SpringBoot集成EasyPoi(Excel导入导出)

以你之姓@ 2022-05-21 09:53 511阅读 0赞

1.导入jar包

<dependency>
                <groupId>cn.afterturn</groupId>
                <artifactId>easypoi-base</artifactId>
                <version>3.0.3</version>
            </dependency>
            <dependency>
                <groupId>cn.afterturn</groupId>
                <artifactId>easypoi-web</artifactId>
                <version>3.0.3</version> </dependency>
            <dependency>
                <groupId>cn.afterturn</groupId>
                <artifactId>easypoi-annotation</artifactId>
                <version>3.0.3</version>
            </dependency>
            
    
            <dependency>
                <groupId>commons-fileupload</groupId>
                <artifactId>commons-fileupload</artifactId>
                <version>1.3.1</version>
            </dependency>

2.导入工具类（官网和百度都有）

package com.zzf.finals.utiles;
    
    import cn.afterturn.easypoi.excel.ExcelExportUtil;
    import cn.afterturn.easypoi.excel.ExcelImportUtil;
    import cn.afterturn.easypoi.excel.entity.ExportParams;
    import cn.afterturn.easypoi.excel.entity.ImportParams;
    import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
    import org.apache.commons.lang3.StringUtils;
    import org.apache.poi.ss.usermodel.Workbook;
    import org.springframework.web.multipart.MultipartFile;
    
    import javax.servlet.http.HttpServletResponse;
    import java.io.File;
    import java.io.IOException;
    import java.net.URLEncoder;
    import java.util.List;
    import java.util.Map;
    import java.util.NoSuchElementException;
    
    public class ExcelUtiles {
        public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass,
                                       String fileName, boolean isCreateHeader, HttpServletResponse response){
            ExportParams exportParams = new ExportParams(title, sheetName);
            exportParams.setCreateHeadRows(isCreateHeader);
            defaultExport(list, pojoClass, fileName, response, exportParams);
        }
    
        public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass,String fileName,
                                       HttpServletResponse response){
            defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
        }
    
        public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response){
            defaultExport(list, fileName, response);
        }
    
        private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName,
                                          HttpServletResponse response, ExportParams exportParams) {
            Workbook workbook = ExcelExportUtil.exportExcel(exportParams,pojoClass,list);
            if (workbook != null); downLoadExcel(fileName, response, workbook);
        }
    
        private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
            try {
                response.setCharacterEncoding("UTF-8");
                response.setHeader("content-Type", "application/vnd.ms-excel");
                response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
                workbook.write(response.getOutputStream());
            } catch (IOException e) {
                //throw new NormalException(e.getMessage());
            }
        }
    
        private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
            Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
            if (workbook != null);
            downLoadExcel(fileName, response, workbook);
        }
    
        public static <T> List<T> importExcel(String filePath,Integer titleRows,Integer headerRows, Class<T> pojoClass){
            if (StringUtils.isBlank(filePath)){
                return null;
            }
            ImportParams params = new ImportParams();
            params.setTitleRows(titleRows);
            params.setHeadRows(headerRows);
            List<T> list = null;
            try {
                list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
            }catch (NoSuchElementException e){
                //throw new NormalException("模板不能为空");
            } catch (Exception e) {
                e.printStackTrace();
                //throw new NormalException(e.getMessage());
            } return list;
        }
    
            public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> pojoClass){
            if (file == null){ return null;
            }
            ImportParams params = new ImportParams();
            params.setTitleRows(titleRows);
            params.setHeadRows(headerRows);
            List<T> list = null;
            try {
                list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
            }catch (NoSuchElementException e){
               // throw new NormalException("excel文件不能为空");
            } catch (Exception e) {
                //throw new NormalException(e.getMessage());
                System.out.println(e.getMessage());
            }
            return list;
        }
    
    }

3.编写实体映射类

package com.zzf.finals.entity;
    
    import cn.afterturn.easypoi.excel.annotation.Excel;
    import lombok.Data;
    import org.springframework.format.annotation.DateTimeFormat;
    
    import javax.persistence.*;
    import java.util.Date;
    
