            rowStr[x]=row.get(x).toString();
        }
        csvWriter.writeNext(rowStr);
    }

    /**
     * CSV文件生成方法
     *
     * @param head       标题行
     * @param dataList   具体内容
     * @param outPutPath 输出文件路径
     * @param filename   文件名称
     * @return 返回值
     */
    public static File createCSVFile(List<Object> head, List<List<Object>> dataList,
                                     String outPutPath, String filename) {

        File csvFile = null;
        FileOutputStream out= null;
        CSVWriter csvWriter =null;
        try {
            csvFile = new File(outPutPath + File.separator + filename + ".csv");
            File parent = csvFile.getParentFile();
            if (parent != null && !parent.exists()) {
                parent.mkdirs();
            }
            csvFile.createNewFile();

            out = new FileOutputStream(csvFile);
            csvWriter = new CSVWriter(new OutputStreamWriter(out,"utf-8"));
            // 写入文件头部
            writeRow(head, csvWriter);
            //写入body
            for(List<Object> row:dataList){
                writeRow(row, csvWriter);
            }

            csvWriter.flush();
        } catch (FileNotFoundException | UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                csvWriter.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return csvFile;
    }

}