POI导入导出工具类

痛定思痛。 2023-06-15 07:11 24阅读 0赞

## 导入POI依赖 ##

<dependency>
                <groupId>org.apache.poi</groupId>
                <artifactId>poi</artifactId>
                <version>3.17</version>
            </dependency>
            <dependency>
                <groupId>org.apache.poi</groupId>
                <artifactId>poi-ooxml</artifactId>
                <version>3.17</version>
            </dependency>
            <dependency>
                <groupId>org.apache.poi</groupId>
                <artifactId>poi-ooxml-schemas</artifactId>
                <version>3.17</version>
            </dependency>

## Excel导入工具类 ##

import org.apache.commons.lang.time.DateUtils;
    import org.apache.poi.hssf.usermodel.*;
    import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
    import org.apache.poi.ss.usermodel.*;
    
    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.io.InputStream;
    import java.lang.reflect.Field;
    import java.lang.reflect.InvocationTargetException;
    import java.lang.reflect.Method;
    import java.text.SimpleDateFormat;
    import java.util.*;
    
    
    
    public class ExcelReadUtil<T> { 
    
        /** * 这是一个通用的方法，利用了JAVA的反射机制，可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出 * * title 表格标题名 * headersName 表格属性列名数组 * headersId 表格属性列名对应的字段---你需要导出的字段名（为了更灵活控制你想要导出的字段） * dtoList 需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象 * out 与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中 */
        public   byte[] exportExcel(String title, List<String> headersName,List<String> headersId,
                                    List<T> dtoList) { 
            /*（一）表头--标题栏*/
            Map<Integer, String> headersNameMap = new HashMap<>();
            int key=0;
            for (int i = 0; i < headersName.size(); i++) { 
                if (!headersName.get(i).equals(null)) { 
                    headersNameMap.put(key, headersName.get(i));
                    key++;
                }
            }
            /*（二）字段*/
            Map<Integer, String> titleFieldMap = new HashMap<>();
            int value = 0;
            for (int i = 0; i < headersId.size(); i++) { 
                if (!headersId.get(i).equals(null)) { 
                    titleFieldMap.put(value, headersId.get(i));
                    value++;
                }
            }
            /* （三）声明一个工作薄：包括构建工作簿、表格、样式*/
            HSSFWorkbook wb = new HSSFWorkbook();
            HSSFSheet sheet = wb.createSheet(title);
            sheet.setDefaultColumnWidth((short)15);
            // 生成一个样式
            HSSFCellStyle style = wb.createCellStyle();
            HSSFRow row = sheet.createRow(0);
            // style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
            HSSFCell cell;
            Collection c = headersNameMap.values();//拿到表格所有标题的value的集合
            Iterator<String> it = c.iterator();//表格标题的迭代器
            /*（四）导出数据：包括导出标题栏以及内容栏*/
            //根据选择的字段生成表头
            short size = 0;
            while (it.hasNext()) { 
                cell = row.createCell(size);
                cell.setCellValue(it.next().toString());
                cell.setCellStyle(style);
                size++;
            }
            //表格标题一行的字段的集合
            Collection zdC = titleFieldMap.values();
            Iterator<T> labIt = dtoList.iterator();//总记录的迭代器
            int zdRow =0;//列序号
            while (labIt.hasNext()) { //记录的迭代器，遍历总记录
                int zdCell = 0;
                zdRow++;
                row = sheet.createRow(zdRow);
                T l = (T) labIt.next();
                // 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
                Field[] fields = l.getClass().getDeclaredFields();//获得JavaBean全部属性
                for (short i = 0; i < fields.length; i++) { //遍历属性，比对
                    Field field = fields[i];
                    String fieldName = field.getName();//属性名
                    Iterator<String> zdIt = zdC.iterator();//一条字段的集合的迭代器
                    while (zdIt.hasNext()) { //遍历要导出的字段集合
                        if (zdIt.next().equals(fieldName)) { //比对JavaBean的属性名，一致就写入，不一致就丢弃
                            String getMethodName = "get"
                                    + fieldName.substring(0, 1).toUpperCase()
                                    + fieldName.substring(1);//拿到属性的get方法
                            Class tCls = l.getClass();//拿到JavaBean对象
                            try { 
                                Method getMethod = tCls.getMethod(getMethodName,
                                        new Class[] { });//通过JavaBean对象拿到该属性的get方法，从而进行操控
                                Object val = getMethod.invoke(l, new Object[] { });//操控该对象属性的get方法，从而拿到属性值
                                String textVal = null;
                                if (val!= null) { 
                                    textVal = String.valueOf(val);//转化成String
                                }else{ 
                                    textVal = null;
                                }
                                row.createCell((short) zdCell).setCellValue(textVal);//写进excel对象
                                zdCell++;
                            } catch (SecurityException e) { 
                                e.printStackTrace();
                            } catch (IllegalArgumentException e) { 
                                e.printStackTrace();
                            } catch (NoSuchMethodException e) { 
                                e.printStackTrace();
                            } catch (IllegalAccessException e) { 
                                e.printStackTrace();
                            } catch (InvocationTargetException e) { 
                                e.printStackTrace();
                            }
                        }
                    }
                }
            }
            return wb.getBytes();
        }
        /** * Excel读取 操作 */
        public static List<List<String>> readExcel(InputStream is) throws IOException { 
            Workbook wb = null;
            SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd");
            try { 
                wb = WorkbookFactory.create(is);
            } catch (FileNotFoundException e) { 
                e.printStackTrace();
            } catch (InvalidFormatException e) { 
                e.printStackTrace();
            } catch (IOException e) { 
                e.printStackTrace();
            }
    
