easy exlsx

dating-agency-mall-server/pom.xml

@@ -107,6 +107,12 @@
             <artifactId>auto_1479188381469-20191226</artifactId>
             <version>1.0.0</version>
         </dependency>
+        <!--   easyExcel   -->
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>easyexcel</artifactId>
+            <version>3.0.0-beta3</version>
+        </dependency>
     </dependencies>
 
     <build>

dating-agency-mall-server/src/main/java/com/qniao/dam/api/query/download/user/DownloadUserCommandController.java

@@ -0,0 +1,35 @@
+package com.qniao.dam.api.query.download.user;
+
+import com.qniao.dam.application.service.download.DownloadService;
+import com.qniao.framework.annotation.IgnoreResponseAdvice;
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiOperation;
+import io.swagger.annotations.ApiParam;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import javax.annotation.Resource;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * @author Zpj
+ * @date 2022/7/15
+ */
+@Api(tags = "下载")
+@RequestMapping("user")
+@RestController
+public class DownloadUserCommandController {
+
+    @Resource
+    private DownloadService downloadService;
+
+    @ApiOperation("用户下载临时生成的导出文件")
+    @IgnoreResponseAdvice
+    @GetMapping("/download/temp/{fileName}")
+    public void userDownloadTempFile(@ApiParam("文件名") @PathVariable String fileName,
+                                     HttpServletResponse response) {
+        downloadService.downloadTempFile(fileName, response);
+    }
+}

dating-agency-mall-server/src/main/java/com/qniao/dam/application/service/download/DownloadService.java

@@ -0,0 +1,76 @@
+package com.qniao.dam.application.service.download;
+
+import com.qniao.framework.exception.BizException;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServletResponse;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.net.URLEncoder;
+
+/**
+ * @author Zpj
+ * @date 2022/2/18
+ */
+@Service
+@Slf4j
+public class DownloadService {
+
+    @Value("${server-file-path}")
+    private String serverFilePath;
+
+    /**
+     * 下载临时文件
+     *
+     * @param fileName 文件名
+     * @param response 响应
+     */
+    public void downloadTempFile(String fileName, HttpServletResponse response) {
+        File f = new File(serverFilePath + "/temp/" + fileName);
+
+        ServletOutputStream out = null;
+        FileInputStream is = null;
+        try {
+            is = new FileInputStream(f);
+            byte[] b = new byte[is.available()];
+            is.read(b);
+
+            //解决中文文件名下载后乱码的问题
+            String fName = URLEncoder.encode(fileName, "utf-8");
+
+            response.setContentType("application/octet-stream");
+            response.setCharacterEncoding("utf-8");
+            response.setHeader("Content-Disposition", "attachment; filename=" + fName + "");
+            //获取响应报文输出流对象
+            out = response.getOutputStream();
+            out.write(b);
+            out.flush();
+        } catch (IOException e) {
+            throw new BizException(-1, "未知错误:" + e.getLocalizedMessage());
+        } finally {
+            //删除临时文件
+            if (f.exists()) {
+                f.delete();
+            }
+
+            if (out != null) {
+                try {
+                    out.close();
+                } catch (IOException eOut) {
+                    log.error("输出流关闭异常", eOut);
+                }
+            }
+            if (is != null) {
+                try {
+                    is.close();
+                } catch (IOException eIs) {
+                    log.error("输入流关闭异常", eIs);
+                }
+            }
+        }
+    }
+}

dating-agency-mall-server/src/main/java/com/qniao/dam/infrastructure/easyexcel/EasyExcelUtil.java

