【VIP专享】java 导出excel 增量写入同一sheet

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Java导入导出excel，easypoi的简单使用

Java导⼊导出excel，easypoi的简单使⽤基于spring boot框架，先上pom配置<dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-base</artifactId><version>4.0.0</version></dependency><dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-web</artifactId><version>4.0.0</version></dependency><dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-annotation</artifactId><version>4.0.0</version></dependency>实体类package com.vo;import cn.afterturn.easypoi.excel.annotation.Excel;import com.baomidou.mybatisplus.annotation.TableName;import mon.data.entity.CurdEntity;@TableName("wx_user")public class User extends CurdEntity {@Excel(name = "姓名")String name;@Excel(name = "⽤户")String user;@Excel(name = "年龄")int groupValue;public int getGroupValue() {return groupValue;}public void setGroupValue(int groupValue) {this.groupValue = groupValue;}public String getName() {return name;}public void setName(String name) { = name;}public String getUser() {return user;}public void setUser(String user) {er = user;}}通⽤⽅法类package mon.util;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 ng3.StringUtils;import ermodel.Workbook;import org.springframework.web.multipart.MultipartFile;import javax.servlet.http.HttpServletResponse;import java.io.File;import java.io.IOException;import .URLEncoder;import java.util.List;import java.util.Map;import java.util.NoSuchElementException;/*** @Description: 表格⼯具类*/public class PoiUtils {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 RuntimeException(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);}/*** 导⼊* @param filePath* @param titleRows* @param headerRows* @param pojoClass* @param <T>* @return*/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 RuntimeException("模板不能为空");} catch (Exception e) {e.printStackTrace();throw new RuntimeException(e.getMessage());}return list;}/*** 导⼊表格* @param file* @param pojoClass* @param <T>* @return*/public static <T> List<T> importExcel(MultipartFile file, Class<T> pojoClass) {if (file == null) {return null;}ImportParams params = new ImportParams();try {List<T> list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);return list;} catch (NoSuchElementException e) {throw new RuntimeException("excel⽂件不能为空");} catch (Exception e) {throw new RuntimeException(e.getMessage());}}}接⼝调⽤相关⽅法，这⾥演⽰⼀下导⼊功能@PostMapping("excelList")//批量保存，⼀条保存失败，数据全部回滚，测试事务是否⽣效public MsgDataBody excelList(MultipartFile file){MsgDataBody<List<User>> msgBody = new MsgDataBody();msgBody.setCode(Constant.Error.getCode());msgBody.setMsg("导⼊失败");try {List<User> userList = PoiUtils.importExcel(file,User.class);/** 相关导⼊操作* */msgBody.setData(userList);msgBody.setCode(Constant.Success.getCode());msgBody.setMsg("导⼊失败");}catch (Exception e){msgBody.setMsg("导⼊失败["+e.getMessage()+"]");}return msgBody;}更多的easypoi教程可以看官⽹教程：。

Java中Easypoi实现excel多sheet表导入导出功能

Java中Easypoi实现excel多sheet表导⼊导出功能Easypoi简化了开发中对⽂档的导⼊导出实现，并不像poi那样都要写⼤段⼯具类来搞定⽂档的读写。