    @Entity
    @Table(name = "seckill")
    public class DemoExcel {
    
        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        @Excel(name = "id" ,orderNum = "0")
        private Long seckillId;
    
        @Column(name = "name")
        @Excel(name = "姓名" ,orderNum = "1")
        private String name;
    
        @Column(name = "number")
        @Excel(name = "数量" ,orderNum = "2")
        private int number;
    
        @Column(name = "start_time")
        @Excel(name = "开始日期" ,orderNum = "3",importFormat = "yyyy-MM-dd HH:mm:ss")//exportFormat = "yyyy-MM-dd HH:mm:ss")
        private Date startTime;
    
        @Column(name = "end_time")
        @Excel(name = "结束日期" ,orderNum = "4",importFormat = "yyyy-MM-dd HH:mm:ss")//exportFormat = "yyyy-MM-dd HH:mm:ss")
        private Date endTime;
    
        @Column(name = "create_time")
        @Excel(name = "创建日期" ,orderNum = "5",importFormat = "yyyy-MM-dd HH:mm:ss")//exportFormat = "yyyy-MM-dd HH:mm:ss")
        private Date createTime;
    
        public Long getSeckillId() {
            return seckillId;
        }
    
        public void setSeckillId(Long seckillId) {
            this.seckillId = seckillId;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public int getNumber() {
            return number;
        }
    
        public void setNumber(int number) {
            this.number = number;
        }
    
        public Date getStartTime() {
            return startTime;
        }
    
        public void setStartTime(Date startTime) {
            this.startTime = startTime;
        }
    
        public Date getEndTime() {
            return endTime;
        }
    
        public void setEndTime(Date endTime) {
            this.endTime = endTime;
        }
    
        public Date getCreateTime() {
            return createTime;
        }
    
        public void setCreateTime(Date createTime) {
            this.createTime = createTime;
        }
    
        @Override
        public String toString() {
            return "DemoExcel{" +
                    "seckillId=" + seckillId +
                    ", name='" + name + '\'' +
                    ", number=" + number +
                    ", startTime=" + startTime +
                    ", endTime=" + endTime +
                    ", createTime=" + createTime +
                    '}';
        }
    }

![70][]

![70 1][]

4.控制器代码

package com.zzf.finals.controller;
    
    import cn.afterturn.easypoi.excel.ExcelImportUtil;
    import cn.afterturn.easypoi.excel.entity.ImportParams;
    import cn.afterturn.easypoi.excel.entity.result.ExcelImportResult;
    import cn.afterturn.easypoi.handler.inter.IExcelDataHandler;
    import cn.afterturn.easypoi.util.PoiPublicUtil;
    import com.zzf.finals.entity.DemoExcel;
    import com.zzf.finals.repository.DemoExcelRepository;
    import com.zzf.finals.service.DemoService;
    import com.zzf.finals.utiles.ExcelUtiles;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.*;
    import org.springframework.web.multipart.MultipartFile;
    
    import javax.servlet.http.HttpServletResponse;
    import java.io.File;
    import java.io.IOException;
    import java.text.SimpleDateFormat;
    import java.util.List;
    import java.util.Map;
    
    @RestController
    @RequestMapping("/Excel")
    public class ExcelController {
    
        @Autowired
        private DemoExcelRepository demoExcelRepository;
    
        @Autowired
        private DemoService demoService;
    
        @GetMapping("/export")
        public void export(HttpServletResponse response) {
            System.out.println(1);
    //        模拟从数据库获取需要导出的数据
            List<DemoExcel> personList = demoExcelRepository.findAll();
    //         导出操作
            ExcelUtiles.exportExcel(personList, "测试名", "什么名字", DemoExcel.class, "测试.xls", response);
    
        }
    
        @PostMapping("/importExcel2")
        public void importExcel2(@RequestParam("file") MultipartFile file) {
            ImportParams importParams = new ImportParams();
            // 数据处理
            importParams.setHeadRows(1);
            importParams.setTitleRows(1);
    
            // 需要验证
            importParams.setNeedVerfiy(true);
    
            try {
                ExcelImportResult<DemoExcel> result = ExcelImportUtil.importExcelMore(file.getInputStream(), DemoExcel.class,
                        importParams);
    