@@ -0,0 +1,123 @@
+package com.qniao.dam.infrastructure.easyexcel;
+
+import com.alibaba.excel.EasyExcel;
+import com.alibaba.excel.ExcelWriter;
+import com.alibaba.excel.write.metadata.WriteSheet;
+import com.qniao.dam.infrastructure.easyexcel.converter.CustomBigDecimalConverter;
+import com.qniao.dam.infrastructure.easyexcel.converter.CustomLongConverter;
+import com.qniao.dam.infrastructure.easyexcel.converter.CustomerLocalDateConverter;
+import com.qniao.dam.infrastructure.easyexcel.converter.CustomerLocalDateTimeConverter;
+import com.qniao.dam.infrastructure.easyexcel.handler.ImageModifyHandler;
+import com.qniao.framework.exception.BizException;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+
+import javax.servlet.http.HttpServletResponse;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URLEncoder;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author Lzk
+ * @date 2022/12/08
+ */
+@Component
+public class EasyExcelUtil {
+
+    @Value("${server-file-path:/}")
+    private String sFilePath;
+
+    public String writeToFilePath(InputStream templateFileInputStream, Object data) {
+        String finalXlsxPath = sFilePath + "/temp/";
+        File file = new File(finalXlsxPath);
+        if (!file.exists()) {
+            if (!file.mkdir()) {
+                throw new BizException("文件目录生成失败");
+            }
+        }
+        String fileName;
+        long timeMillis = System.currentTimeMillis();
+        fileName = timeMillis + ".xlsx";
+        finalXlsxPath += fileName;
+        ExcelWriter excelWriter = EasyExcel.write(finalXlsxPath)
+                .registerConverter(new CustomBigDecimalConverter())
+                .registerConverter(new CustomLongConverter())
+                .registerConverter(new CustomerLocalDateTimeConverter())
+                .registerConverter(new CustomerLocalDateConverter())
+                .withTemplate(templateFileInputStream)
+                .build();
+        WriteSheet writeSheet = EasyExcel.writerSheet().build();
+        excelWriter.fill(data, writeSheet);
+        excelWriter.finish();
+        // 返回下载相对路径
+        return fileName;
+    }
+
+    public String exportTemplate(InputStream templateFileInputStream, List<Object> data) {
+        String finalXlsxPath = sFilePath + "/temp/";
+        File file = new File(finalXlsxPath);
+        if (!file.exists()) {
+            if (!file.mkdir()) {
+                throw new BizException("文件目录生成失败");
+            }
+        }
+        String fileName;
+        long timeMillis = System.currentTimeMillis();
+        fileName = timeMillis + ".xlsx";
+        finalXlsxPath += fileName;
+        ExcelWriter excelWriter = EasyExcel.write(finalXlsxPath)
+                .registerConverter(new CustomBigDecimalConverter())
+                .registerConverter(new CustomLongConverter())
+                .registerConverter(new CustomerLocalDateTimeConverter())
+                .registerConverter(new CustomerLocalDateConverter())
+                .registerWriteHandler(new ImageModifyHandler())
+                .withTemplate(templateFileInputStream)
+                .build();
+        WriteSheet writeSheet = EasyExcel.writerSheet().build();
+        // 单表多数据导出 模板格式为 {.属性}
+        for (Object d : data) {
+            excelWriter.fill(d, writeSheet);
+        }
+
+        excelWriter.finish();
+        // 返回下载相对路径
+        return fileName;
+    }
+
+    /**
+     * 通过模板文件名获取模板的输入流
+     * <p><strong>模板文件必须放置在resource/templates下</strong></p>
+     *
+     * @param templateFileName 模板文件名
+     * @return 对应文件的输入流
+     */
+    public InputStream getTemplateFileAsStream(String templateFileName) {
+        //如果采用getPath方法获取文件地址本地环境可以获取到，上传到服务器后会失效，采用流可以都生效。
+        return EasyExcelUtil.class.getClassLoader().getResourceAsStream("templates/" + templateFileName + ".xlsx");
+    }
+
+
+    /**
+     * 浏览器写入excel
+     *
+     * @param downloadFileName 下载文件名字
+     * @param pojoClass        pojo类
+     * @param response         响应
+     */
+    public void writeToExcelForResponse(String downloadFileName, Class pojoClass, HttpServletResponse response) {
+        // 这里注意 使用swagger 会导致各种问题，easyexcel官方文档推荐直接用浏览器或者用postman测试
+        response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
+        response.setCharacterEncoding("utf-8");
+        try {
+            // 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
+            String fileName = URLEncoder.encode(downloadFileName, "UTF-8").replaceAll("\\+", "%20");
+            response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");
+            EasyExcel.write(response.getOutputStream(), pojoClass).sheet(downloadFileName).doWrite(new ArrayList<>());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}

dating-agency-mall-server/src/main/java/com/qniao/dam/infrastructure/easyexcel/converter/CustomBigDecimalConverter.java