第⼀步引⼊Easypoi依赖<dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-spring-boot-starter</artifactId><version>4.2.0</version></dependency>Easypoi的注解使⽤说明（存留查看即可）第⼆步定义对应表格头数据对象实体类(注解的使⽤可以查阅上⾯的按需使⽤即可)@Setter@Getter@ToStringpublic class LoginCaseDto {@Excel(name = "flag(0是反向，1是正向)",orderNum = "1",width = 20)private String flag;@Excel(name = "urlid(访问id)",orderNum = "2",width = 20)private String urlid;@Excel(name = "name(登录账号)",orderNum = "3",width = 20)private String name;@Excel(name = "pwd(登录密码)",orderNum = "4",width = 20)private String pwd;@Excel(name = "desc(期望提⽰语)",orderNum = "5",width = 40)private String desc;@Excel(name = "actual(实际测试结果)",orderNum = "6",width = 40 )private String actual;@Excel(name = "urlpath(被测路径)",orderNum = "7",width = 40 )private String urlpath;}public class LoginUrlDto {@Excel(name = "id（访问测试类型）",orderNum = "1",width = 20)private String id;@Excel(name = "type(请求类型)",orderNum = "2",width = 20)private String type;@Excel(name = "url(访问地址)",orderNum = "3",width = 40)private String url;}第三步：封装Easypoi⼯具类（⽹上查了很多但是并不完整，这⾥补充下）关键封装⼯具类多sheet导⼊⽅法/*** 功能描述：根据接收的Excel⽂件来导⼊多个sheet,根据索引可返回⼀个集合* @param filePath 导⼊⽂件路径* @param sheetIndex 导⼊sheet索引* @param titleRows 表标题的⾏数* @param headerRows 表头⾏数* @param pojoClass Excel实体类* @return*/public static <T> List<T> importExcel(String filePath,int sheetIndex,Integer titleRows, Integer headerRows, Class<T> pojoClass) {// 根据file得到Workbook,主要是要根据这个对象获取,传过来的excel有⼏个sheet页ImportParams params = new ImportParams();// 第⼏个sheet页params.setStartSheetIndex(sheetIndex);params.setTitleRows(titleRows);params.setHeadRows(headerRows);List<T> list = null;try {list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);} catch (NoSuchElementException e) {throw new RuntimeException("模板不能为空");} catch (Exception e) {e.printStackTrace();}return list;}excel导⼊⽰例（直接传⼊sheet索引获取对应的sheet表）多sheet表导出⽅法使⽤(需要把导⼊的多sheet表数据转成list集合获取新数据后调⽤该⽅法重新写⼊)/*** 功能描述：把同⼀个表格多个sheet测试结果重新输出，如果后续增加多个List<Map<String, Object>>对象，需要后⾯继续追加* @ExcelEntiry sheet表格映射的实体对象* @return*/public static String exportSheet( Object...objects){Workbook workBook = null;try {// 创建参数对象（⽤来设定excel得sheet得内容等信息）ExportParams deptExportParams = new ExportParams();// 设置sheet得名称deptExportParams.setSheetName("登录⽤例");// 设置sheet表头名称deptExportParams.setTitle("测试⽤例");// 创建sheet1使⽤得mapMap<String, Object> deptExportMap = new HashMap<>();// title的参数为ExportParams类型，⽬前仅仅在ExportParams中设置了sheetNamedeptExportMap.put("title", deptExportParams);// 模版导出对应得实体类型deptExportMap.put("entity", LoginCaseDto.class);// sheet中要填充得数据deptExportMap.put("data", objects[0]);ExportParams empExportParams = new ExportParams();empExportParams.setTitle("被测RUL路径");empExportParams.setSheetName("被测url");// 创建sheet2使⽤得mapMap<String, Object> empExportMap = new HashMap<>();empExportMap.put("title", empExportParams);empExportMap.put("entity", LoginUrlDto.class);empExportMap.put("data", objects[1]);// 将sheet1、sheet2使⽤得map进⾏包装List<Map<String, Object>> sheetsList = new ArrayList<>();sheetsList.add(deptExportMap);sheetsList.add(empExportMap);// 执⾏⽅法workBook = EasyPoiUtil.exportExcel(sheetsList, ExcelType.HSSF);//String fileName = URLEncoder.encode("test", "UTF-8");String filepath = (String) LoadStaticConfigUtil.getCommonYml( "testcaseexcel.cases");FileOutputStream fos = new FileOutputStream(filepath);workBook.write(fos);fos.close();}catch (Exception e){e.printStackTrace();}finally {if(workBook != null) {try {workBook.close();} catch (IOException e) {e.printStackTrace();}}}return "success";}最后即可获取新的测试结果表格。

