easyexcel导出Excel表格
easyexcel相比较poi不是一套成熟的框架，但是开发快捷方便，不耗内存，速度快，是alibaba的开源框架，用起来十分简单：
整个excel表是一个workbook，下面有多个sheet，一个sheet有多行row，一行有多个cell
效果
第一步 引入maven依赖
com.alibaba
easyexcel
1.1.1
非正式版本目前更新有1.1.5beat版，生产中还是选正式版1.1.1，api 没有那么丰富。
第二步 封装对应实体
a、 需要继承BaseRowModel类，此类map字段可以自定义excel样式
@Data
public class UserVO extends BaseRowModel implements Serializable {
@ExcelProperty(value = "姓名", index = 0)
private String name;
@ExcelProperty(value = "昵称", index = 1)
private String nickName;
@ExcelProperty(value = "幸运数字", index = 2)
private String password;
@ExcelProperty(value = "生日", index = 3, format = "yyyy/MM/dd")
private Date birthday;
}
index 代表第几列，value表头
========================================================
b、封装一个sheet表数据对应实体：
@Data
public class MultipleSheelPropety implements Serializable {
private List data;
private Sheet sheet;
}
data字段 为sheet表数据，一行一行的，sheet 字段可以设置顺序，名字等
========================================================
c 、编写excel工具类
@Slf4j
public class ExcelUtil {
private static Sheet initSheet;
/**
* 如果 sheet为空，默认创建一个
*/
static {
initSheet = new Sheet(1, 0);
initSheet.setSheetName("mysheet");
initSheet.setAutoWidth(Boolean.TRUE);
}
/**
* 生成多Sheet的excle
*
* @param response response
* @param multipleSheelPropetys multipleSheelPropetys
*/
public static void writeWithMultipleSheel(HttpServletResponse response, List multipleSheelPropetys) {
if (CollectionUtils.isEmpty(multipleSheelPropetys)) {
log.error("export data is null");
return;
}
OutputStream outputStream = null;
ExcelWriter writer = null;
try {
outputStream = response.getOutputStream();
writer = new ExcelWriter(outputStream, ExcelTypeEnum.XLSX, true);
for (MultipleSheelPropety multipleSheelPropety : multipleSheelPropetys) {
Sheet sheet = multipleSheelPropety.getSheet() != null ? multipleSheelPropety.getSheet() : initSheet;
if (!CollectionUtils.isEmpty(multipleSheelPropety.getData())) {
sheet.setClazz(multipleSheelPropety.getData().get(0).getClass());
}
writer.write(multipleSheelPropety.getData(), sheet);
}
} catch (IOException e) {
log.error("error la");
} finally {
try {
Objects.requireNonNull(writer).finish();
Objects.requireNonNull(outputStream).close();
} catch (IOException e) {
log.error("excel文件导出失败, 失败原因：{}", e);
}
}
}
}
编写controller，service
controller：
@RestController
public class ExcelController {
@Autowired
private ExcelService excelService;
@RequestMapping(value = "/export", method = RequestMethod.GET)
public void export(HttpServletResponse response){
excelService.export(response);
}
}
service：
public interface ExcelService {
/**
* export
*
* @param response res
*/
void export(HttpServletResponse response);
}
@Service
public class ExcelServiceImpl implements ExcelService {
@Autowired
private UserMapper userMapper;
@Override
public void export(HttpServletResponse response) {
List list = getExportData();
response.setCharacterEncoding("utf-8");
response.setContentType("application/vnd.ms-excel;charset=utf-8");
try {
response.setHeader("Content-Disposition", "attachment;filename=" + new String(("test.xlsx").getBytes(), "ISO8859-1"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
ExcelUtil.writeWithMultipleSheel(response, list);
}
private List getExportData() {
List list = Lists.newArrayList();
List allUser = userMapper.getAllUser();
MultipleSheelPropety multipleSheelPropety = new MultipleSheelPropety();
multipleSheelPropety.setData(allUser);
Sheet sheet = new Sheet(1, 0);
sheet.setSheetName("sheet1");
multipleSheelPropety.setSheet(sheet);
list.add(multipleSheelPropety);
MultipleSheelPropety multipleSheelPropety1 = new MultipleSheelPropety();
Sheet sheet1 = new Sheet(2, 0);
sheet1.setSheetName("sheet2");
multipleSheelPropety1.setSheet(sheet1);
multipleSheelPropety1.setData(allUser);
list.add(multipleSheelPropety1);
return list;
}
}
数据随意填写