Java import and export excel, simply use the easypoi

Based spring boot framework, the first configuration pom

  <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-base</artifactId>
            <version>4.0.0</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-web</artifactId>
            <version>4.0.0</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-annotation</artifactId>
            <version>4.0.0</version>
        </dependency>

 

Entity class

package com.vo;


import cn.afterturn.easypoi.excel.annotation.Excel;
import com.baomidou.mybatisplus.annotation.TableName;
import com.common.data.entity.CurdEntity;


@TableName("wx_user")
public class User extends CurdEntity {
    @Excel(name = "姓名")
    String name;
    @Excel(name = "用户")
    String user;
    @Excel(name = "年龄")
    int groupValue;

    public int getGroupValue() {
        return groupValue;
    }

    public void setGroupValue(int groupValue) {
        this.groupValue = groupValue;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getUser() {
        return user;
    }

    public void setUser(String user) {
        this.user = user;
    }
}

 

General Method in class

package com.common.util;

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 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;
import java.util.NoSuchElementException;

/**
 * @Description: 表格工具类
 */
public class PoiUtils {
    public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, boolean isCreateHeader, HttpServletResponse response) {
        ExportParams exportParams = new ExportParams(title, sheetName);
        exportParams.setCreateHeadRows(isCreateHeader);
        defaultExport(list, pojoClass, fileName, response, exportParams);

    }

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

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

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

    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.getMessage());
        }
    }

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

    /**
     * 导入
     * @param filePath
     * @param titleRows
     * @param headerRows
     * @param pojoClass
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass) {
        if (StringUtils.isBlank(filePath)) {
            return null;
        }
        ImportParams params = new ImportParams();
        params.setTitleRows(titleRows);
        params.setHeadRows(headerRows);
        List<T> list = null;
        try {
            list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
        } catch (NoSuchElementException e) {
            throw new RuntimeException("模板不能为空");
        } catch (Exception e) {
            e.printStackTrace();
            throw new RuntimeException(e.getMessage());
        }
        return list;
    }

    /**
     * 导入表格
     * @param file
     * @param pojoClass
     * @param <T>
     * @return
     */
    public static <T> List<T> importExcel(MultipartFile file, Class<T> pojoClass) {
        if (file == null) {
            return null;
        }
        ImportParams params = new ImportParams();
        try {
            List<T> list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
            return list;
        } catch (NoSuchElementException e) {
            throw newRuntimeException ( "excel file can not empty" ); 
        } the catch (Exception E) {
             the throw  new new a RuntimeException (e.getMessage ()); 
        } 
    } 
}

 

 

Interface calls related methods, show you where import feature

@PostMapping ( "excelList") // batch save, a save fails, all the data is rolled back, to test whether the transaction become effective 
    public MsgDataBody excelList (MultipartFile File) { 
        MsgDataBody <List <>> msgBody the User = new new MsgDataBody (); 
        msgBody.setCode (Constant.Error.getCode ()); 
        msgBody.setMsg ( "import failed" );
         the try { 
           List <the User> PoiUtils.importExcel userList = (. File, the User class );
            / * 
           * associated import 
           * * / 
           msgBody. the setData (userList); 
            msgBody.setCode (Constant.Success.getCode ()); 
            msgBody.setMsg ("Import failed" ); 
        } the catch (Exception E) { 
            msgBody.setMsg ( "Import failed [" e.getMessage + () + "]" ); 
        } 
        return msgBody; 
    }

 

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