excel导入，错误数据excel导出

要实现功能，非空校验，如果为空则下载错误excel，说明错误原因
在这里插入图片描述

导入实体
@Data
@AllArgsConstructor
@NoArgsConstructor
public class ExcelDto  implements Serializable{

        /**
         * 用户名
         */
        @ExcelProperty("用户名")
        private String userName;
        /**
         * 地址
         */
        @ExcelProperty( "地址")
        private String addRess;
        /**
         * 年龄
         */
        @ExcelProperty("年龄")
        private Integer age;

}

导出excel 错误数据实体
@Data
@AllArgsConstructor
@NoArgsConstructor
public class ExcelError {
    /**
     * 行号
     */
    @Excel(name = "行号", orderNum = "0")
    @ExcelProperty("行号")
    private Integer lineNumber;

    /**
     * 数据
     */
    @Excel(name = "数据", orderNum = "1")
    @ExcelProperty("数据")
    private String data;

    /**
     * 原因
     */
    @Excel(name = "原因", orderNum = "2")
    @ExcelProperty("原因")
    private String reason;

}

controller


@RequestMapping ("/inexcel")
    public void importExcel(MultipartFile file, HttpServletResponse response,Long id) throws IOException {
        ImportExcelService iinport = new ImportExcelService(id, response);
        try {
            // 全部数控
            List<ExcelDto> objects = EasyExcel.read(new BufferedInputStream(file.getInputStream()), ExcelDto.class, iinport)
                    .sheet()
                    .doReadSync();
            // 异常数据
            List<ExcelError> errorList = iinport.ret();
            if(!CollectionUtils.isEmpty(errorList)){
                // 错误数据---发送给前端界面
                write(response,errorList);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }catch (ExcelAnalysisException e){
            e.printStackTrace();
            // 此处是查询出哪一行 ， 哪一列 数据格式不对导致出问题！！！！！！！！！！！！！！！
            if (e.getCause() instanceof ExcelDataConvertException) {
                ExcelDataConvertException excelDataConvertException = (ExcelDataConvertException) e.getCause();
                String cellMsg = "";
                CellData cellData = excelDataConvertException.getCellData();
                //这里有一个celldatatype的枚举值,用来判断CellData的数据类型
                CellDataTypeEnum type = cellData.getType();
                if (type.equals(CellDataTypeEnum.NUMBER)) {
                    cellMsg = cellData.getNumberValue().toString();
                } else if (type.equals(CellDataTypeEnum.STRING)) {
                    cellMsg = cellData.getStringValue();
                } else if (type.equals(CellDataTypeEnum.BOOLEAN)) {
                    cellMsg = cellData.getBooleanValue().toString();
                }
                // excel表格:第2行,第3列,数据值为:xa,该数据值不符合要求,请检验后重新导入! 请检查其他的记录是否有同类型的错误!
                Integer rowNumber = excelDataConvertException.getRowIndex() + 1;
                Integer cellNumber = excelDataConvertException.getColumnIndex()+1;
                String errorMsg = String.format("excel表格:第%s行,第%s列,数据值为:%s,该数据值不符合要求,请检验后重新导入! 请检查其他的记录是否有同类型的错误!",rowNumber , cellNumber, cellMsg);
                System.out.println(errorMsg);
                // 写出字段类型错误文件！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！
                List<ExcelError> excelErrorList = new ArrayList<>();
                excelErrorList.add(new ExcelError(rowNumber,cellMsg ,errorMsg));
                write(response,excelErrorList);


            }
        }
    }

    public void write(HttpServletResponse response, List<ExcelError> excelErrorList) throws IOException {
        WriteToExcel<ExcelError> writeToExcel = new WriteToExcel<>();
        writeToExcel.createExcelToWeb(response,
                excelErrorList,
                Arrays.asList("行号","数据","原因"),
                Arrays.asList("lineNumber","data","reason"),
                "sheet1",
                "异常数据.xlsx");
    }

导入数据监听类


public class ImportExcelService extends AnalysisEventListener<ExcelDto> {

    private Long Id;
    private HttpServletResponse response ;
    List<ExcelDto> list =  new ArrayList<>();
    List<ExcelError> excelErrorList =  new ArrayList<>();

    // 行号
    int number = 0;
    public ImportExcelService(Long Id, HttpServletResponse response) {
        number = 0;
        Id = Id;
        response = response;

    }


    // 每读取一行就调用该方法
    @Override
    public void invoke(ExcelDto excelDto, AnalysisContext analysisContext) {

        if(StringUtils.isEmpty(excelDto.getAddRess()))
        {
            excelErrorList.add(new ExcelError(number,excelDto.getUserName()
                    +" - "+excelDto.getAddRess()+" - "+excelDto.getAge(),"address 为空"));
        }else if(StringUtils.isEmpty(excelDto.getUserName())){
            excelErrorList.add(new ExcelError(number,excelDto.getUserName()
                    +" - "+excelDto.getAddRess()+" - "+excelDto.getAge(),"username 为空"));
        }
        list.add(excelDto);
        number ++;
    }

    // 全部读取完成就调用该方法
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {
        if(!CollectionUtils.isEmpty(excelErrorList)){