@@ -0,0 +1,67 @@
+package com.qniao.dam.infrastructure.easyexcel.converter;
+
+import com.alibaba.excel.converters.Converter;
+import com.alibaba.excel.enums.CellDataTypeEnum;
+import com.alibaba.excel.metadata.GlobalConfiguration;
+import com.alibaba.excel.metadata.data.ReadCellData;
+import com.alibaba.excel.metadata.data.WriteCellData;
+import com.alibaba.excel.metadata.property.ExcelContentProperty;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+/**
+ * 自定义BigDecimal类型处理器
+ *
+ * @author nicemorning
+ * @date 2021/9/17 16:37
+ */
+public class CustomBigDecimalConverter implements Converter<BigDecimal> {
+    /**
+     * Back to object types in Java
+     *
+     * @return Support for Java class
+     */
+    @Override
+    public Class<BigDecimal> supportJavaTypeKey() {
+        return BigDecimal.class;
+    }
+
+    /**
+     * Back to object enum in excel
+     *
+     * @return Support for {@link CellDataTypeEnum}
+     */
+    @Override
+    public CellDataTypeEnum supportExcelTypeKey() {
+        return CellDataTypeEnum.NUMBER;
+    }
+
+    /**
+     * Convert excel objects to Java objects
+     *
+     * @param cellData            Excel cell data.NotNull.
+     * @param contentProperty     Content property.Nullable.
+     * @param globalConfiguration Global configuration.NotNull.
+     * @return Data to put into a Java object
+     * @throws Exception Exception.
+     */
+    @Override
+    public BigDecimal convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
+        return new BigDecimal(cellData.getNumberValue().toPlainString()).setScale(3, RoundingMode.HALF_UP);
+    }
+
+    /**
+     * Convert Java objects to excel objects
+     *
+     * @param value               Java Data.NotNull.
+     * @param contentProperty     Content property.Nullable.
+     * @param globalConfiguration Global configuration.NotNull.
+     * @return Data to put into a Excel
+     * @throws Exception Exception.
+     */
+    @Override
+    public WriteCellData<BigDecimal> convertToExcelData(BigDecimal value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
+        return new WriteCellData<>(value.setScale(3, RoundingMode.HALF_UP).toPlainString());
+    }
+}

dating-agency-mall-server/src/main/java/com/qniao/dam/infrastructure/easyexcel/converter/CustomImageConverter.java

@@ -0,0 +1,90 @@
+package com.qniao.dam.infrastructure.easyexcel.converter;
+
+
+
+import com.alibaba.excel.converters.Converter;
+import com.alibaba.excel.enums.CellDataTypeEnum;
+import com.alibaba.excel.metadata.GlobalConfiguration;
+import com.alibaba.excel.metadata.data.ReadCellData;
+import com.alibaba.excel.metadata.data.WriteCellData;
+import com.alibaba.excel.metadata.property.ExcelContentProperty;
+import com.alibaba.excel.util.IoUtils;
+import com.alibaba.excel.util.StringUtils;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.ConnectException;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.net.URLConnection;
+
+public class CustomImageConverter implements Converter<String> {
+    @Override
+    public Class supportJavaTypeKey()
+    {
+        return String.class;
+    }
+
+    @Override
+    public CellDataTypeEnum supportExcelTypeKey()
+    {
+        return CellDataTypeEnum.RICH_TEXT_STRING;
+    }
+
+    @Override
+    public String convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty,
+                                    GlobalConfiguration globalConfiguration)
+    {
+        throw new UnsupportedOperationException("Cannot convert images to string");
+    }
+
+    // 图片失效处理
+    @Override
+    public WriteCellData<Object> convertToExcelData(String value, ExcelContentProperty contentProperty,
+                                                    GlobalConfiguration globalConfiguration)
+            throws IOException
+    {
+        InputStream inputStream = null;
+        try
+        {
+            if(StringUtils.isEmpty(value))
+            {
+                return new WriteCellData<>("图片路径为空");
+            }
+            URL urlValue = new URL(value);
+            // 开启连接
+            URLConnection uc = urlValue.openConnection();
+            // 获取响应状态
+            int statusCode = ((HttpURLConnection)uc).getResponseCode();
+            switch (statusCode)
+            {
+                case 200:
+                    inputStream = urlValue.openStream();
+                    break;
+                default:
+                    return new WriteCellData<>("无法加载图片");
+            }
+            byte[] bytes = IoUtils.toByteArray(inputStream);
+            WriteCellData<Object> cellData = new WriteCellData<>(bytes);
+            cellData.setType(CellDataTypeEnum.NUMBER);
+            return cellData;
+        }
+        catch (ConnectException exception)
+        {
+            return new WriteCellData<>("无法加载图片");
+        }
+        catch (FileNotFoundException fileNotFoundException)
+        {
+            return new WriteCellData<>("无法加载图片");
+        }
+        finally
+        {
+            if (inputStream != null)
+            {
+                inputStream.close();
+            }
+        }
+    }
+
+}

dating-agency-mall-server/src/main/java/com/qniao/dam/infrastructure/easyexcel/converter/CustomLongConverter.java

