Java——使用EasyExcel导出动态列的Excel_easyexcel 动态列

前言

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有些时候列表的列可能是动态的，需要根据动态表头导出Excel文件，这时候可以使用下面的方法解决：

    /**
     * 使用EasyExcel导出动态Excel
     * @param includeColumnFiledNames
     * @param fileName
     * @param list
     * @param clazz
     * @param response
     */
    public static void exportDynamicExcel(Set<String> includeColumnFiledNames, String fileName, List list, Class clazz, HttpServletResponse response) {
        try {
            ServletOutputStream os = response.getOutputStream();
            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
            response.setCharacterEncoding("utf-8");
            String encodeFileName = new String(fileName.getBytes(), "ISO8859-1");
            response.setContentType("application/octet-stream;charset=UTF-8");
            response.setHeader("Content-Disposition", "attachment;filename=" + encodeFileName + ".xlsx");
 
            ExcelWriterBuilder excelBuilder = EasyExcel.write(os, clazz);
            excelBuilder = includeColumnFiledName(includeColumnFiledNames, excelBuilder);
            excelBuilder.useDefaultStyle(false).sheet(fileName).doWrite(list);
            os.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 
    private static ExcelWriterBuilder includeColumnFiledName(Set<String> includeColumnFiledNames, ExcelWriterBuilder excelBuilder) {
        excelBuilder = excelBuilder.registerWriteHandler(new LongestMatchColumnWidthStyleStrategy());
        if (includeColumnFiledNames.size() > 0) {
            excelBuilder = excelBuilder.includeColumnFiledNames(includeColumnFiledNames);
        }
        excelBuilder = excelBuilder.registerWriteHandler(new LongestMatchColumnWidthStyleStrategy());
        return excelBuilder;
    }

扩展

静态列导出代码：

    /**
     * 使用EasyExcel导出Excel
     */
    public static void exportExcel(String fileName, List list, Class clazz, HttpServletResponse response) {
        try {
            String fileNameFull = fileName + "(" + TimeUtils.getTime() + ")";
            ServletOutputStream os = response.getOutputStream();
            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
            response.setCharacterEncoding("utf-8");
            String encodeFileName = URLEncoder.encode(fileNameFull, "UTF-8");
            response.setContentType("application/octet-stream;charset=UTF-8");
            response.setHeader("Content-Disposition", "attachment;filename=" + encodeFileName + ".xlsx");
            EasyExcel.write(os, clazz).useDefaultStyle(false).sheet(fileName).doWrite(list);
            os.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }