07版本的word不能导入

package org.imooc.service;
import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.usermodel.XWPFParagraph;
import org.imooc.dto.ImportWordParamDto;
import org.imooc.dto.ImportWordResultDto;
import java.io.IOException;
import java.util.List;

public class WordService {
    public ImportWordResultDto imp(ImportWordParamDto dto){
        ImportWordResultDto result = new ImportWordResultDto();
        result.setTitle(dto.getTitle());
        HWPFDocument doc = null;
        try {
             doc = new HWPFDocument(dto.getWord().getInputStream());
             result.setContent(doc.getDocumentText().replace("\r","<br />"));
        }catch (IllegalArgumentException e){
            System.out.println("这可能是一个07版本的word!");
        } catch (Exception e) {
            result.setMsg("这可能不是一个Word!");
            return result;
        }finally {
            if (doc != null) {
                try {
                    doc.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        XWPFDocument docx = null;
        try {
            docx = new XWPFDocument(dto.getWord().getInputStream());
            List<XWPFParagraph> paragraphList = docx.getParagraphs();
            StringBuilder content = new StringBuilder();
            for (int i = 0;i < paragraphList.size();i++) {
                if (i != 0){
                    content.append("<br />");
                }
                content.append(paragraphList.get(i).getText());
            }
            result.setContent(content.toString());
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if (docx != null) {
                try {
                    docx.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return result;
    }
}