Java 生成 CSV 文件

package com.example;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class TestCsv {

    /**
     * 转义字符串中的特殊字符，例如英文逗号
     * @param data
     * @return
     */
    public static String escapeSpecialCharacters(String data) {
        String escapedData = data.replaceAll("\\R", " ");
        if (data.contains(",") || data.contains("\"") || data.contains("'")) {
            data = data.replace("\"", "\"\"");
            escapedData = "\"" + data + "\"";
        }
        return escapedData;
    }

    /**
     * 将字符串数转换为csv格式的一行内容，用英文逗号分隔
     * @param data
     * @return
     */
    public static String convertToCSV(String[] data) {
        return Stream.of(data)
                .map(TestCsv::escapeSpecialCharacters)
                .collect(Collectors.joining(","));
    }

    /**
     * 写 csv 文件
     *
     * @param filePath
     * @param dataLineList
     */
    public static void writeCsvFile(String filePath, List<String[]> dataLineList) {
        File csvOutputFile = new File(filePath);
        try (PrintWriter pw = new PrintWriter(csvOutputFile)) {
            dataLineList.stream()
                    .map(TestCsv::convertToCSV)
                    .forEach(pw::println);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }


    public static void main(String[] args) {
        List<String[]> dataLineList = new ArrayList<>();
        dataLineList.add(new String[]
                { "你好", "带换行\n和带英文逗号," });
        dataLineList.add(new String[]
                { "世界", "中国" });
        writeCsvFile("/tmp/test.csv", dataLineList);
    }

}

$ cat /tmp/test.csv
你好,"带换行
和带英文逗号,"
世界,中国

package com.example;

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public class TestCsv {

    /**
     * 转义字符串中的特殊字符，例如英文逗号
     * @param data
     * @return
     */
    public static String escapeSpecialCharacters(String data) {
        String escapedData = data.replaceAll("\\R", " ");
        if (data.contains(",") || data.contains("\"") || data.contains("'")) {
            data = data.replace("\"", "\"\"");
            escapedData = "\"" + data + "\"";
        }
        return escapedData;
    }

    /**
     * 将字符串数转换为csv格式的一行内容，用英文逗号分隔
     * @param data
     * @return
     */
    public static String convertToCSV(String[] data) {
        return Stream.of(data)
                .map(TestCsv::escapeSpecialCharacters)
                .collect(Collectors.joining(","));
    }

    /**
     * 写 csv 文件
     *
     * @param filePath
     * @param dataLineList
     * @param fileEncoding  文件编码，如 GBK
     */
    public static void writeCsvFile(String filePath, List<String[]> dataLineList, String fileEncoding) {
        try (BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filePath), fileEncoding))) {
            for (String[] dataLine : dataLineList) {
                String s = convertToCSV(dataLine);
                writer.write(s);
                writer.newLine();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    public static void main(String[] args) {
        List<String[]> dataLineList = new ArrayList<>();
        dataLineList.add(new String[]
                { "你好", "带换行\n和带英文逗号," });
        dataLineList.add(new String[]
                { "世界", "中国" });
        writeCsvFile("/tmp/test1.csv", dataLineList, "GBK");
    }

}

$ cat /tmp/test1.csv
���,"����
�ʹ�Ӣ�Ķ���,"
����,�й