            /** 得到第一个sheet */
            Sheet sheet = wb.getSheetAt(0);
            /** 得到Excel的行数 */
            int totalRows = sheet.getPhysicalNumberOfRows();
    
            /** 得到Excel的列数 */
            int totalCells = 0;
            if (totalRows >= 1 && sheet.getRow(0) != null) { 
                totalCells = sheet.getRow(0).getPhysicalNumberOfCells();
            }
    
            List<List<String>> dataLst = new ArrayList<List<String>>();
            /** 循环Excel的行 */
            for (int r = 0; r < totalRows; r++) { 
                Row row = sheet.getRow(r);
                if (row == null) continue;
                if (isRowEmpty(row)) continue; //过滤空行
                List<String> rowLst = new ArrayList<String>();
                /** 循环Excel的列 */
                for (int c = 0; c < totalCells; c++) { 
                    Cell cell = row.getCell(c);
                    String cellValue = "";
                    if (null != cell) { 
                         /*HSSFDataFormatter hSSFDataFormatter = new HSSFDataFormatter(); cellValue= hSSFDataFormatter.formatCellValue(cell);*/
    
    
                        // 以下是判断数据的类型
                        CellType type = cell.getCellTypeEnum();
    
                        switch (type) { 
                            case NUMERIC: // 数字
                                cellValue = cell.getNumericCellValue() + "";
                                //转换时间格式
                                if (r != 0 && c == 7) { 
                                    Date date = dateFormat(cellValue.substring(0, cellValue.length() - 2));
    // System.out.println(date);
                                    cellValue = sf.format(date);
                                }
                                //校验整数
                                if (r != 0 && c == 6) { 
                                    if (cellValue.contains(".")) { 
                                        int i = cellValue.indexOf(".");
                                        cellValue = cellValue.substring(0, i);
                                    }
    
                                }
                                break;
                            case STRING: // 字符串
                                cellValue = cell.getStringCellValue();
                                break;
                            case BOOLEAN: // Boolean
                                cellValue = cell.getBooleanCellValue() + "";
                                break;
                            case FORMULA: // 公式
                                try { 
                                    cellValue = cell.getStringCellValue();
                                } catch (IllegalStateException e) { 
                                    cellValue = String.valueOf(cell.getNumericCellValue());
                                }
                                break;
                           /* cellValue = cell.getCellFormula() + ""; break;*/
                            case BLANK: // 空值
                                cellValue = "";
                                break;
                            case _NONE: // 故障
                                cellValue = "非法字符";
                                break;
                            default:
                                cellValue = "未知类型";
                                break;
                        }
                    }
    
                    rowLst.add(cellValue);
                }
                /** 保存第r行的第c列 */
                dataLst.add(rowLst);
            }
            return dataLst;
        }
    
    
        //时间转换方法 传取出来的时间数字
        public static Date dateFormat(String conStart1) { 
            Calendar calendar = new GregorianCalendar(1900, 0, -1);
            Date d = calendar.getTime();
            Date dd = DateUtils.addDays(d, Integer.valueOf(conStart1));
            return dd;
        }
    
