Java 将xlsx转换为xls时出错

Java 将xlsx转换为xls时出错,java,excel,Java,Excel,我得到这个错误: Exception in thread "main" java.lang.ClassCastException: org.apache.poi.xssf.usermodel.XSSFComment cannot be cast to org.apache.poi.hssf.usermodel.HSSFComment 当我试图编译以下代码时 我使用了库POI3.11和dom4j-1.6.1和xmlbeans 2.3.0 我用EclipseLuna在mac上编译了这

我得到这个错误:

Exception in thread "main" java.lang.ClassCastException: 
  org.apache.poi.xssf.usermodel.XSSFComment cannot be cast to 
  org.apache.poi.hssf.usermodel.HSSFComment 
当我试图编译以下代码时

我使用了库
POI3.11
dom4j-1.6.1
xmlbeans 2.3.0

我用EclipseLuna在mac上编译了这段代码

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Iterator;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;


public class FormulasExcel {

    private String outFn;
    private File inpFn;

    public FormulasExcel(File inpFn){
        this.outFn = inpFn + ".xls";
        this.inpFn = inpFn;
    }

    public void xlsx2xls_progress() throws InvalidFormatException,IOException {
        InputStream in = new FileInputStream(inpFn);
        try {
            XSSFWorkbook wbIn = new XSSFWorkbook(in);
            File outF = new File(outFn);
            if (outF.exists()) {
                outF.delete();
            }

            Workbook wbOut = new HSSFWorkbook();
            int sheetCnt = wbIn.getNumberOfSheets();
            for (int i = 0; i < sheetCnt; i++) {
                Sheet sIn = wbIn.getSheetAt(0);
                Sheet sOut = wbOut.createSheet(sIn.getSheetName());
                Iterator<Row> rowIt = sIn.rowIterator();
                while (rowIt.hasNext()) {
                    Row rowIn = rowIt.next();
                    Row rowOut = sOut.createRow(rowIn.getRowNum());

                    Iterator<Cell> cellIt = rowIn.cellIterator();
                    while (cellIt.hasNext()) {
                        Cell cellIn = cellIt.next();
                        Cell cellOut = rowOut.createCell(cellIn.getColumnIndex(), cellIn.getCellType());

                        switch (cellIn.getCellType()) {
                        case Cell.CELL_TYPE_BLANK: break;

                        case Cell.CELL_TYPE_BOOLEAN:
                            cellOut.setCellValue(cellIn.getBooleanCellValue());
                            break;

                        case Cell.CELL_TYPE_ERROR:
                            cellOut.setCellValue(cellIn.getErrorCellValue());
                            break;

                        case Cell.CELL_TYPE_FORMULA:
                            cellOut.setCellFormula(cellIn.getCellFormula());
                            break;

                        case Cell.CELL_TYPE_NUMERIC:
                            cellOut.setCellValue(cellIn.getNumericCellValue());
                            break;

                        case Cell.CELL_TYPE_STRING:
                            cellOut.setCellValue(cellIn.getStringCellValue());
                            break;
                        }

                        {
                            CellStyle styleIn = cellIn.getCellStyle();
                            CellStyle styleOut = cellOut.getCellStyle();
                            styleOut.setDataFormat(styleIn.getDataFormat());
                        }cellOut.setCellComment(cellIn.getCellComment());

                        }
                }
            }
            OutputStream out = new BufferedOutputStream(new FileOutputStream(outF));
            try {
                wbOut.write(out);
            } finally {
                out.close();
            }
        } finally {
            in.close();
        }
    }

    public static void main(String[] args) throws InvalidFormatException, IOException{

        FormulasExcel doit = new FormulasExcel(new File("/Users/Downloads/Layout.xlsx"));
        doit.xlsx2xls_progress();
    }

} 
import java.io.BufferedOutputStream;
导入java.io.File;
导入java.io.FileInputStream;
导入java.io.FileOutputStream;
导入java.io.IOException;
导入java.io.InputStream;
导入java.io.OutputStream;
导入java.util.Iterator;
导入org.apache.poi.hssf.usermodel.HSSFWorkbook;
导入org.apache.poi.openxml4j.exceptions.InvalidFormatException;
导入org.apache.poi.ss.usermodel.Cell;
导入org.apache.poi.ss.usermodel.CellStyle;
导入org.apache.poi.ss.usermodel.Row;
导入org.apache.poi.ss.usermodel.Sheet;
导入org.apache.poi.ss.usermodel.工作簿;
导入org.apache.poi.xssf.usermodel.xssf工作簿;
公共类公式{
私有字符串输出;
私有文件inpFn;
公共公式SEXCEL(文件inpFn){
this.outFn=inpFn+“.xls”;
this.inpFn=inpFn;
}
public void xlsx2xls_progress()引发InvalidFormatException,IOException{
InputStream in=新文件InputStream(inpFn);
试一试{
XSSF工作簿wbIn=新XSSF工作簿(in);
文件输出=新文件(输出);
如果(outp.exists()){
删除();
}
工作簿wbOut=新的HSSF工作簿();
int sheetCnt=wbIn.getNumberOfSheets();
对于(int i=0;i
您是否可以包括导致错误的堆栈跟踪?基本上,这个错误告诉您试图以不允许的方式将一个类强制转换为另一个类。但是这样做的原因可能很多。另外,您是否尝试过使用不同的文件作为输入?这可能取决于文件中的意外输入数据。生成异常的是哪一行?Stacktrace:线程“main”java.lang.ClassCastException中的异常:org.apache.poi.xssf.usermodel.XSSFComment无法强制转换为org.apache.poi.hssf.usermodel.HSSFComment(HSSFCell.java:1018)在FormulasExcel.xlsx2xls_progress(FormulasExcel.java:82)在FormulasExcel.main(FormulasExcel.java:101)和您的第82行是???