@@ -0,0 +1,64 @@
+package com.qniao.dam.infrastructure.easyexcel.converter;
+
+import com.alibaba.excel.converters.Converter;
+import com.alibaba.excel.enums.CellDataTypeEnum;
+import com.alibaba.excel.metadata.GlobalConfiguration;
+import com.alibaba.excel.metadata.data.ReadCellData;
+import com.alibaba.excel.metadata.data.WriteCellData;
+import com.alibaba.excel.metadata.property.ExcelContentProperty;
+
+/**
+ * 自定义Long类型处理器
+ *
+ * @author nicemorning
+ * @date 2021/9/17 14:56
+ */
+public class CustomLongConverter implements Converter<Long> {
+    /**
+     * Back to object types in Java
+     *
+     * @return Support for Java class
+     */
+    @Override
+    public Class<Long> supportJavaTypeKey() {
+        return Long.class;
+    }
+
+    /**
+     * Back to object enum in excel
+     *
+     * @return Support for {@link CellDataTypeEnum}
+     */
+    @Override
+    public CellDataTypeEnum supportExcelTypeKey() {
+        return CellDataTypeEnum.NUMBER;
+    }
+
+    /**
+     * Convert excel objects to Java objects
+     *
+     * @param cellData            Excel cell data.NotNull.
+     * @param contentProperty     Content property.Nullable.
+     * @param globalConfiguration Global configuration.NotNull.
+     * @return Data to put into a Java object
+     * @throws Exception Exception.
+     */
+    @Override
+    public Long convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
+        return null;
+    }
+
+    /**
+     * Convert Java objects to excel objects
+     *
+     * @param value               Java Data.NotNull.
+     * @param contentProperty     Content property.Nullable.
+     * @param globalConfiguration Global configuration.NotNull.
+     * @return Data to put into a Excel
+     * @throws Exception Exception.
+     */
+    @Override
+    public WriteCellData<String> convertToExcelData(Long value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
+        return new WriteCellData<>(String.valueOf(value));
+    }
+}

dating-agency-mall-server/src/main/java/com/qniao/dam/infrastructure/easyexcel/converter/CustomerLocalDateConverter.java

@@ -0,0 +1,69 @@
+package com.qniao.dam.infrastructure.easyexcel.converter;
+
+import com.alibaba.excel.converters.Converter;
+import com.alibaba.excel.enums.CellDataTypeEnum;
+import com.alibaba.excel.metadata.GlobalConfiguration;
+import com.alibaba.excel.metadata.data.ReadCellData;
+import com.alibaba.excel.metadata.data.WriteCellData;
+import com.alibaba.excel.metadata.property.ExcelContentProperty;
+
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+
+/**
+ * 自定义LocalDate类型处理器
+ *
+ * @author nicemorning
+ * @date 2021/9/24 19:59
+ */
+public class CustomerLocalDateConverter implements Converter<LocalDate> {
+    private final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd");
+
+    /**
+     * Back to object types in Java
+     *
+     * @return Support for Java class
+     */
+    @Override
+    public Class<LocalDate> supportJavaTypeKey() {
+        return LocalDate.class;
+    }
+
+    /**
+     * Back to object enum in excel
+     *
+     * @return Support for {@link CellDataTypeEnum}
+     */
+    @Override
+    public CellDataTypeEnum supportExcelTypeKey() {
+        return CellDataTypeEnum.STRING;
+    }
+
+    /**
+     * Convert excel objects to Java objects
+     *
+     * @param cellData            Excel cell data.NotNull.
+     * @param contentProperty     Content property.Nullable.
+     * @param globalConfiguration Global configuration.NotNull.
+     * @return Data to put into a Java object
+     * @throws Exception Exception.
+     */
+    @Override
+    public LocalDate convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
+        return LocalDate.parse(cellData.getStringValue(), DATE_TIME_FORMATTER);
+    }
+
+    /**
+     * Convert Java objects to excel objects
+     *
+     * @param value               Java Data.NotNull.
+     * @param contentProperty     Content property.Nullable.
+     * @param globalConfiguration Global configuration.NotNull.
+     * @return Data to put into a Excel
+     * @throws Exception Exception.
+     */
+    @Override
+    public WriteCellData<String> convertToExcelData(LocalDate value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
+        return new WriteCellData<>(DATE_TIME_FORMATTER.format(value));
+    }
+}

dating-agency-mall-server/src/main/java/com/qniao/dam/infrastructure/easyexcel/converter/CustomerLocalDateTimeConverter.java

