工具类

入参

dart 复制代码
@RequestBody List<Map<String, Object>> dataList
dart 复制代码
Sheet sheet = convertDataListToSheet(dataList);
dart 复制代码
 List<List<String>> data = wrapListMapToList(dataList);
dart 复制代码
在这里插入代码片
dart 复制代码
    private List<List<String>> wrapListMapToList(List<Map<String, Object>> dataList) {
        List<List<String>> data = new ArrayList<>();//  [["1","4"],[33,666]]
        for (Map<String, Object> row : dataList) {
            List<String> rowData = new ArrayList<>();
            for (Map.Entry<String, Object> entry : row.entrySet()) {
                rowData.add(entry.getValue().toString());
            }
            data.add(rowData);
        }
        return data;
    }
dart 复制代码
    //前8行是空白
    public static Sheet convertDataListToSheets(List<Map<String, Object>> dataList) {
        Workbook workbook = new XSSFWorkbook();
        Sheet sheet = workbook.createSheet();

        // Insert 8 blank rows before starting the data
        for (int i = 0; i < 8; i++) {
            sheet.createRow(i);
        }

        // Populate sheet with data starting from the ninth row
        int rowIndex = 8; // Start from the ninth row
        for (Map<String, Object> data : dataList) {
            Row row = sheet.createRow(rowIndex++);
            int cellIndex = 0;
            for (Map.Entry<String, Object> entry : data.entrySet()) {
                Cell cell = row.createCell(cellIndex++);
                setCellValue(cell, entry.getValue());
            }
        }

        return sheet;
    }

//前8行是空白 第九行第一列去掉不读

dart 复制代码
    public static Sheet convertDataListToSheetRemoveNineAndOne(List<Map<String, Object>> dataList) {
        Workbook workbook = new XSSFWorkbook();
        Sheet sheet = workbook.createSheet();

        // Insert 8 blank rows before starting the data
        for (int i = 0; i < 8; i++) {
            sheet.createRow(i);
        }

        // Populate sheet with data starting from the ninth row
        int rowIndex = 8; // Start from the ninth row
        for (Map<String, Object> data : dataList) {
            Row row = sheet.createRow(rowIndex++);
            int cellIndex = 0;
            for (Map.Entry<String, Object> entry : data.entrySet()) {
                Cell cell = row.createCell(cellIndex++);
                setCellValue(cell, entry.getValue());
            }
        }

        // Remove the first cell of the ninth row (index 8)
        if (sheet.getRow(8) != null && sheet.getRow(8).getCell(0) != null) {
            sheet.getRow(8).removeCell(sheet.getRow(8).getCell(0));
        }

        return sheet;
    }

    private static void setCellValue(Cell cell, Object value) {
        if (value instanceof String) {
            cell.setCellValue((String) value);
        } else if (value instanceof Number) {
            cell.setCellValue(((Number) value).doubleValue());
        } else if (value instanceof Boolean) {
            cell.setCellValue((Boolean) value);
        } else if (value instanceof java.util.Date) {
            cell.setCellValue((java.util.Date) value);
        } else {
            cell.setCellValue(value != null ? value.toString() : "");
        }
    }
dart 复制代码
    private List<List<String>> wrapListMapToList(List<Map<String, Object>> dataList) {
        List<List<String>> data = new ArrayList<>();//  [["1","4"],[33,666]]
        for (Map<String, Object> row : dataList) {
            List<String> rowData = new ArrayList<>();
            for (Map.Entry<String, Object> entry : row.entrySet()) {
                rowData.add(entry.getValue().toString());
            }
            data.add(rowData);
        }
        return data;
    }
相关推荐
默 语8 分钟前
MySQL中的数据去重,该用DISTINCT还是GROUP BY?
java·数据库·mysql·distinct·group by·1024程序员节·数据去重
oDeviloo2 小时前
新版IntelliJ IDEA个性化设置兼容老版习惯
java·ide·intellij-idea
一只小透明啊啊啊啊2 小时前
Java Web 开发的核心组件:Servlet, JSP,Filter,Listener
java·前端·servlet
spencer_tseng3 小时前
Eclipse Uninstall Software
java·ide·eclipse
嗯、.3 小时前
使用 iText 9 为 PDF 添加文字水印的完整实战
java·pdf·itext
怪兽20143 小时前
缓存雪崩、缓存穿透、缓存预热、缓存更新、缓存降级等问题
java·缓存·面试
皮皮林5514 小时前
Java 25 正式发布:更简洁、更高效、更现代!
java
源码_V_saaskw4 小时前
JAVA国际版二手交易系统手机回收好物回收发布闲置商品系统源码支持APP+H5
java·开发语言·微信·智能手机·微信小程序·小程序
جيون داد ناالام ميづ4 小时前
Spring AOP核心原理分析
java·数据库·spring
霸道流氓气质4 小时前
SpringBoot+MybatisPlus+自定义注解+切面实现水平数据隔离功能(附代码下载)
java·spring boot·后端