springboot利用easypoi导出excle

第一步

导入jar包，添加maven依赖

dependency>
    <groupId>cn.afterturn</groupId>
    <artifactId>easypoi-base</artifactId>
    <version>3.2.0</version>
</dependency>
<dependency>
    <groupId>cn.afterturn</groupId>
    <artifactId>easypoi-web</artifactId>
    <version>3.2.0</version>
</dependency>
<dependency>
    <groupId>cn.afterturn</groupId>
    <artifactId>easypoi-annotation</artifactId>
    <version>3.2.0</version>
</dependency>

第二步

自定义工具类
复制就完了

import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import com.guangda.moblieXD.backmanage.po.TGdFeedback;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;

public class EasyPoiUtils {
    private EasyPoiUtils() {}

    private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
        try {
            response.setCharacterEncoding("UTF-8");
            response.setHeader("content-Type", "application/vnd.ms-excel");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
            workbook.write(response.getOutputStream());
        } catch (IOException e) {
            throw new  RuntimeException(e);
        }
    }

    private static<T> void defaultExport(List<T> dataList, Class<?> clz, String fileName, HttpServletResponse response, ExportParams exportParams) {
        Workbook workbook = ExcelExportUtil.exportExcel(exportParams, clz, dataList);
        if (workbook != null) {
            downLoadExcel(fileName, response, workbook);
        }
    }

    public static<T> void exportExcel(List<T> dataList, String title, String sheetName, Class<?> clz, String fileName, boolean isCreateHeader, HttpServletResponse response) {
        ExportParams exportParams = new ExportParams(title, sheetName);
        exportParams.setCreateHeadRows(isCreateHeader);
        defaultExport(dataList, clz, fileName, response, exportParams);
    }

    public static<T> void exportExcel(List<T> dataList, String title, String sheetName, Class<?> clz, String fileName, HttpServletResponse response) {
        defaultExport(dataList, clz, fileName, response, new ExportParams(title, sheetName));
    }

    private static void defaultExport(List<Map<String, Object>> dataList, String fileName, HttpServletResponse response) {
        Workbook workbook = ExcelExportUtil.exportExcel(dataList, ExcelType.HSSF);
        if (workbook != null) {
            downLoadExcel(fileName, response, workbook);
        }
    }

    public static void exportExcel(List<Map<String, Object>> dataList, String fileName, HttpServletResponse response) {
        defaultExport(dataList, fileName, response);
    }

    public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> clz) {
        if (StringUtils.isBlank(filePath)) {
            return null;
        }

        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);

        try {
            return ExcelImportUtil.importExcel(new File(filePath), clz, params);
        } catch (Exception e) {
            throw new RuntimeException(e.getMessage());
        }
    }

    public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> clz) {
        if (file == null) {
            return null;
        }

        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);

        try {
            return ExcelImportUtil.importExcel(file.getInputStream(), clz, params);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public static List<TGdFeedback> importExcel(MultipartFile file, Class<TGdFeedback> clz) {
        if (file == null) {
            return null;
        }

        ImportParams params = new ImportParams();
        params.setTitleRows(0);
        params.setHeadRows(1);
        try {
            return ExcelImportUtil.importExcel(file.getInputStream(), clz, params);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}

第三步

写实体类，给想要的输出的列添加注解
注意注解的包的路径

 import cn.afterturn.easypoi.excel.annotation.Excel;

 public class ExportUser {
    @Excel(name = "用户名", width = 10)
    private String username;

    @Excel(name = "创建时间", format = "yyyy-MM-dd", width = 15)
    private Date createTime;
}

第四步

导入

@RequestMapping("/import/users")
@ResponseBody
public List<ExportUser> importUsers(@RequestParam MultipartFile file) {
    return EasyPoiUtils.importExcel(file, ExportUser.class);
}

导出

@RequestMapping(value = "/export/users", method = RequestMethod.GET)
public void exportUsers(HttpServletResponse response) {
    List<ExportUser> userList = getUserList();
    EasyPoiUtils.exportExcel(userList, "用户列表", "用户报表", ExportUser.class, "用户明细报表.xls", response);
}

本文在原基础上进行了一点添加说明，原文转载地址已贴
原文链接：https://blog.csdn.net/u013219624/article/details/83313977