@@ -0,0 +1,69 @@
+package com.qniao.dam.infrastructure.easyexcel.converter;
+
+import com.alibaba.excel.converters.Converter;
+import com.alibaba.excel.enums.CellDataTypeEnum;
+import com.alibaba.excel.metadata.GlobalConfiguration;
+import com.alibaba.excel.metadata.data.ReadCellData;
+import com.alibaba.excel.metadata.data.WriteCellData;
+import com.alibaba.excel.metadata.property.ExcelContentProperty;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+/**
+ * 自定义LocalDateTime类型处理器
+ *
+ * @author nicemorning
+ * @date 2021/9/24 19:54
+ */
+public class CustomerLocalDateTimeConverter implements Converter<LocalDateTime> {
+    private final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
+
+    /**
+     * Back to object types in Java
+     *
+     * @return Support for Java class
+     */
+    @Override
+    public Class<LocalDateTime> supportJavaTypeKey() {
+        return LocalDateTime.class;
+    }
+
+    /**
+     * Back to object enum in excel
+     *
+     * @return Support for {@link CellDataTypeEnum}
+     */
+    @Override
+    public CellDataTypeEnum supportExcelTypeKey() {
+        return CellDataTypeEnum.STRING;
+    }
+
+    /**
+     * Convert excel objects to Java objects
+     *
+     * @param cellData            Excel cell data.NotNull.
+     * @param contentProperty     Content property.Nullable.
+     * @param globalConfiguration Global configuration.NotNull.
+     * @return Data to put into a Java object
+     * @throws Exception Exception.
+     */
+    @Override
+    public LocalDateTime convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
+        return LocalDateTime.parse(cellData.getStringValue(), DATE_TIME_FORMATTER);
+    }
+
+    /**
+     * Convert Java objects to excel objects
+     *
+     * @param value               Java Data.NotNull.
+     * @param contentProperty     Content property.Nullable.
+     * @param globalConfiguration Global configuration.NotNull.
+     * @return Data to put into a Excel
+     * @throws Exception Exception.
+     */
+    @Override
+    public WriteCellData<String> convertToExcelData(LocalDateTime value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
+        return new WriteCellData<>(DATE_TIME_FORMATTER.format(value));
+    }
+}

dating-agency-mall-server/src/main/java/com/qniao/dam/infrastructure/easyexcel/handler/ImageModifyHandler.java