                List<DemoExcel> successList = result.getList();
                for (DemoExcel demoExcel : successList) {
                  System.out.println(demoExcel);
                }
            } catch (IOException e) {
            } catch (Exception e) {
            }
        }
    }

![70 2][]

![70 3][]

输入连接后如图所示。

导入后如：

![70 4][]

最最最简单的导入导出就这么完成了。

修改自定义样式：

查看源码我发现他内部封装的是：

![70 5][]所以我们只需要设置这个样式就行了如：

public class ShelterIExcelExportStyler extends ExcelExportStylerDefaultImpl implements IExcelExportStyler{
    
    	
    	
    	public ShelterIExcelExportStyler(Workbook workbook) {
    		super(workbook);
    	}
    
        @Override
        public CellStyle getTitleStyle(short color) {
            CellStyle titleStyle = workbook.createCellStyle();
            titleStyle.setAlignment(CellStyle.ALIGN_CENTER);
            titleStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
            titleStyle.setWrapText(true);
            return titleStyle;
        }
    
        @Override
        public CellStyle stringSeptailStyle(Workbook workbook, boolean isWarp) {
            CellStyle style = workbook.createCellStyle();
            style.setAlignment(CellStyle.ALIGN_CENTER);
            style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
            style.setDataFormat(STRING_FORMAT);
            if (isWarp) {
                style.setWrapText(true);
            }
            return style;
        }
    
        @Override
        public CellStyle getHeaderStyle(short color) {
            CellStyle titleStyle = workbook.createCellStyle();
            Font font = workbook.createFont();
            font.setFontHeightInPoints((short) 20);
            titleStyle.setFont(font);
            titleStyle.setAlignment(CellStyle.ALIGN_CENTER);
            titleStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
            return titleStyle;
        }
    
        @Override
        public CellStyle stringNoneStyle(Workbook workbook, boolean isWarp) {
            CellStyle style = workbook.createCellStyle();
            Font font = workbook.createFont();
    //        font.setFontHeightInPoints((short) 15);
            style.setFont(font);
            style.setAlignment(CellStyle.ALIGN_CENTER);
            style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
            style.setDataFormat(STRING_FORMAT);
            
            if (isWarp) {
                style.setWrapText(true);
            }
            return style;
        }
    
    
    }

这里我只是简单的修改了他默认字体大小。如果要设置表格的宽度不可以在这里设置。

![70 6][]

private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName,
                                          HttpServletResponse response, ExportParams exportParams, String sheetName) {
            Workbook workbook = ExcelExportUtil.exportExcel(exportParams,pojoClass,list);
            Sheet sheet=workbook.getSheet(sheetName);
    //        sheet.CreateRow(0).Height = (short)(200*20);
           // sheet.createRow(0);
            sheet.getRow(0).setHeight((short)(50*20));
            sheet.getRow(1).setHeight((short)(30*20));
            if (workbook != null); downLoadExcel(fileName, response, workbook);
        }