Java数据导入导出Excel

import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.util.ArrayList;import java.util.List;import jxl.Workbook;import jxl.format.UnderlineStyle;import bel;import jxl.write.WritableFont;import jxl.write.WritableSheet;import jxl.write.WritableWorkbook;import jxl.write.WriteException;import jxl.write.biff.RowsExceededException;import ermodel.HSSFCell;import ermodel.HSSFCellStyle;import ermodel.HSSFRow;import ermodel.HSSFSheet;import ermodel.HSSFWorkbook;import org.apache.poi.poifs.filesystem.POIFSFileSystem;public class ExcelOpt {/*** 生成一个Excel文件jxl* @param fileName 要生成的Excel文件名* @jxl.jar 版本：2.6*/public static void writeExcel(String fileName){WritableWorkbook wwb = null;try {//首先要使用Workbook类的工厂方法创建一个可写入的工作薄(Workbook)对象wwb = Workbook.createWorkbook(new File(fileName));} catch (IOException e) {e.printStackTrace();}if(wwb!=null){//创建一个可写入的工作表//Workbook的createSheet方法有两个参数，第一个是工作表的名称，第二个是工作表在工作薄中的位置WritableSheet ws = wwb.createSheet("工作表名称", 0);//下面开始添加单元格for(int i=0;i<10;i++){for(int j=0;j<5;j++){//这里需要注意的是，在Excel中，第一个参数表示列，第二个表示行Label labelC = new Label(j, i, "这是第"+(i+1)+"行，第"+(j+1)+"列");try {//将生成的单元格添加到工作表中ws.addCell(labelC);} catch (RowsExceededException e) {e.printStackTrace();} catch (WriteException e) {e.printStackTrace();}}}try {//从内存中写入文件中wwb.write();//关闭资源，释放内存wwb.close();} catch (IOException e) {e.printStackTrace();} catch (WriteException e) {e.printStackTrace();}}}/*** 生成一个Excel文件POI* @param inputFile 输入模板文件路径* @param outputFile 输入文件存放于服务器路径* @param dataList 待导出数据* @throws Exception* @roseuid:*/public static void exportExcelFile(String inputFile,String outputFile,List dataList) throws Exception{//用模板文件构造poiPOIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(inputFile));//创建模板工作表HSSFWorkbook templatewb = new HSSFWorkbook(fs);//直接取模板第一个sheet对象HSSFSheet templateSheet = templatewb.getSheetAt(1);//得到模板的第一个sheet的第一行对象为了得到模板样式HSSFRow templateRow = templateSheet.getRow(0);//HSSFSheet timplateSheet = templatewb.getSheetAt(1);//取得Excel文件的总列数int columns = templateSheet.getRow((short) 0).getPhysicalNumberOfCells();// Debug.println("columns is : " + columns); //========================= //创建样式数组HSSFCellStyle styleArray[] = new HSSFCellStyle[columns];//一次性创建所有列的样式放在数组里for (int s = 0; s < columns; s++) {//得到数组实例styleArray[s] = templatewb.createCellStyle();}&nbsp循环对每一个单元格进行赋值//定位行for (int rowId = 1; rowId < dataList.size(); rowId++) {//依次取第rowId行数据每一个数据是valueListList valueList = (List) dataList.get(rowId - 1);//定位列for (int columnId = 0; columnId < columns; columnId++) {//依次取出对应与colunmId列的值//每一个单元格的值String dataValue = (String) valueList.get(columnId);//取出colunmId列的的style//模板每一列的样式HSSFCellStyle style = styleArray[columnId];//取模板第colunmId列的单元格对象//模板单元格对象HSSFCell templateCell = templateRow.getCell((short) columnId);//创建一个新的rowId行行对象//新建的行对象HSSFRow hssfRow = templateSheet.createRow(rowId);//创建新的rowId行columnId列单元格对象//新建的单元格对象HSSFCell cell = hssfRow.createCell((short) columnId);//如果对应的模板单元格样式为非锁定if (templateCell.getCellStyle().getLocked() == false) {//设置此列style为非锁定style.setLocked(false);//设置到新的单元格上cell.setCellStyle(style);}//否则样式为锁定else {//设置此列style为锁定style.setLocked(true);//设置到新单元格上cell.setCellStyle(style);}//设置编码cell.setEncoding(HSSFCell.ENCODING_UTF_16);//Debug.println("dataValue : " + dataV alue);//设置值统一为Stringcell.setCellValue(dataV alue);}}//设置输入流FileOutputStream fOut = new FileOutputStream(outputFile);//将模板的内容写到输出文件上templatewb.write(fOut);fOut.flush();//操作结束，关闭文件fOut.close();}/*** 导出数据为XLS格式* @param fos 生成Excel文件Path* @param bo 要导入的数据*/public static void writeExcelBo(String fos, java.util.List ve) {jxl.write.WritableWorkbook wwb;try{wwb= Workbook.createWorkbook(new File(fos));jxl.write.WritableSheet ws= wwb.createSheet("上市新书", 10);ws.addCell(new bel(0, 1, "书名"));ws.addCell(new bel(1, 1, "作者"));ws.addCell(new bel(2, 1, "定价"));ws.addCell(new bel(3, 1, "出版社"));int bookSize=ve.size();BookVO book = new BookVO();for (int i= 0; i < bookSize; i++){book= (BookVO)ve.get(i);ws.addCell(new bel(0, i + 2, "" + book.getBookName()));ws.addCell(new bel(1, i + 2, book.getBookAuthor()));ws.addCell(new bel(2, i + 2, "" + book.getBookPrice()));ws.addCell(new bel(3, i + 2, book.getBookConcern()));}// jxl.write.WritableFont wfc=//newjxl.write.WritableFont(WritableFont.ARIAL,255,WritableFont.BOLD,false,UnderlineStyle.NO_U NDERLINE,jxl.format.Colour.BLACK);//jxl.write.WritableCellFormat wcfFC= new jxl.write.WritableCellFormat(wfc);ws.addCell(new bel(0, 0, "2007年07月即将上市新书！"));wwb.write();// 关闭Excel工作薄对象wwb.close();} catch (IOException e){} catch (RowsExceededException e){} catch (WriteException e){}}public static void main(String[] args) {writeExcel("c:\\Test测试Excel.xls");System.out.println("OK");ArrayList list = new ArrayList();for (int i = 0; i < 10; i++) {BookVO book = new BookVO();book.setBookName("WebWork in action+"+i);book.setBookAuthor("唐勇+"+i);book.setBookPrice("39元+"+i);book.setBookConcern("飞思科技+"+i);list.add(book);}writeExcelBo("c:\\上市新书.xls",list);System.err.println("Book OK!!!");}}=================摘要=====================java如何操作Excel(数据导入导出)(转)jxl.jar，可以到下载。

