java实现解析csv文件方法一：通过IO流解析，转化数组形式

1.pom.xml引入jar包

        <!--csv-->
        <dependency>
            <groupId>com.opencsv</groupId>
            <artifactId>opencsv</artifactId>
            <version>4.4</version>
        </dependency>

2.使用IO流解析，转化数组形式

/**
     * <b>将csv文件通过IO流解析，转化数组形式的集合<b>
     *
     * @param fileName 文件(路径+csv文件名）
     */
    public static List<String[]> csv(String fileName) {
        List<String[]> csvList = new ArrayList<String[]>();
        if (null != in) {
            try {
                InputStreamReader is = new InputStreamReader(new  FileInputStream(fileName),"gbk");
                CSVParser csvParser = new CSVParserBuilder().build();
                CSVReader reader = new CSVReaderBuilder(is).withCSVParser(csvParser).build();
                csvList = reader.readAll();
            }catch (UnsupportedEncodingException e){
                e.printStackTrace();
            }catch (IOException e) {
                e.printStackTrace();
            }
        }
        return csvList;
    }

3.调用测试main

public static void main(String[] args) throws IOException{
       
        List<String[]> strings = csv("路径+csv文件名");
        System.out.println("读取成功");
        for (String[] csvs:strings) {
            for (String s:csvs) {
                System.out.println(s);
            }
        }

    }