        //判断是否空行
        private static boolean isRowEmpty(Row row) { 
            for (int c = row.getFirstCellNum(); c < row.getLastCellNum(); c++) { 
                Cell cell = row.getCell(c);
                if (cell != null && cell.getCellType() != Cell.CELL_TYPE_BLANK)
                    return false;
            }
            return true;
        }
    
    }

**调用例子**

/** * excel数据 批量插入 * * @param file * @param cusId * @return */
        @RequestMapping("/addBatchDevice")
        @ResponseBody
        @CrossOrigin
        public ObjectRestResponse addBatchDevice(MultipartFile file, @RequestParam String cusId) { 
            ObjectRestResponse response = new ObjectRestResponse();
            int i = 0;
    
            try { 
                //读取excel表格
                List<List<String>> lists = ExcelUtil.readExcel(file.getInputStream());
    // System.out.println(lists);
                i = mangeService.addBatchFarmDevice(lists, cusId);
                response.setData(i);
            } catch (IOException e) { 
                e.printStackTrace();
            }
    
            return response;
        }

## 导出工具类（xls方式和xlsx方式） ##

import org.apache.poi.hssf.usermodel.HSSFCellStyle;
    import org.apache.poi.hssf.usermodel.HSSFFont;
    import org.apache.poi.hssf.usermodel.HSSFPalette;
    import org.apache.poi.hssf.usermodel.HSSFWorkbook;
    import org.apache.poi.hssf.util.HSSFColor;
    import org.apache.poi.ss.usermodel.*;
    import org.apache.poi.ss.util.CellRangeAddress;
    import org.apache.poi.xssf.streaming.SXSSFWorkbook;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    import javax.servlet.http.HttpServletResponse;
    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.OutputStream;
    import java.lang.reflect.Method;
    import java.net.URLEncoder;
    import java.text.DecimalFormat;
    import java.text.SimpleDateFormat;
    import java.util.Date;
    import java.util.List;
    
    
    
    
    
    
    public class ExcelExport { 
        private static final Logger logger = LoggerFactory.getLogger(ExcelExport.class);
        HttpServletResponse response;
        // 文件名
        private String fileName;
        //文件保存路径
        private String fileDir;
        //sheet名
        private String sheetName;
        //表头字体
        private String titleFontType = "Arial Unicode MS";
        //表头背景色
        private String titleBackColor = "C1FBEE";
        //表头字号
        private short titleFontSize = 12;
        //添加自动筛选的列 如 A:M
        private String address = "";
        //正文字体
        private String contentFontType = "Arial Unicode MS";
        //正文字号
        private short contentFontSize = 12;
        //Float类型数据小数位
        private String floatDecimal = "0.00";
        //Double类型数据小数位
        private String doubleDecimal = "0.00";
        //设置列的公式
        private String colFormula[] = null;
    
        DecimalFormat floatDecimalFormat = new DecimalFormat(floatDecimal);
        DecimalFormat doubleDecimalFormat = new DecimalFormat(doubleDecimal);
    
        private HSSFWorkbook workbook = null;
    
        public ExcelExport() { 
    
        }
    
        public ExcelExport(String fileDir, String sheetName) { 
            this.fileDir = fileDir;
            this.sheetName = sheetName;
            workbook = new HSSFWorkbook();
        }
    
        public ExcelExport(HttpServletResponse response, String fileName, String sheetName) { 
            this.fileName = fileName;
            this.response = response;
            this.sheetName = sheetName;
            workbook = new HSSFWorkbook();
        }
    
        /** * 设置表头字体. * * @param titleFontType */
        public void setTitleFontType(String titleFontType) { 
            this.titleFontType = titleFontType;
        }
    
        /** * 设置表头背景色. * * @param titleBackColor 十六进制 */
        public void setTitleBackColor(String titleBackColor) { 
            this.titleBackColor = titleBackColor;
        }
    
        /** * 设置表头字体大小. * * @param titleFontSize */
        public void setTitleFontSize(short titleFontSize) { 
            this.titleFontSize = titleFontSize;
        }
    
        /** * 设置表头自动筛选栏位,如A:AC. * * @param address */
        public void setAddress(String address) { 
            this.address = address;
        }
    
        /** * 设置正文字体. * * @param contentFontType */
        public void setContentFontType(String contentFontType) { 
            this.contentFontType = contentFontType;
        }
    
        /** * 设置正文字号. * * @param contentFontSize */
        public void setContentFontSize(short contentFontSize) { 
            this.contentFontSize = contentFontSize;
        }
    
