如何在spring batch的单项阅读器中同时读取逗号分隔和管道分隔的csv文件

public class CustomItemReader implements ItemReader<Person> {
    private String[] fileNames; // 存储要读取的文件名
    private int currentIndex = 0; // 当前读取的文件索引
    private BufferedReader reader; // 用于读取文件内容的BufferedReader

    public CustomItemReader(String[] fileNames) {
        this.fileNames = fileNames;
    }

    @Override
    public Person read() throws Exception {
        if (reader == null) {
            if (currentIndex < fileNames.length) {
                // 打开当前文件的BufferedReader
                reader = new BufferedReader(new FileReader(fileNames[currentIndex]));
            } else {
                return null; // 所有文件都已读取完毕，返回null表示结束
            }
        }

        String line = reader.readLine();
        if (line != null) {
            // 解析CSV行数据并返回Person对象
            String[] fields = line.split(","); // 逗号分隔的CSV文件
            // 或者使用管道分隔的CSV文件
            // String[] fields = line.split("\\|");
            return new Person(fields[0], fields[1], fields[2]);
        } else {
            reader.close();
            reader = null;
            currentIndex++;
            return read(); // 递归调用read方法读取下一个文件的数据
        }
    }
}

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:batch="http://www.springframework.org/schema/batch"
       xmlns:task="http://www.springframework.org/schema/task"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
            http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/batch http://www.springframework.org/schema/batch/spring-batch.xsd
            http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd">

    <!-- 配置自定义的ItemReader -->
    <bean id="customItemReader" class="com.example.CustomItemReader">
        <constructor-arg>
            <array>
                <value>file1.csv</value>
                <value>file2.csv</value>
            </array>
        </constructor-arg>
    </bean>

    <!-- 配置Step -->
    <batch:job id="myJob">
        <batch:step id="myStep">
            <batch:tasklet>
                <batch:chunk reader="customItemReader" writer="itemWriter" commit-interval="10"/>
            </batch:tasklet>
        </batch:step>
    </batch:job>

    <!-- 其他配置省略 -->

</beans>