HutoolJava工具类库导出Excel并合并数据，全网最详细！

HutoolJava⼯具类库导出Excel并合并数据，全⽹最详细！ps：基于HuTool⼯具类ExcelWriter合并单元格并且使⽤ jdk1.8 lambda表达式⼀、原始数据模板⼆、合并后的数据按照班级名称、班级分数、⼩组名称、⼩组得分、⼈物名称、⼈物总分进⾏单元格合并合并后效果：三、导⼊依赖ps：pom依赖版本不合适可以换其他版本导出是项⽬中最常见的功能，例如考勤记录导出，账单明细导出，订单记录导出等等。

导出的⼯具类有许多种，⽬前常见的有poi,easypoi,poi...,今天我要说的是基于hutool-poi的导出，hutool-poi是将poi做了封装，简化了⼤量的代码编写。

使⽤⽅式：maven在项⽬的pom.xml中引⼊<dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>4.5.1</version></dependency>gradle在项⽬的build.gradle中引⼊compile 'cn.hutool:hutool-all:5.7.3'四、代码逻辑1.查找数据库返回数据voList；2.设置导出表头数据；3.⽤lambda表达式获取字段分组数据；4.遍历数据，设置合并规则；5.将数据保存在list中；6.ExcelWriter导出excel⽂件五、代码1.需实现将⼈物信息导出到excel⽂件中并且还要按照班级名称，⼩组名称，⼈物名称动态合并单元格，所以先创建⼈物对象：@Data@AllArgsConstructor //⽣成所有参数的构造器public class Person {//班级名称private String className;//班级分数private double classScore;//⼩组名称private String groupName;//⼩组分数private double groupScore;//⼈物姓名private String personName;//⼈物总分private double personScore;//学科名称private String subjectName;//学科分数private double subjectScore;}2.导出核⼼代码：@Slf4j@RestController@RequestMapping("/person")public class PersonController {/*** 将页⾯的数据导出并合并单元格* @param response*/@ApiOperation(value = "导出数据到excel")@ApiImplicitParams({@ApiImplicitParam(name = "response", value = "响应体对象", dataType = "HttpServletResponse")})@GetMapping("/export")public void export(HttpServletResponse response)throws Exception{//1.模拟⼀些⼈物对象数据（⼯作中从数据库查出来）List<Person> list = new ArrayList<>();list.add(new Person("⼀班",90,"⼀组",89,"孙悟空",89,"语⽂",89));list.add(new Person("⼀班",90,"⼀组",89,"孙悟空",89,"数学",98));list.add(new Person("⼀班",90,"⼀组",89,"唐僧",78,"语⽂",98));list.add(new Person("⼀班",90,"⼀组",89,"唐僧",78,"数学",78));list.add(new Person("⼀班",90,"⼆组",90,"沙悟净",90,"语⽂",90));list.add(new Person("⼀班",90,"⼆组",90,"沙悟净",90,"数学",90));list.add(new Person("⼆班",91,"⼀组",97,"鲁智深",98,"语⽂",89));list.add(new Person("⼆班",91,"⼀组",97,"鲁智深",98,"数学",98));list.add(new Person("⼆班",91,"⼆组",89,"宋江",89,"语⽂",98));list.add(new Person("⼆班",91,"⼆组",89,"宋江",89,"数学",78));list.add(new Person("⼆班",91,"⼆组",89,"林冲",88,"语⽂",90));list.add(new Person("⼆班",91,"⼆组",89,"林冲",88,"数学",90));//2.定义基础数据List<String> rowHead = CollUtil.newArrayList("班级名称","班级分数","⼩组名称","⼩组分数","⾓⾊姓名","⾓⾊总分","学科名称","学科分数");//3.通过ExcelUtil.getBigWriter()创建Writer对象，BigExcelWriter⽤于⼤数据量的导出，不会引起溢出；ExcelWriter writer = ExcelUtil.getBigWriter();//4.写⼊标题writer.writeHeadRow(rowHead);ServletOutputStream out = null;//5.实现核⼼逻辑try {//6.定义容器保存⼈物数据List<List<Object>> rows = new LinkedList<>();//7.按照班级进⾏分组LinkedHashMap<String, List<Person>> classList = list.stream().collect(Collectors.groupingBy(item -> item.getClassName(),LinkedHashMap::new, Collectors.toList()));//8.定义起始⾏（⽅便分组后合并时从哪⼀⾏开始）//因为标题已经占了⼀⾏，所以数据从第⼆⾏开始写（excel第⼀⾏索引为0）//因需要合并到⼈物分数单元格所以需定义如下起始坐标int indexClassName = 1; //班级名称起始⾏int indexClassScore = 1;int indexGroupName = 1;int indexGroupScore = 1;int indexPersonName = 1;int indexPersonScore = 1;//9.遍历按班级名分组后的list（⽤entrySet效率⽐keySet效率⾼）for (Map.Entry<String, List<Person>> classNameListEntry : classList.entrySet()) {//10.获取按照班级名分组后的集合List<Person> classValue = classNameListEntry.getValue();//11.计算此集合的长度int classSize = classValue.size();//12.如果只有⼀⾏数据不能调⽤merge⽅法合并数据，否则会报错if (classSize == 1){indexClassName += classSize;indexClassScore += classSize;indexGroupName += classSize;indexGroupScore += classSize;indexPersonName += classSize;indexPersonScore += classSize;}else{//13.根据班级名称进⾏合并单元格//合并⾏，第⼀个参数是合并⾏的开始⾏号（⾏号从0开始），第⼆个参数是合并⾏的结束⾏号，第三个参数是合并的列号开始(列号从0开始)， //第四个参数是合并的列号结束，第五个参数是合并后的内容，null不设置，第六个参数指是否⽀持设置样式，true指的是。

java自定义注解在excel导出时的使用

java自定义注解在excel导出时的使用在Java中，自定义注解是一种用于在程序中进行标记的机制。

通过定义自己的注解，可以为类、方法、字段等元素添加元数据，用于描述它们的特性和行为。

在Excel导出时，自定义注解可以用来定义导出的字段和格式，并且可以通过反射机制来读取注解信息，实现自动导出的功能。

下面是一个简单的自定义注解示例：```javaimport ng.annotation.*;String name( default ""; // 导出字段的名称int width( default 20; // 导出字段的宽度String format( default ""; // 导出字段的格式```定义了注解之后，可以在需要导出的类中使用该注解对字段进行标记。

