java -springboot 操作 excel文档 easyexcel库 (上传，下载，导出)

 2、java操作 excel

https://blog.csdn.net/lzp492782442/article/details/106860383/

The supplied data appears to be in the Office 2007+ XML

https://blog.csdn.net/you23hai45/article/details/70196897

关键问题的原因还是excel2003和excel2007版本的问题
3、解决办法

（1）判断文件后缀名是xls，还是xlsx

（2）如果是xls，使用HSSFWorkbook；如果是xlsx，使用XSSFWorkbook

 

 

 

 

 

项目集成

使用idea开发工具简单创建了一个easyexcel-demo项目，加入了web模块以及easyexcel maven依赖，依赖如下：

<!-- https://mvnrepository.com/artifact/com.alibaba/easyexcel -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>easyexcel</artifactId>
    <version>2.2.4</version>
</dependency>

 

创建模版 放到 excelTemplate目录下

 

 

 

 

定义模型映射对象 UserExcelModel

import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.metadata.BaseRowModel;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;


@NoArgsConstructor
@AllArgsConstructor
@Data
public class UserExcelModel  extends BaseRowModel implements Serializable {

    @ExcelProperty(value = "用户名", index = 0)
    private String name;

    @ExcelProperty(value = "年龄", index = 1)
    private Integer age;

    @ExcelProperty(value = "手机号", index = 2)
    private String mobile;

    @ExcelProperty(value = "性别", index = 3)
    private String sex;
}

　　

监听类 

package com.control;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import lombok.extern.slf4j.Slf4j;

import java.util.ArrayList;
import java.util.List;

@Slf4j
public class ModelExcelListener extends AnalysisEventListener {
    private List<Object> datas = new ArrayList<>();
    /**
     * 通过 AnalysisContext 对象还可以获取当前 sheet，当前行等数据
     */
    @Override
    public void invoke(Object data, AnalysisContext context) {
        //数据存储到list，供批量处理，或后续自己业务逻辑处理。
        log.info("读取到数据{}",data);
        datas.add(data);
        //根据业务自行处理，可以写入数据库等等
    }

    //所以的数据解析完了调用
    @Override
    public void doAfterAllAnalysed(AnalysisContext context) {
        log.info("所有数据解析完成");
    }
}

　　

控制层

其中 HttpServletResponse response 如果这个导出excel的方法封装成方法被调用，那么control的方法也要传HttpServletResponse response过来------踩坑！！！！

    /**
     * 下载模板
     */
    @GetMapping("/downloadTemplate")
    public void downloadTemplate(HttpServletResponse response) throws Exception {
        ClassPathResource classPathResource = new ClassPathResource("excelTemplate/easyexcel.xlsx");
        InputStream inputStream = classPathResource.getInputStream();
        Workbook workbook = new XSSFWorkbook(inputStream);
        response.setContentType("application/vnd.ms-excel");
        response.setHeader("content-Disposition", "attachment;filename=" + URLEncoder.encode("easyexcel2222.xlsx", "utf-8"));
        response.setHeader("Access-Control-Expose-Headers", "content-Disposition");
        OutputStream outputStream = response.getOutputStream();
        workbook.write(outputStream);
        outputStream.flush();
        outputStream.close();
    }

    /**
     * 导出数据
     */
    @GetMapping("/exportData")
    public void exportData(HttpServletResponse response) throws Exception {

        XSSFWorkbook workbook = new XSSFWorkbook();

//        设置列名
        String[] columnNames = {"用户名", "年龄", "手机号", "性别"};

//     设置tab
        Sheet sheet1 = workbook.createSheet("第一个tab");
        Sheet sheet = workbook.createSheet("第二个tab");

        //设置字体样式
        Font titleFont = workbook.createFont();
        titleFont.setFontName("simsun");
        titleFont.setBold(true);
        titleFont.setColor(IndexedColors.BLACK.index);
        XSSFCellStyle titleStyle = workbook.createCellStyle();
        titleStyle.setAlignment(HorizontalAlignment.CENTER);
        titleStyle.setVerticalAlignment(VerticalAlignment.CENTER);
        titleStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        titleStyle.setFillForegroundColor(IndexedColors.YELLOW.index);
        titleStyle.setFont(titleFont);