        /** * 设置float类型数据小数位 默认.00 * * @param doubleDecimal 如 ".00" */
        public void setDoubleDecimal(String doubleDecimal) { 
            this.doubleDecimal = doubleDecimal;
        }
    
        /** * 设置doubel类型数据小数位 默认.00 * * @param floatDecimalFormat 如 ".00 */
        public void setFloatDecimalFormat(DecimalFormat floatDecimalFormat) { 
            this.floatDecimalFormat = floatDecimalFormat;
        }
    
        /** * 设置列的公式 * * @param colFormula 存储i-1列的公式 涉及到的行号使用@替换 如A@+B@ */
        public void setColFormula(String[] colFormula) { 
            this.colFormula = colFormula;
        }
    
        /** * 写excel. * xls方式 * * @param titleColumn 对应bean的属性名 * @param titleName excel要导出的列名 * @param titleSize 列宽 * @param dataList 数据 */
        public void writeExcel(String titleColumn[], String titleName[], int titleSize[], List<?> dataList) { 
            //添加Worksheet（不添加sheet时生成的xls文件打开时会报错)
            Sheet sheet = workbook.createSheet(this.sheetName);
            //新建文件
            OutputStream out = null;
            try { 
                if (fileDir != null) { 
                    //有文件路径
                    out = new FileOutputStream(fileDir);
                } else { 
                    //否则，直接写到输出流中
                    out = response.getOutputStream();
                    fileName = fileName + ".xls";
                    response.setContentType("application/msexcel;charset=UTF-8");
                    response.setHeader("Content-Disposition", "attachment; filename="
                            + URLEncoder.encode(fileName, "UTF-8"));
                }
    
                //写入excel的表头
                Row titleNameRow = workbook.getSheet(sheetName).createRow(0);
                //设置样式
                CellStyle titleStyle = workbook.createCellStyle();
                titleStyle = (HSSFCellStyle) setFontAndBorder(titleStyle, titleFontType, (short) titleFontSize);
                titleStyle = (HSSFCellStyle) setColor(titleStyle, titleBackColor, (short) 10);
    
                for (int i = 0; i < titleName.length; i++) { 
                    sheet.setColumnWidth(i, titleSize[i] * 256);    //设置宽度
                    Cell cell = titleNameRow.createCell(i);
                    cell.setCellStyle(titleStyle);
                    cell.setCellValue(titleName[i].toString());
                }
    
                //为表头添加自动筛选
                if (!"".equals(address)) { 
                    CellRangeAddress c = (CellRangeAddress) CellRangeAddress.valueOf(address);
                    sheet.setAutoFilter(c);
                }
    
                //通过反射获取数据并写入到excel中
                if (dataList != null && dataList.size() > 0) { 
                    //设置样式
                    HSSFCellStyle dataStyle = workbook.createCellStyle();
                    titleStyle = (HSSFCellStyle) setFontAndBorder(titleStyle, contentFontType, (short) contentFontSize);
    
                    if (titleColumn.length > 0) { 
                        for (int rowIndex = 1; rowIndex <= dataList.size(); rowIndex++) { 
                            Object obj = dataList.get(rowIndex - 1);     //获得该对象
                            Class clsss = obj.getClass();     //获得该对对象的class实例
                            Row dataRow = workbook.getSheet(sheetName).createRow(rowIndex);
                            for (int columnIndex = 0; columnIndex < titleColumn.length; columnIndex++) { 
                                String title = titleColumn[columnIndex].toString().trim();
                                if (!"".equals(title)) {   //字段不为空
                                    //使首字母大写
                                    String UTitle = Character.toUpperCase(title.charAt(0)) + title.substring(1, title.length()); // 使其首字母大写;
                                    String methodName = "get" + UTitle;
    
                                    // 设置要执行的方法
                                    Method method = clsss.getDeclaredMethod(methodName);
    
