springboot+easypoi 導入數據

首先添加依賴

       <!--    web    -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--   lombok主要是來簡化實體類方法     -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- io常用工具類 -->
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.6</version>
        </dependency>

        <!-- 文件上傳工具類 -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.4</version>
        </dependency>

        <!--    easypoi 依賴    -->
        <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>

 

新建 EasyPoiUtils 工具類

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.pigs.springbooteasypoipigs.entity.UserEntity; import org.apache.commons.lang3.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; /** * @author PIGS * @version 1.0 * @date 2020/4/25 14:16 * @effect : * 表格數據工具類 */
public final 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); } } /** * 導入數據 * userEnity 你自己新建的實體類 實體類代碼在下面 * @param file * @param clz * @return
     */
    public static List<UserEntity> importExcel(MultipartFile file, Class<UserEntity> 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); } } }

新建一個實體類接收參數

import cn.afterturn.easypoi.excel.annotation.Excel; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; /** * @author PIGS * @version 1.0 * @date 2020/4/25 14:16 * @effect : * 用戶實體類 */ @Data @AllArgsConstructor @NoArgsConstructor public class UserEntity { @Excel(name = "用戶ID", width = 15) private Integer userId; @Excel(name = "用戶名", width = 15) private String userName; @Excel(name = "用戶性別", width = 15) private String userSex; @Excel(name = "用戶年齡", width = 15) private Integer userAge; }

 

新建一個前端控制器

 

import com.pigs.springbooteasypoipigs.entity.UserEntity; import com.pigs.springbooteasypoipigs.utils.EasyPoiUtils; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.multipart.MultipartFile; import java.io.IOException; import java.util.HashMap; import java.util.List; import java.util.Map; /** * @author PIGS * @version 1.0 * @date 2020/4/25 14:22 * @effect : * Excel 前端控制器 */ @RestController public class ExcelController { /** * 從表格插入數據 * 接收並返回前台 * * @param file * @return * @throws IOException */ @RequestMapping("/uploadExcel") public Map<String,Object> uploadExcel(@RequestParam("file") MultipartFile file) throws IOException { List<UserEntity> checkingIns = EasyPoiUtils.importExcel(file, UserEntity.class); Map<String,Object> map = new HashMap<>(); map.put("code",200); map.put("msg","ok"); map.put("data",checkingIns); return map; } }

 

新建一個html頁面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>上傳excel</title>
</head>
<body>
<h1>上傳excel文件</h1>
<form action="/uploadExcel" method="post" enctype="multipart/form-data">
    <p>文件上傳</p>
    <input type="file" name="file">
    <p><input type="submit" value="提交"></p>
</form>
</body>
</html>

 

自制幾條數據

這個字段名跟實體類  @Excel(name = "用戶ID", width = 15) 需要一致不然會接收不到參數的

 

 

 

最后提交就完事了

 

 

demo 已經上傳了 gitee了需要就去看吧

https://gitee.com/pig_farmer_x/springboot-easypoi-pigs