        }
    }

    public List<ExcelError> ret(){
        return excelErrorList;
    }
}

        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-spring-boot-starter</artifactId>
            <version>4.2.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>4.0.1</version>
        </dependency>
        <dependency>
            　　<groupId>com.alibaba</groupId>
            　　<artifactId>easyexcel</artifactId>
            　　<version>2.1.1</version>
        </dependency>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.8.5</version>
        </dependency>

数据返给前端工具类，直接使用
public class WriteToExcel<T> {
    private static XSSFWorkbook workbook;
    private static XSSFSheet sheet;
    private static XSSFRow row;
    private static XSSFCell cell;
    private static File file;

    /**
     *
     * @param listData 数据
     * @param headList 表头list 例 Arrays.asList("昵称","年龄","地址");
     * @param fields   属性list 例 Arrays.asList("name","age");
     * @param sheet    sheet 名称
     * @param url      存储位置 例 C:\Users\Desktop\员工信息-1月.xlsx
     */
    public void createExcel( List<T> listData,
                             List<String> headList,
                             List<String> fields,
                             String sheet,
                             String url)  {
        //空数据
        if(CollectionUtils.isEmpty(listData)){
            return;
        }
        //保存位置null
        if(StringUtils.isEmpty(url)){
            System.err.println("保存位置null");
            return;
        }
        if(StringUtils.isEmpty(sheet)){
            sheet = "sheet1";
        }
        WriteToExcel<T> writeToExcel = new WriteToExcel<>();
        //sheet 页名称
        WriteToExcel.setSheet(sheet);
        //设置表头
        WriteToExcel.createHead(headList);
        //设置内容
        boolean flag = writeToExcel.createContent(listData,fields);
        if(flag){
            //写入文件
            WriteToExcel.writeToFile(url);
        }
    }
    public void createExcelToWeb(
            HttpServletResponse response,
            List<T> listData,
            List<String> headList,
            List<String> fields,
            String sheet,
            String name) throws IOException {
        //空数据
        if(CollectionUtils.isEmpty(listData)){
            return;
        }
        //name null
        if(StringUtils.isEmpty(name)){
            System.err.println(" name null");
            return;
        }
        if(StringUtils.isEmpty(sheet)){
            sheet = "sheet1";
        }
        WriteToExcel<T> writeToExcel = new WriteToExcel<>();
        //sheet 页名称
        WriteToExcel.setSheet(sheet);
        //设置表头
        WriteToExcel.createHead(headList);
        //设置内容
        boolean flag = writeToExcel.createContent(listData,fields);
        if(flag){
            //写入文件
            WriteToExcel.writeToFiletoWeb(response,name);
        }
    }
    //创建sheet页
    public static void setSheet(String sheetName) {
        workbook = new XSSFWorkbook();
        sheet = workbook.createSheet(sheetName);
    }
    //创建表头
    public static void createHead(List<String> headList) {
        //创建表头，也就是第一行
        row = sheet.createRow(0);
        for (int i = 0; i < headList.size(); i++) {
            cell = row.createCell(i);
            cell.setCellValue(headList.get(i));
            // 宽度
            cell.getSheet().setColumnWidth(i,20*256);
            //一般格式
            XSSFFont font = workbook.createFont();
            // 加粗
            font.setBold(true);
            font.setFontHeightInPoints((short)20);
            // 样式对象
            XSSFCellStyle style = workbook.createCellStyle();
            //背景色
            style.setFillForegroundColor(new XSSFColor(new java.awt.Color(80, 142, 198)));
            // 填充方式  全部填充
            style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
            style.setFont(font);
            cell.setCellStyle(style);
        }
    }
    public  boolean createContent(List<T> contentList, List<String> fields) {
        boolean flag = true;
        //创建表内容，从第二行开始
        try {
            for (int i = 0; i < contentList.size(); i++) {
                row = sheet.createRow(i + 1);
                //遍历每一个字段
                for (int j = 0; j < fields.size(); j++) {
                    Field f = contentList.get(i).getClass().getDeclaredField(fields.get(j));
                    f.setAccessible(true);
                    // 获取属性值
                    Object field = f.get(contentList.get(i));
                    // 字段非空
                    if(ObjectUtil.isNotEmpty(field)){
                        System.out.println(field);
                        //object 强转 string
                        row.createCell(j).setCellValue(field.toString());
                    }
                }
            }
        }catch (Exception e){
            System.err.println("属性获取异常="+e.getMessage() );
            flag = false;
        }
        return flag;
    }
    //写入文件
    public static void writeToFile(String filePath){
        file = new File(filePath);
        //将文件保存到指定的位置
        try {
            workbook.write(new FileOutputStream(file));
            System.out.println("写入成功");
            workbook.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    //写入文件
    public static void writeToFiletoWeb(HttpServletResponse response,String name) throws IOException {
        // 5、导出excel
        response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(name, "UTF-8"));
        ServletOutputStream out = response.getOutputStream();
        workbook.write(out);
        out.close();
        workbook.close();
    }


}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="te/inexcel" method="post" enctype="multipart/form-data">
    <p><input type="file" name="file"></p>
    <p><input type="submit">提交</p>
</form>
</body>
</html>