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JXL WritableWorkbook在write数组越界异常

    博客分类:
  • BUG
 
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参考文章:http://www.xuebuyuan.com/791774.html (感谢)

 

问题描述:

        在修改别人的代码时遇到用jxl 读取生成的excel模板,在读取过程中一切正常,但在写入新的EXCEL时调用.write()方法出现下标越界异常,跟着读取数据未发现问题,抛出异常显示未jxl引用包中相关,查询资料,发现这篇文章作者描述的情况及出现的问题与本人相似90%;Excel模板版本是office2007,具体模板的生成制作时的版本不清楚,模板中内容格式设置也不清楚的情况下,我的异常显示FormattingRecords.class这个类 rationalize方法中,根据参考文章中作者描述的方法,在相关代码处捕获异常,跳出循环后,代码执行正常。遇到类似问题的同学,可尝试参考修改,将jxl包中出现异常位置反编译跟踪修改。

 

部分代码:(红色为修改代码)

 public IndexMapping rationalize(IndexMapping fontMapping, IndexMapping formatMapping)
  {
    XFRecord xfr = null;
    for (Iterator it = this.xfRecords.iterator(); it.hasNext(); )
    {
      xfr = (XFRecord)it.next();

      if (xfr.getFormatRecord() >= 164)
      {
        xfr.setFormatIndex(formatMapping.getNewIndex(xfr.getFormatRecord()));
      }

      xfr.setFontIndex(fontMapping.getNewIndex(xfr.getFontIndex()));
    }

    ArrayList newrecords = new ArrayList(21);
    IndexMapping mapping = new IndexMapping(this.xfRecords.size());
    int numremoved = 0;

    int numXFRecords = Math.min(21, this.xfRecords.size());

    for (int i = 0; i < numXFRecords; i++)
    {
      newrecords.add(this.xfRecords.get(i));
      mapping.setMapping(i, i);
    }

    if (numXFRecords < 21)
    {
      logger.warn("There are less than the expected minimum number of XF records");

      return mapping;
    }

    for (int i = 21; i < this.xfRecords.size(); i++)
    {
      XFRecord xf = (XFRecord)this.xfRecords.get(i);

      boolean duplicate = false;
      Iterator it = newrecords.iterator();
      while ((it.hasNext()) && (!
        duplicate))
      {
        XFRecord xf2 = (XFRecord)it.next();
        if (xf2.equals(xf))
        {
          duplicate = true;
          mapping.setMapping(i, mapping.getNewIndex(xf2.getXFIndex()));
          numremoved++;
        }

      }

      if (!duplicate)
      {
        newrecords.add(xf);
        mapping.setMapping(i, i - numremoved);
      }

    }

    for (Iterator i = this.xfRecords.iterator(); i.hasNext(); ) {
      try
      {
        XFRecord xf = (XFRecord)i.next();
        xf.rationalize(mapping);
      } catch (Exception e) {
        break;
      }
    }

    this.xfRecords = newrecords;

    return mapping;
  }

  

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