//        操作第x行开始
        Row titleRow = sheet.createRow(0);

        for (int i = 0; i < columnNames.length; i++) {
//            写入几行第几列
            Cell cell = titleRow.createCell(i);
//            写入的内容
            cell.setCellValue(columnNames[i]);
//            写入的格式
            cell.setCellStyle(titleStyle);
        }

        //模拟构造数据
        List<UserExcelModel> dataList = new ArrayList<>();
        dataList.add(new UserExcelModel("张三", 12, "13867098765", "男"));
        dataList.add(new UserExcelModel("张三1", 12, "13867098765", "男"));
        dataList.add(new UserExcelModel("张三2", 12, "13867098765", "男"));
        dataList.add(new UserExcelModel("张三3", 12, "13867098765", "男"));

        //创建数据行并写入值
        for (int j = 0; j < dataList.size(); j++) {
            UserExcelModel userExcelModel = dataList.get(j);
//            获取tab表里面有多少行数据
            int lastRowNum = sheet.getLastRowNum();

//            指定写入的行
            Row dataRow = sheet.createRow(lastRowNum + 1);
//            指定第写入第几列
            dataRow.createCell(0).setCellValue(userExcelModel.getName());
            dataRow.createCell(1).setCellValue(userExcelModel.getAge());
            dataRow.createCell(2).setCellValue(userExcelModel.getMobile());
            dataRow.createCell(3).setCellValue(userExcelModel.getSex());
        }
        response.setContentType("application/vnd.ms-excel");
        response.setHeader("content-Disposition", "attachment;filename=" + URLEncoder.encode("easyexcel4444.xls", "utf-8"));
        response.setHeader("Access-Control-Expose-Headers", "content-Disposition");
        OutputStream outputStream = response.getOutputStream();
        workbook.write(outputStream);
        outputStream.flush();
        outputStream.close();
    }

//    上传
    @PostMapping("/readExcel")
    public List<UserExcelModel> readExcel(@RequestParam("file") MultipartFile file){
        List<UserExcelModel> list = new ArrayList<>();
        try {
            list = EasyExcel.read(file.getInputStream(),UserExcelModel.class,new ModelExcelListener()).sheet().doReadSync();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return list;
    }    /**
     * 下载模板
     */
    @GetMapping("/downloadTemplate")
    public void downloadTemplate(HttpServletResponse response) throws Exception {
        ClassPathResource classPathResource = new ClassPathResource("excelTemplate/easyexcel.xlsx");
        InputStream inputStream = classPathResource.getInputStream();
        Workbook workbook = new XSSFWorkbook(inputStream);
        response.setContentType("application/vnd.ms-excel");
        response.setHeader("content-Disposition", "attachment;filename=" + URLEncoder.encode("easyexcel2222.xlsx", "utf-8"));
        response.setHeader("Access-Control-Expose-Headers", "content-Disposition");
        OutputStream outputStream = response.getOutputStream();
        workbook.write(outputStream);
        outputStream.flush();
        outputStream.close();
    }

    /**
     * 导出数据
     */
    @GetMapping("/exportData")
    public void exportData(HttpServletResponse response) throws Exception {

        XSSFWorkbook workbook = new XSSFWorkbook();

//        设置列名
        String[] columnNames = {"用户名", "年龄", "手机号", "性别"};

//     设置tab
        Sheet sheet1 = workbook.createSheet("第一个tab");
        Sheet sheet = workbook.createSheet("第二个tab");

        //设置字体样式
        Font titleFont = workbook.createFont();
        titleFont.setFontName("simsun");
        titleFont.setBold(true);
        titleFont.setColor(IndexedColors.BLACK.index);
        XSSFCellStyle titleStyle = workbook.createCellStyle();
        titleStyle.setAlignment(HorizontalAlignment.CENTER);
        titleStyle.setVerticalAlignment(VerticalAlignment.CENTER);
        titleStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
        titleStyle.setFillForegroundColor(IndexedColors.YELLOW.index);
        titleStyle.setFont(titleFont);