例如：```javapublic class Userprivate String name;private int age;//其他字段和方法...```接下来，可以编写一个用于导出Excel的工具类。

该类可以使用反射来读取类的字段和注解信息，并根据注解信息生成相应的Excel文件。

以下是一个简单的Excel导出工具类示例：```javapublic class ExcelExportUtilpublic static <T> void exportToExcel(List<T> data, Class<T> clazz, String filePath)//创建工作簿和工作表Workbook workbook = new HSSFWorkbook(;Sheet sheet = workbook.createSheet("Sheet1");//获取类的字段和注解信息Field[] fields = clazz.getDeclaredFields(;for (int i = 0; i < fields.length; i++)Field field = fields[i];ExcelField excelField =field.getAnnotation(ExcelField.class);if (excelField != null)//获取注解信息String fieldName = (;int width = excelField.width(;//设置列宽sheet.setColumnWidth(i, width * 256);//创建表头单元格Row headerRow = sheet.getRow(0);if (headerRow == null)headerRow = sheet.createRow(0);}Cell headerCell = headerRow.createCell(i); headerCell.setCellValue(fieldName);}}//创建数据行for (int i = 0; i < data.size(; i++)T item = data.get(i);Row dataRow = sheet.getRow(i + 1);if (dataRow == null)dataRow = sheet.createRow(i + 1);}for (int j = 0; j < fields.length; j++)Field field = fields[j];if (field.isAccessible()try//获取字段值Object value = field.get(item);//创建数据单元格并填充数据Cell dataCell = dataRow.createCell(j); if (value instanceof String) dataCell.setCellValue((String) value); } else if (value instanceof Integer) dataCell.setCellValue((int) value);} else if (value instanceof Double) dataCell.setCellValue((double) value); }} catch (IllegalAccessException e)e.printStackTrace(;}}}}// 保存Excel文件try (FileOutputStream outputStream = newFileOutputStream(filePath))workbook.write(outputStream);} catch (IOException e)e.printStackTrace(;}}```在上面的示例中，exportToExcel方法接收一个泛型列表和类的字节码对象，通过反射来读取类的字段和注解信息，并根据注解信息生成Excel文件。

java实现导出Excel(跨行跨列)

java实现导出Excel（跨行跨列）在Java中，可以使用Apache POI库来实现导出Excel文件，并且可以实现跨行和跨列的功能。

Apache POI是一个开源的Java库，可以处理Microsoft Office格式的文档，包括Excel。

以下是使用Apache POI库实现导出Excel文件的步骤：1. 首先，需要引入Apache POI依赖。

可以在Maven或Gradle中添加以下依赖项：```xml<dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>4.1.2</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>4.1.2</version></dependency>2. 创建一个Workbook对象，该对象代表一个Excel文件：```javaWorkbook workbook = new XSSFWorkbook(;```3. 创建一个Sheet对象，该对象代表Excel文件中的一个工作表：```javaSheet sheet = workbook.createSheet("Sheet1");```4. 创建行和单元格，根据需要设置跨行和跨列的属性。

