ali Excel 的导出

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>easyexcel</artifactId>
    <version>1.1.2-beta5</version>
</dependency>

@ExcelProperty(value = "列名",index = 列的索引)

实体类要继承 BaseRowModel 类

List<实体类>  list= 获取要导出的数据集合。
Sheet sheet = new Sheet(1,0,实体类.class); //定义一个sheet 

try {
    response.setHeader("Access-Control-Expose-Headers","Content-disposition");     
    response.setHeader("Content-disposition","attachment;filename=" + URLEncoder.encode(sheetName,"utf-8") + ".xlsx");
    OutputStream out = response.getOutputStream();
    ExcelWriter writer = EasyExcelFactory.getWriter(out); //
    sheet.setSheetName(sheetName);　　//设置sheet的名字
    writer.write(list,sheet);　　　　　//把list集合中的数据写入到sheet上面
    writer.finish();
} catch (IOException e) {
    logger.info("导出表格出现问题" + e.getMessage());
}