使用fill(Object....)接口出现的空指针问题

[Tomcat-8]

触发场景描述

直接产生异常处：

对应的调用报错栈 java.lang.NullPointerException at com.alibaba.excel.write.style.row.AbstractRowHeightStyleStrategy.afterRowDispose(AbstractRowHeightStyleStrategy.java:22) at com.alibaba.excel.write.handler.chain.RowHandlerExecutionChain.afterRowDispose(RowHandlerExecutionChain.java:47) at com.alibaba.excel.util.WriteHandlerUtils.afterRowDispose(WriteHandlerUtils.java:178) at com.alibaba.excel.write.executor.ExcelWriteFillExecutor.doFill(ExcelWriteFillExecutor.java:297) at com.alibaba.excel.write.executor.ExcelWriteFillExecutor.fill(ExcelWriteFillExecutor.java:130) at com.alibaba.excel.write.ExcelBuilderImpl.fill(ExcelBuilderImpl.java:82) at com.alibaba.excel.ExcelWriter.fill(ExcelWriter.java:110) at com.alibaba.excel.ExcelWriter.fill(ExcelWriter.java:98)

图示：

触发Bug的代码

   @Test
    public void testDemo() {

        WriteSheet writeSheet = EasyExcelFactory.writerSheet("Sheet1").build();
        ExcelWriter excelWriter = EasyExcel.write(fileName)
                // 加入拦截就会出现问题
                .registerWriteHandler(new CustomCellWriteHeightConfig())
                .withTemplate(testTemplate)
                .build();

        // 这里 会填充到第一个sheet， 然后文件流会自动关闭
        FillData fillData = new FillData();
        fillData.setName("张三");
        fillData.setNumber(5.2);

        excelWriter.fill(fillData,writeSheet);
        excelWriter.finish();
    }

个人想法

doFill(readTemplateData(templateAnalysisCache), realData, fillConfig, null);

RowWriteHandlerContext rowWriteHandlerContext = WriteHandlerUtils.createRowWriteHandlerContext(writeContext, null, relativeRowIndex, Boolean.FALSE);

并且其中的relativeRowIndex 和 head 属性都是上下文固定传入的，在AbstractRowHeightStyleStrategy类中的方法 setHeadColumnHeight和setContentColumnHeight

if (context.getHead()) { setHeadColumnHeight(context.getRow(), context.getRelativeRowIndex()); } else { setContentColumnHeight(context.getRow(), context.getRelativeRowIndex()); }

用的是基类int接收参数null是不允许的。

考虑是否能换成包装类型接收，若有不能空的逻辑则再做判空处理。

[HunterLomo]

这个bug到现在没修复吗？遇到同样问题了

[Xinboy]

同样的问题，使用doFill()出现，更新至 4.0.2仍然存在，这是我的报错：

java.lang.NullPointerException: Cannot invoke "java.lang.Integer.intValue()" because the return value of "com.alibaba.excel.write.handler.context.RowWriteHandlerContext.getRelativeRowIndex()" is null
    at com.alibaba.excel.write.style.row.AbstractRowHeightStyleStrategy.afterRowDispose(AbstractRowHeightStyleStrategy.java:22)