csv文件处理——Opencsv

public class Person {

    @CsvBindByName(column = "性别")
    private String sex;

    @CsvBindByName(column = "姓名")
    private  String name;

    @CsvBindByName(column = "编号")
    private String id;
}
//省略getter和setter方法


    @Test
    public void testHeaderColumn() throws IOException {
        String fileName = "D:\\app\\share\\eaglewood-client\\download\\20190605\\testofTab.csv";
        InputStreamReader is = new InputStreamReader(CsvUtil.getInputStream(new  FileInputStream(fileName)), "utf-8");
        HeaderColumnNameMappingStrategy<Person> mappingStrategy = new HeaderColumnNameMappingStrategy<>();
        mappingStrategy.setType(Person.class);
        CsvToBean<Person> build = new CsvToBeanBuilder<Person>(is).withMappingStrategy(mappingStrategy).withSeparator(',').build();
        List<Person> personList = build.parse();
        for(Person person:personList){
            System.out.println(person);
        }
    }

 /**
     * 读取流中前面的字符，看是否有bom，如果有bom，将bom头先读掉丢弃
     *  (opencsv 按列名获取bean对象，第一列缺失的情况)
     *  InputStreamReader is = new InputStreamReader(
     *  CsvUtil.getInputStream(new  FileInputStream(fileName)), "utf-8");
     * @param in
     * @return
     * @throws IOException
     */
    public static InputStream getInputStream(InputStream in) throws IOException {

        PushbackInputStream testin = new PushbackInputStream(in);
        int ch = testin.read();
        if (ch != 0xEF) {
            testin.unread(ch);
        } else if ((ch = testin.read()) != 0xBB) {
            testin.unread(ch);
            testin.unread(0xef);
        } else if ((ch = testin.read()) != 0xBF) {
            throw new IOException("错误的UTF-8格式文件");
        } else {
        }
        return testin;
    }