下面是一个使用Apache POI的HSSFListener解析日期的示例代码：

import org.apache.poi.hssf.eventusermodel.HSSFListener;
import org.apache.poi.hssf.eventusermodel.HSSFRequest;
import org.apache.poi.hssf.record.*;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

import java.io.FileInputStream;
import java.io.IOException;
import java.util.Date;

public class DateParser implements HSSFListener {
    public static void main(String[] args) throws IOException {
        String fileName = "path/to/your/excel/file.xls";

        FileInputStream fis = new FileInputStream(fileName);
        POIFSFileSystem poifs = new POIFSFileSystem(fis);
        DateParser dateParser = new DateParser();
        HSSFRequest request = new HSSFRequest();
        request.addListenerForAllRecords(dateParser);
        HSSFEventFactory factory = new HSSFEventFactory();
        factory.processWorkbookEvents(request, poifs);
        
        fis.close();
    }

    @Override
    public void processRecord(Record record) {
        switch (record.getSid()) {
            case BOFRecord.sid:
                BOFRecord bofRecord = (BOFRecord) record;
                if (bofRecord.getType() == BOFRecord.TYPE_WORKBOOK) {
                    System.out.println("Start parsing workbook");
                }
                break;
            case SSTRecord.sid:
                // Process shared string table
                SSTRecord sstRecord = (SSTRecord) record;
                break;
            case BlankRecord.sid:
                // Process blank cell
                BlankRecord blankRecord = (BlankRecord) record;
                break;
            case NumberRecord.sid:
                // Process numeric cell
                NumberRecord numberRecord = (NumberRecord) record;
                if (DateUtil.isCellDateFormatted(numberRecord)) {
                    Date date = DateUtil.getJavaDate(numberRecord.getValue());
                    System.out.println("Date: " + date);
                }
                break;
            case LabelRecord.sid:
                // Process label cell
                LabelRecord labelRecord = (LabelRecord) record;
                break;
            case EOFRecord.sid:
                // Process end of file
                EOFRecord eofRecord = (EOFRecord) record;
                System.out.println("End parsing workbook");
                break;
        }
    }
}

要使用这个示例代码，你需要将path/to/your/excel/file.xls替换为实际的Excel文件路径。代码使用HSSFEventFactory和HSSFRequest来注册DateParser作为事件监听器，并使用processWorkbookEvents方法开始处理Excel事件。在processRecord方法中，根据不同的记录类型进行处理，如果是数值记录且被格式化为日期，使用DateUtil.getJavaDate方法获取日期值并进行处理。

请注意，这个示例仅处理了日期类型的单元格，你可能需要根据你的需要进行修改和扩展。