@@ -0,0 +1,94 @@
+package com.qniao.dam.infrastructure.easyexcel.handler;
+
+import com.alibaba.excel.metadata.Head;
+import com.alibaba.excel.metadata.data.ImageData;
+import com.alibaba.excel.metadata.data.WriteCellData;
+import com.alibaba.excel.write.handler.CellWriteHandler;
+import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
+import com.alibaba.excel.write.metadata.holder.WriteTableHolder;
+import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.ss.util.CellRangeAddress;
+import org.springframework.util.CollectionUtils;
+
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * 修改图像处理程序
+ *
+ * @author admin
+ * @date 2023/01/16
+ */
+public class ImageModifyHandler implements CellWriteHandler {
+    /**
+     * 后单元格数据转换
+     *
+     * @param writeSheetHolder 写单夹
+     * @param writeTableHolder 写表夹
+     * @param cellData         单元格数据
+     * @param cell             细胞
+     * @param head             头
+     * @param relativeRowIndex 相对行索引
+     * @param isHead           是头
+     */
+    @Override
+    public void afterCellDataConverted(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder,
+                                       WriteCellData<?> cellData, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) {
+        boolean noImageValue = Objects.isNull(cellData) || CollectionUtils.isEmpty(cellData.getImageDataList());
+        if (Objects.equals(Boolean.TRUE, isHead) || noImageValue) {
+            return;
+        }
+        Sheet sheet = cell.getSheet();
+        int mergeColumNum = getMergeColumNum(cell, sheet);
+        int mergeRowNum = getMergeRowNum(cell, sheet);
+        ImageData imageData = cellData.getImageDataList().get(0);
+        imageData.setRelativeLastRowIndex(mergeRowNum - 1);
+        imageData.setRelativeLastColumnIndex(mergeColumNum - 1);
+        CellWriteHandler.super.afterCellDataConverted(writeSheetHolder, writeTableHolder, cellData, cell, head, relativeRowIndex, isHead);
+    }
+
+
+    /**
+     * 得到合并行num
+     *
+     * @param cell  细胞
+     * @param sheet 表
+     * @return int
+     */
+    public static int getMergeRowNum(Cell cell, Sheet sheet) {
+        int mergeSize = 1;
+        List<CellRangeAddress> mergedRegions = sheet.getMergedRegions();
+        for (CellRangeAddress cellRangeAddress : mergedRegions) {
+            if (cellRangeAddress.isInRange(cell)) {
+                //获取合并的行数
+                mergeSize = cellRangeAddress.getLastRow() - cellRangeAddress.getFirstRow() + 1;
+                break;
+            }
+        }
+        return mergeSize;
+    }
+
+    /**
+     * 得到合并列num
+     *
+     * @param cell  细胞
+     * @param sheet 表
+     * @return int
+     */
+    public static int getMergeColumNum(Cell cell, Sheet sheet) {
+        int mergeSize = 1;
+        List<CellRangeAddress> mergedRegions = sheet.getMergedRegions();
+        for (CellRangeAddress cellRangeAddress : mergedRegions) {
+            if (cellRangeAddress.isInRange(cell)) {
+                //获取合并的列数
+                mergeSize = cellRangeAddress.getLastColumn() - cellRangeAddress.getFirstColumn() + 1;
+                break;
+            }
+        }
+        return mergeSize;
+    }
+
+}
+
+

dating-agency-mall-server/src/main/java/com/qniao/dam/infrastructure/easyexcel/listener/ExportListener.java