他会调用ExportExcel返回一个Workbook对象，然后通过这个对象获取Sheet才能改变行的宽度千万不腰用CreateRow会覆盖。

有些人会在使用导入的时候出现只导入一条数据或者列缺少的情况，个人推荐可以使用步进指令去调试这段代码改成适用自己的”轮子“。我通过调试发现保存数据是这个方法：

private <T> List<T> importExcel(Collection<T> result, Sheet sheet, Class<?> pojoClass, ImportParams params,
    			Map<String, PictureData> pictures) throws Exception {
    		List collection = new ArrayList();
    		Map<String, ExcelImportEntity> excelParams = new HashMap<String, ExcelImportEntity>();
    		List<ExcelCollectionParams> excelCollection = new ArrayList<ExcelCollectionParams>();
    		String targetId = null;
    		if (!Map.class.equals(pojoClass)) {
    			Field[] fileds = PoiPublicUtil.getClassFields(pojoClass);
    			ExcelTarget etarget = pojoClass.getAnnotation(ExcelTarget.class);
    			if (etarget != null) {
    				targetId = etarget.value();
    			}
    			getAllExcelField(targetId, fileds, excelParams, excelCollection, pojoClass, null, null);
    		}
    		Iterator<Row> rows = sheet.rowIterator();
    		for (int j = 0; j < params.getTitleRows(); j++) {
    			rows.next();
    		}
    		Map<Integer, String> titlemap = getTitleMap(rows, params, excelCollection);
    		checkIsValidTemplate(titlemap, excelParams, params, excelCollection);
    		Row row = null;
    		Object object = null;
    		String picId;
    		int readRow = 0;
    		// 跳过无效行
    		for (int i = 0; i < params.getStartRows(); i++) {
    			rows.next();
    		}
    		while (rows.hasNext()
    				&& (row == null || sheet.getLastRowNum() - row.getRowNum() > params.getLastOfInvalidRow())) {
    			if (params.getReadRows() > 0 && readRow > params.getReadRows()) {
    				break;
    			}
    			row = rows.next();
    			// Fix 如果row为无效行时候跳出
    			if (sheet.getLastRowNum() - row.getRowNum() < params.getLastOfInvalidRow()) {
    				break;
    			}
    			// 判断是集合元素还是不是集合元素,如果是就继续加入这个集合,不是就创建新的对象
    			// keyIndex 如果为空就不处理,仍然处理这一行
    			if (params.getKeyIndex() != null && !(row.getCell(params.getKeyIndex()) == null
    					|| StringUtils.isEmpty(getKeyValue(row.getCell(params.getKeyIndex())))) && object != null) {
    
    				for (ExcelCollectionParams param : excelCollection) {
    					addListContinue(object, param, row, titlemap, targetId, pictures, params);
    				}
    			} else {
    				object = PoiPublicUtil.createObject(pojoClass, targetId);
    				try {
    					// 标记为null的次数
    					int count = 0;
    					int sum = titlemap.size();
    					for (int i = row.getFirstCellNum(); i <= sum; i++) {
    						Cell cell = row.getCell(i);
    						boolean flag = true;
    						if (cell.getCellType() == HSSFCell.CELL_TYPE_BLANK) {
    							count++;
    							flag = false;
    						}
    						String titleString = (String) titlemap.get(i);
    						if (excelParams.containsKey(titleString) || Map.class.equals(pojoClass)) {
    							if (excelParams.get(titleString) != null && excelParams.get(titleString).getType() == 2) {
    								picId = row.getRowNum() + "_" + i;
    								saveImage(object, picId, excelParams, titleString, pictures, params);
    							} else {
    								if (saveFieldValue(params, object, cell, excelParams, titleString, row)) {
    									if (flag)//只有当没有count++过才能添加。
    										count++;
    								}
    							}
    						}
    					}
    
    					for (ExcelCollectionParams param : excelCollection) {
    						addListContinue(object, param, row, titlemap, targetId, pictures, params);
    					}
    					if (verifyingDataValidity(object, row, params, pojoClass)) {
    						// count等于0或者
    						if ((count == 0) || (count <= sum - 2))
    							collection.add(object);
    					} else {
    						// 如果为null的次数小于5则添加
    						// if (count!=0 || count < sum-3)
    						failCollection.add(object);
    					}
    				} catch (ExcelImportException e) {
    					LOGGER.error("excel import error , row num:{},obj:{}", readRow,
    							ReflectionToStringBuilder.toString(object));
    					if (!e.getType().equals(ExcelImportEnum.VERIFY_ERROR)) {
    						throw new ExcelImportException(e.getType(), e);
    					}
    				} catch (Exception e) {
    					LOGGER.error("excel import error , row num:{},obj:{}", readRow,
    							ReflectionToStringBuilder.toString(object));
    					throw new RuntimeException(e);
    				}
    			}
    			readRow++;
    		}
    		return collection;
    	}

这个类是![70 7][]

![70 8][]

修改的位置在这里，我通过修改这段代码使其强制进入else中可以拿到所有数据，然后判断null的次数选择是否添加。

![70 9][]

![70 10][]

适用自己的轮子才是最好的轮子……

文档地址：http://easypoi.mydoc.io/

参考：https://www.jianshu.com/p/5d67fb720ece

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