                                    //获取返回类型
                                    String returnType = method.getReturnType().getName();
                                    Object object = method.invoke(obj);
                                    String data = method.invoke(obj) == null ? "" : object.toString();
                                    Cell cell = dataRow.createCell(columnIndex);
                                    if (data != null && !"".equals(data)) { 
                                        if ("int".equals(returnType)) { 
                                            cell.setCellValue(Integer.parseInt(data));
                                        } else if ("long".equals(returnType)) { 
                                            cell.setCellValue(Long.parseLong(data));
                                        } else if ("float".equals(returnType)) { 
                                            cell.setCellValue(floatDecimalFormat.format(Float.parseFloat(data)));
                                        } else if ("double".equals(returnType)) { 
                                            cell.setCellValue(doubleDecimalFormat.format(Double.parseDouble(data)));
                                        } else if (Date.class.getName().equals(returnType)) { 
                                            cell.setCellValue(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(object));
                                        } else { 
                                            cell.setCellValue(data);
                                        }
                                    }
                                } else {    //字段为空 检查该列是否是公式
                                    if (colFormula != null) { 
                                        String sixBuf = colFormula[columnIndex].replace("@", (rowIndex + 1) + "");
                                        Cell cell = dataRow.createCell(columnIndex);
                                        cell.setCellFormula(sixBuf);
                                    }
                                }
                            }
                        }
                    }
                }
                workbook.write(out);
            } catch (Exception e) { 
                e.printStackTrace();
            } finally { 
                if (out != null) { 
                    try { 
                        out.close();
                    } catch (IOException e) { 
                        logger.debug("导出写Excel异常");
                    }
                }
            }
        }
    
    
        /** * xlsx方式 * * @param response * @param fileName * @param titleColumn * @param titleName * @param titleSize * @param dataList */
        public void writeBigExcel(HttpServletResponse response, String fileName, String titleColumn[],
                                  String titleName[], int titleSize[], List<?> dataList) { 
            try { 
                SXSSFWorkbook workbook = new SXSSFWorkbook(100);
                OutputStream out = response.getOutputStream();
                String lastFileName = fileName + ".xlsx";
                response.setContentType("application/msexcel;charset=UTF-8");
                response.setHeader("Content-Disposition", "attachment; filename="
                        + URLEncoder.encode(lastFileName, "UTF-8"));
                int k = 0;
                int rowIndex;
                Sheet sheet = workbook.createSheet(fileName + (k + 1));
                //写入excel的表头
                Row titleNameRow = workbook.getSheet(fileName + (k + 1)).createRow(0);
                for (int i = 0; i < titleName.length; i++) { 
                    sheet.setColumnWidth(i, titleSize[i] * 256);    //设置宽度
                    Cell cell = titleNameRow.createCell(i);
                    cell.setCellValue(titleName[i]);
                }
                //写入到excel中
                if (dataList != null && dataList.size() > 0) { 
                    if (titleColumn.length > 0) { 
                        for (int index = 0; index < dataList.size(); index++) { 
                            //每个sheet3W条数据
                            if (index != 0 && (index) % 30000 == 0) { 
                                k = k + 1;
                                sheet = workbook.createSheet(fileName + (k + 1));
                                //写入excel的表头
                                titleNameRow = workbook.getSheet(fileName + (k + 1)).createRow(0);
                                for (int i = 0; i < titleName.length; i++) { 
                                    sheet.setColumnWidth(i, titleSize[i] * 256);    //设置宽度
                                    Cell cell = titleNameRow.createCell(i);
                                    cell.setCellValue(titleName[i]);
                                }
                            }
                            if (index < 30000) { 
                                rowIndex = index + 1;
                            } else { 
                                rowIndex = index - 30000 * ((index) / 30000) + 1;
                            }
                            Object obj = dataList.get(index);
                            Class clazz = obj.getClass();
                            Row dataRow = workbook.getSheet(fileName + (k + 1)).createRow(rowIndex);
                            for (int columnIndex = 0; columnIndex < titleColumn.length; columnIndex++) { 
                                String title = titleColumn[columnIndex].trim();
                                if (!"".equals(title)) { 
                                    // 获取返回类型
                                    String UTitle = Character.toUpperCase(title.charAt(0)) + title.substring(1, title.length()); // 使其首字母大写;
                                    String methodName = "get" + UTitle;
                                    Method method = clazz.getDeclaredMethod(methodName);
                                    String returnType = method.getReturnType().getName();
                                    Object object = method.invoke(obj);
                                    String data = method.invoke(obj) == null ? "" : object.toString();
                                    Cell cell = dataRow.createCell(columnIndex);
                                    if (data != null && !"".equals(data)) { 
                                        if ("int".equals(returnType)) { 
                                            cell.setCellValue(Integer.parseInt(data));
                                        } else if ("long".equals(returnType)) { 
                                            cell.setCellValue(Long.parseLong(data));
                                        } else if ("float".equals(returnType)) { 
                                            cell.setCellValue(new DecimalFormat("0.00").format(Float.parseFloat(data)));
                                        } else if ("double".equals(returnType)) { 
                                            cell.setCellValue(new DecimalFormat("0.00").format(Double.parseDouble(data)));
                                        } else if (Date.class.getName().equals(returnType)) { 
                                            cell.setCellValue(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(object));
                                        } else { 
                                            cell.setCellValue(data);
                                        }
                                    } else {    //字段为空 检查该列是否是公式
                                        if (colFormula != null) { 
                                            String sixBuf = colFormula[columnIndex].replace("@", (rowIndex + 1) + "");
                                            cell = dataRow.createCell(columnIndex);
                                            cell.setCellFormula(sixBuf);
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
                workbook.write(out);
                out.flush();
                out.close();
            } catch (Exception e) { 
                e.printStackTrace();
            }
        }
    
