Super CSV Annotationを使う
https://mygreen.github.io/super-csv-annotation/project-info.html

EclipseでMavenプロジェクトを新規作成、Javaのバージョンは1.8

pom.xml

	<dependencies>
		<dependency>
			<groupId>com.github.mygreen</groupId>
			<artifactId>super-csv-annotation</artifactId>
			<version>2.3</version>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<version>1.18.26</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-simple</artifactId>
			<version>2.0.6</version>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>2.0.6</version>
		</dependency>
	</dependencies>

XXXCsvBean.java

import com.github.mygreen.supercsv.annotation.CsvBean;
import com.github.mygreen.supercsv.annotation.CsvColumn;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@CsvBean
@NoArgsConstructor
@AllArgsConstructor
@Data
public class XXXCsvBean {
    @CsvColumn(number = 1)
    private String user;

    @CsvColumn(number = 2)
    private String email;
}

XXX.java

                try (CsvAnnotationBeanReader<XXXCsvBean> csvReader = getCsvReader(inputStream /* 標準入力ならSystem.in */)) {
                    csvReader.getHeader(true); // ヘッダ行スキップ
                    XXXCsvBean readRecord;
                    while ((readRecord = csvReader.read()) != null) { // Windowsの標準入力ならCTRL+ZでEOFを入力するまで
                        String user = readRecord.getUser();
                        // do something
                    }
                }

--

    private CsvAnnotationBeanReader<XXXCsvBean> getCsvReader(InputStream inputStream) {
        return new CsvAnnotationBeanReader<>(XXXCsvBean.class,
                new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8)), // Windowsの標準入力ならキャラセット指定なし
                CsvPreference.STANDARD_PREFERENCE); // TSVならTAB_PREFERENCE
    }