//        操作第x行开始
        Row titleRow = sheet.createRow(0);

        for (int i = 0; i < columnNames.length; i++) {
//            写入几行第几列
            Cell cell = titleRow.createCell(i);
//            写入的内容
            cell.setCellValue(columnNames[i]);
//            写入的格式
            cell.setCellStyle(titleStyle);
        }

        //模拟构造数据
        List<UserExcelModel> dataList = new ArrayList<>();
        dataList.add(new UserExcelModel("张三", 12, "13867098765", "男"));
        dataList.add(new UserExcelModel("张三1", 12, "13867098765", "男"));
        dataList.add(new UserExcelModel("张三2", 12, "13867098765", "男"));
        dataList.add(new UserExcelModel("张三3", 12, "13867098765", "男"));

        //创建数据行并写入值
        for (int j = 0; j < dataList.size(); j++) {
            UserExcelModel userExcelModel = dataList.get(j);
//            获取tab表里面有多少行数据
            int lastRowNum = sheet.getLastRowNum();

//            指定写入的行
            Row dataRow = sheet.createRow(lastRowNum + 1);
//            指定第写入第几列
            dataRow.createCell(0).setCellValue(userExcelModel.getName());
            dataRow.createCell(1).setCellValue(userExcelModel.getAge());
            dataRow.createCell(2).setCellValue(userExcelModel.getMobile());
            dataRow.createCell(3).setCellValue(userExcelModel.getSex());
        }
        response.setContentType("application/vnd.ms-excel");
        response.setHeader("content-Disposition", "attachment;filename=" + URLEncoder.encode("easyexcel4444.xls", "utf-8"));
        response.setHeader("Access-Control-Expose-Headers", "content-Disposition");
        OutputStream outputStream = response.getOutputStream();
        workbook.write(outputStream);
        outputStream.flush();
        outputStream.close();
    }

//    上传
    @PostMapping("/readExcel")
    public List<UserExcelModel> readExcel(@RequestParam("file") MultipartFile file){
        List<UserExcelModel> list = new ArrayList<>();
        try {
            list = EasyExcel.read(file.getInputStream(),UserExcelModel.class,new ModelExcelListener()).sheet().doReadSync();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return list;
    }

　　

 

 

本地操作记录

 

ModelExcelListener.java  （做了一下修改，让他展示成json）

package com.control;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.fastjson.JSONArray;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;

import java.util.ArrayList;
import java.util.List;

@Slf4j
@Data
public class ModelExcelListener extends AnalysisEventListener {
    private List<Object> datas = new ArrayList<>();
    /**
     * 通过 AnalysisContext 对象还可以获取当前 sheet，当前行等数据
     */
    @Override
    public void invoke(Object data, AnalysisContext context) {
        //数据存储到list，供批量处理，或后续自己业务逻辑处理。
//        log.info("读取到数据{}",data);
        String data2= JSONArray.toJSONString(data);
        datas.add(data2);
        log.info("读取到数据1111{}",datas);
        //根据业务自行处理，可以写入数据库等等
    }

    //所以的数据解析完了调用
    @Override
    public void doAfterAllAnalysed(AnalysisContext context) {
        log.info("所有数据解析完成");
    }
}

 

其他的和上面的一致

控制层

读取本地的数据

//    数据读取
    @GetMapping("/excel")
    public void excel(){
        String fileName ="/Users/lucax/Desktop/工作/小工具脚本/B端测试平台/代码存档/easyexcel.xlsx";
        // 这里 需要指定读用哪个class去读，然后读取第一个sheet 文件流会自动关闭
        ModelExcelListener ModelExcelListener=new ModelExcelListener();
        EasyExcel.read(fileName, UserExcelModel.class, ModelExcelListener).sheet(0).doRead();
//      这里就拿到excel的数据了
        List aa=ModelExcelListener.getDatas();
        log.info(String.valueOf(aa));
    }

 

 

官网操作 https://www.yuque.com/easyexcel/doc/easyexcel

 

 

前端vue下载记录:  https://www.cnblogs.com/kaibindirver/p/15797386.html 

有空试试，可能在后端加上 responseType: 'arraybuffer' 的话前端估计久不用加，也能导出