        /** * 将16进制的颜色代码写入样式中来设置颜色 * * @param style 保证style统一 * @param color 颜色：66FFDD * @param index 索引 8-64 使用时不可重复 * @return */
        public CellStyle setColor(CellStyle style, String color, short index) { 
            if ("".equals(color)) { 
                //转为RGB码
                int r = Integer.parseInt((color.substring(0, 2)), 16);   //转为16进制
                int g = Integer.parseInt((color.substring(2, 4)), 16);
                int b = Integer.parseInt((color.substring(4, 6)), 16);
                //自定义cell颜色
                HSSFPalette palette = workbook.getCustomPalette();
                palette.setColorAtIndex((short) index, (byte) r, (byte) g, (byte) b);
    
                style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
                style.setFillForegroundColor(index);
            }
            return style;
        }
    
        /** * 设置字体并加外边框 * * @param style 样式 * @param style 字体名 * @param style 大小 * @return */
        public CellStyle setFontAndBorder(CellStyle style, String fontName, short size) { 
            HSSFFont font = workbook.createFont();
            font.setFontHeightInPoints(size);
            font.setFontName(fontName);
            font.setBold(true);//是否加粗
            style.setFont(font);
            style.setBorderBottom(BorderStyle.THIN); //下边框
            style.setBorderLeft(BorderStyle.THIN);//左边框
            style.setBorderTop(BorderStyle.THIN);//上边框
            style.setBorderRight(BorderStyle.THIN);//右边框
            style.setFillForegroundColor(HSSFColor.RED.index);// 设置背景色
            return style;
        }
    
    
    
    }

## 调用例子 ##

**导出xls**

/** * 导出Excel所有 * * @param response */
        @Override
        public void exportExcel(HttpServletResponse response, Long companyId) { 
            List<EpcSystemDictionary> epcSystemDictionaryList = epcSystemDictionaryMapper.getAll(companyId);
            ExcelExport excelExport = new ExcelExport(response, "数据字典总数据", "sheet1");
            excelExport.writeExcel(new String[]{ "code", "name", "enName", "level", "sort"}
                    , new String[]{ "编号", "名称", "英文名称", "层级", "排序"}
                    , new int[]{ 30, 30, 30, 30, 30}, epcSystemDictionaryList);
        }

**导出xlsx**

/** * excel数据 牧场数据导出 * * @param cusId * @return */
        @GetMapping("/export")
        @ResponseBody
        @CrossOrigin
        public void export(@RequestParam String cusId, HttpServletResponse response) { 
            if (cusId == null || cusId.isEmpty()) { 
                throw new BusinessException("cusId不能为空");
            }
            List<FarmDevice> list = mangeMapper.findFarmDeviceByCusId(cusId);
            if (list.size() > 0) { 
                ExcelExport excelExport = new ExcelExport();
                String title = "牧场数据导出Excel";
                String[] titleColumn = { "farmName", "farmContactName"}; //该牧场名称对应的属性farmName
                String[] titleName = { "牧场名称", "牧场主"}; //表头，列名
                int[] titleSize = { 20, 20};
                excelExport.writeBigExcel(response, title, titleColumn, titleName, titleSize, list);
            } else { 
                log.info("该客户下没有牧场！");
            }
    
        }

相关链接：  
[https://www.jianshu.com/p/9fd84f1ce725][https_www.jianshu.com_p_9fd84f1ce725]  
[https://blog.csdn.net/kxj19980524/article/details/93121012][https_blog.csdn.net_kxj19980524_article_details_93121012]

[https_www.jianshu.com_p_9fd84f1ce725]: https://www.jianshu.com/p/9fd84f1ce725
[https_blog.csdn.net_kxj19980524_article_details_93121012]: https://blog.csdn.net/kxj19980524/article/details/93121012