使用阿里EasyExcel导出大数据量的Excel文件

添加依赖

com.alibaba
easyexcel
1.1.2-beat1

最新的依赖见： https://mvnrepository.com/artifact/com.alibaba/easyexcel

工具类编写

public class EasyExcelUtil {

/**
 * Excel文件导出
 * @param response
 * @param fileName：导出Excel文件名称
 * @param sheetName：Excel的Sheet名称
 * @param headList：Excel标题名称
 * @param bodyList：Excel内容
 * @throws Exception
 */
public static void writeExcel(HttpServletResponse response, String fileName, String sheetName,
		List> headList, List> bodyList) throws Exception {
	if (null == fileName) {
		throw new Exception("文件名称不能为空！");
	}
	if (null == sheetName) {
		throw new Exception("Excel的Sheet名称不能为空！");
	}
	if (null == headList) {
		throw new Exception("文件标题不能为空！");
	}

	ExcelWriter writer = new ExcelWriter(getOutputStream(fileName, response), ExcelTypeEnum.XLSX);
	Sheet sheet1 = new Sheet(1, 1);
	sheet1.setSheetName(sheetName);
	sheet1.setTableStyle(createDefaultTableStyle());
	sheet1.setHead(headList);
	// 设置自适应宽度
	sheet1.setAutoWidth(Boolean.TRUE);
	if (null != bodyList) {
		writer.write1(bodyList, sheet1);
	}
	writer.finish();
}

/**
 * 导出文件名称定义
 * 
 * @param fileName:文件名称
 * @param response
 *            HttpServletResponse
 * @return
 * @throws Exception
 */
public static OutputStream getOutputStream(String fileName, HttpServletResponse response) throws Exception {
	try {
		fileName = URLEncoder.encode(fileName, "UTF-8");
		response.setContentType("application/vnd.ms-excel");
		response.setCharacterEncoding("utf8");
		response.setHeader("Content-Disposition", "attachment; filename=" + fileName + ".xlsx");
		response.setHeader("Pragma", "public");
		response.setHeader("Cache-Control", "no-store");
		response.addHeader("Cache-Control", "max-age=0");
		return response.getOutputStream();
	} catch (IOException e) {
		throw new Exception("导出excel表格失败!", e);
	}
}

/**
 * 设置默认的导出样式
 * 
 * @return
 */
public static TableStyle createDefaultTableStyle() {
	TableStyle tableStyle = new TableStyle();
	Font headFont = new Font();
	headFont.setBold(true);
	headFont.setFontHeightInPoints((short) 12);
	headFont.setFontName("微软雅黑");
	tableStyle.setTableHeadFont(headFont);
	tableStyle.setTableHeadBackGroundColor(IndexedColors.WHITE);

	Font contentFont = new Font();
	contentFont.setBold(false);
	contentFont.setFontHeightInPoints((short) 11);
	contentFont.setFontName("微软雅黑");
	tableStyle.setTableContentFont(contentFont);
	tableStyle.setTableContentBackGroundColor(IndexedColors.WHITE);
	return tableStyle;
}

}

controller代码编写

@RequestMapping(value="/exportexcel", method = RequestMethod.GET)
public void exportexcel(HttpServletRequest request,
HttpServletResponse response) throws Exception{

	EasyExcelUtil.writeExcel(response, "easy文件名称", "sheet名称",
			DataUtil.createTestListStringHead2(), 
			DataUtil.createTestListObject());
}

DataUtil 类为EasyExcel提供的测试代码

public class DataUtil {

public static List> createTestListObject() {
    List> object = new ArrayList>();
    for (int i = 0; i < 300000; i++) {
        List