@@ -0,0 +1,172 @@
+package com.qniao.dam.infrastructure.easyexcel.listener;
+
+import com.alibaba.excel.EasyExcel;
+import com.alibaba.excel.ExcelWriter;
+import com.alibaba.excel.write.metadata.WriteSheet;
+import com.qniao.domain.QnPage;
+import com.qniao.framework.exception.BizException;
+import com.qniao.framework.utils.PageUtil;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+import org.springframework.util.CollectionUtils;
+
+import javax.annotation.PostConstruct;
+import java.io.File;
+import java.util.List;
+import java.util.Set;
+import java.util.function.Function;
+
+/**
+ * R: 需要传入查询SQL接收的DTO（也是设置了excel的格式内容的DTO）
+ *
+ * @author Lzk
+ * @date 2022/3/24
+ **/
+@Slf4j
+@Component
+public class ExportListener<R> {
+
+    /**
+     * 设置一次存的条数
+     */
+    private static final Integer PAGE_SIZE = 2500;
+
+
+    @Value("${server-file-path:/}")
+    private String sFilePath;
+
+    private static String serverFilePath;
+
+    @PostConstruct
+    public void init() {
+        serverFilePath = this.sFilePath;
+    }
+
+    /**
+     * 导出excel
+     *
+     * @param sheetName      excel页名称
+     * @param pojoClass      导出对应的Dto对象
+     * @param pageUtil       分页参数（用于设置分页参数，更改分页的结果）
+     * @param selectFunction 按照传入的分页参数，查询每次的结果
+     * @return excel的服务器下载地址
+     */
+    public String exportExcel(String sheetName, Class<R> pojoClass, PageUtil pageUtil, Function<PageUtil, QnPage<R>> selectFunction) {
+        // 导出的excel名称
+        String fileName;
+        try {
+            String finalXlsxPath = serverFilePath + "/temp/";
+            File file = new File(finalXlsxPath);
+            if (!file.exists()) {
+                file.mkdir();
+            }
+            fileName = String.valueOf(System.currentTimeMillis());
+            finalXlsxPath += fileName + ".xlsx";
+
+            // 这里 需要指定写用哪个class去写
+            ExcelWriter excelWriter = EasyExcel.write(finalXlsxPath, pojoClass).build();
+            // 这里注意 如果同一个sheet只要创建一次
+            WriteSheet writeSheet = EasyExcel.writerSheet(sheetName).build();
+
+            // 开始下标
+            int startIndex = 1;
+            // 去调用写入,根据数据库分页的总的页数来
+            while (true) {
+                // 已经查询到的数据量
+                int startParam = (startIndex - 1) * PAGE_SIZE;
+                // 计算现在是第几页
+                int pageNumber = (int) Math.ceil((double) startParam / (double) PAGE_SIZE + 1);
+
+                // 设置需要查询的页数和每页的大小
+                pageUtil.setPageNum(pageNumber);
+                pageUtil.setPageSize(PAGE_SIZE);
+                // 再次回调查询
+                QnPage<R> cityPage = selectFunction.apply(pageUtil);
+                List<R> pageList = cityPage.getRecords();
+                if (CollectionUtils.isEmpty(pageList)) {
+                    break;
+                }
+                // 下标+1
+                startIndex++;
+                excelWriter.write(pageList, writeSheet);
+            }
+
+            // 千万别忘记finish 会帮忙关闭流
+            excelWriter.finish();
+        } catch (Exception e) {
+            log.error("excel导出异常:", e);
+            throw new BizException("excel导出异常");
+        }
+        return fileName + ".xlsx";
+    }
+
+    /**
+     * 动态导出excel(自定义选择要导出的字段)
+     * 注：如果需要重复的N行时，需要屏蔽的其他行数据时，展示字段必填
+     *
+     * @param sheetName      sheet页名称
+     * @param pojoClass      导出的模板
+     * @param pageUtil       分页对象
+     * @param selectExport   选择要导出的字段index(从0开始,必填)
+     * @param selectFunction 按照传入的分页参数，查询每次的结果
+     * @return excel服务器下载地址
+     */
+    public String dynamicExportExcel(String sheetName,
+                                     Class<R> pojoClass,
+                                     PageUtil pageUtil,
+                                     Set<Integer> selectExport,
+                                     Function<PageUtil, QnPage<R>> selectFunction) {
+
+        if (CollectionUtils.isEmpty(selectExport)) {
+            throw new BizException("要导出的字段不能为空！");
+        }
+
+        // 导出的excel名称
+        String fileName;
+        try {
+            String finalXlsxPath = serverFilePath + "/temp/";
+            File file = new File(finalXlsxPath);
+            if (!file.exists()) {
+                file.mkdir();
+            }
+            fileName = String.valueOf(System.currentTimeMillis());
+            finalXlsxPath += fileName + ".xlsx";
+
+            // 把自定义的表头设置为模板
+            ExcelWriter excelWriter = EasyExcel.write(finalXlsxPath, pojoClass).includeColumnIndexes(selectExport).build();
+
+            // 这里注意 如果同一个sheet只要创建一次
+            WriteSheet writeSheet = EasyExcel.writerSheet(sheetName).build();
+
+            // 开始下标
+            int startIndex = 1;
+            // 去调用写入,根据数据库分页的总的页数来
+            while (true) {
+                // 已经查询到的数据量
+                int startParam = (startIndex - 1) * PAGE_SIZE;
+                // 计算现在是第几页
+                int pageNumber = (int) Math.ceil((double) startParam / (double) PAGE_SIZE + 1);
+                // 设置需要查询的页数和每页的大小
+                pageUtil.setPageNum(pageNumber);
+                pageUtil.setPageSize(PAGE_SIZE);
+                // 再次回调查询
+                QnPage<R> cityPage = selectFunction.apply(pageUtil);
+                List<R> pageList = cityPage.getRecords();
+                if (CollectionUtils.isEmpty(pageList)) {
+                    break;
+                }
+                // 下标+1
+                startIndex++;
+                excelWriter.write(pageList, writeSheet);
+            }
+
+            // 千万别忘记finish 会帮忙关闭流
+            excelWriter.finish();
+        } catch (Exception e) {
+            log.error("excel导出异常:", e);
+            throw new BizException("excel导出异常");
+        }
+        return fileName + ".xlsx";
+    }
+}

dating-agency-mall-server/src/main/resources/application.yml

@@ -103,4 +103,7 @@ snow-flake:
 ding-talk-alarm-robot-access-token: 1
 
 logging:
-  config: classpath:logback.xml
+  config: classpath:logback.xml
+
+# 服务器文件存放路径
+server-file-path: /home/files/