可以使用CellRangeAddress类来实现跨行和跨列的功能：```javaRow row = sheet.createRow(0);Cell cell = row.createCell(0);cell.setCellValue("跨行跨列");//合并单元格，从第1行到第3行，从第1列到第5列CellRangeAddress cellRangeAddress = new CellRangeAddress(0, 2, 0, 4);sheet.addMergedRegion(cellRangeAddress);5. 将数据写入Excel文件中的单元格：```javaRow row = sheet.createRow(0);Cell cell = row.createCell(0);cell.setCellValue("Hello");```6. 将Workbook对象写入到文件中：```javaFileOutputStream fileOutputStream = new FileOutputStream("output.xlsx");workbook.write(fileOutputStream);fileOutputStream.close(;```完整的示例代码如下所示：```javaimport ermodel.*;import org.apache.poi.ss.util.CellRangeAddress;import ermodel.XSSFWorkbook;import java.io.FileOutputStream;import java.io.IOException;public class ExcelExporterpublic static void main(String[] args) throws IOExceptionWorkbook workbook = new XSSFWorkbook(;Sheet sheet = workbook.createSheet("Sheet1");Row row = sheet.createRow(0);Cell cell = row.createCell(0);cell.setCellValue("跨行跨列");//合并单元格，从第1行到第3行，从第1列到第5列CellRangeAddress cellRangeAddress = new CellRangeAddress(0, 2, 0, 4);sheet.addMergedRegion(cellRangeAddress);FileOutputStream fileOutputStream = newFileOutputStream("output.xlsx");workbook.write(fileOutputStream);fileOutputStream.close(;System.out.println("Excel文件导出成功！");}```执行该代码后，会在项目的根目录下生成一个名为`output.xlsx`的Excel文件，其中包含一个跨行和跨列的单元格。

java导出excel浏览器直接下载或者或以文件形式导出

java导出excel浏览器直接下载或者或以⽂件形式导出看代码吧~/*** excel表格直接下载*/public static void exportExcelByDownload(HSSFWorkbook wb,HttpServletResponse httpServletResponse,String fileName) throws Exception {//响应类型为application/octet- stream情况下使⽤了这个头信息的话，那就意味着不想直接显⽰内容httpServletResponse.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);//attachment为以附件⽅式下载httpServletResponse.setHeader("Content-Disposition","attachment;filename=" + URLEncoder.encode(fileName + ".xls","utf-8"));/*** 代码⾥⾯使⽤Content-Disposition来确保浏览器弹出下载对话框的时候。

* response.addHeader("Content-Disposition","attachment");⼀定要确保没有做过关于禁⽌浏览器缓存的操作*/httpServletResponse.setHeader("Cache-Control", "No-cache");httpServletResponse.flushBuffer();wb.write(httpServletResponse.getOutputStream());wb.close();}/*** excel以⽂件的形式导出* @throws Exception*/public static void exportExcelByFile(HSSFWorkbook wb,String fileName,String path) throws Exception{ByteArrayOutputStream stream = new ByteArrayOutputStream();wb.write(stream);FileOutputStream outputStream = new FileOutputStream(path + fileName);outputStream.write(stream.toByteArray());stream.close();outputStream.close();}java查询数据导出excel并返回给浏览器下载效果图：1.点击导出表按钮2.接着就会出现下图3.点击上图中的确定按钮再接着就会出现下图4.点击上图中的保存按钮接着就会出现下图，浏览器下载完成后的提⽰5.打开下载好的⽂件如下图好了，废话不多少，上代码jsp前端代码<div style="height:30px;"><a>时间：</a><input id="startDateConsume" type="text" class="easyui-datebox"> <a>-</a><input id="endDateConsume" type="text" class="easyui-datebox"><a>消费类型：</a><select id="consumesType" name=""><option value="0" selected="selected">所有</option><option value="1">报名费</option><option value="2">酒⽔零⾷类</option></select><a>⽀付状态：</a><select id="conPaymentStatus" name=""><option value="0" selected="selected">所有</option><option value="1">未⽀付</option><option value="2">已⽀付</option></select><a id="btnConsumesSearch" class="easyui-linkbutton"data-options="iconCls:'icon-search'" style="margin-left:10px">查询</a><a>（查询出来的数据可统计）</a><a id="consumesOutExcel" class="easyui-linkbutton" style="" data-options="iconCls:'icon-redo'">导出表</a></div>js前端代码$(function() {//导出excel表$('#consumesOutExcel').on('click',function(){exportExcel();});});function exportExcel() {$.messager.confirm('确认', '确认把该搜索结果导出Excel表格？', function(r) {if (r) {var startTime = $('#startDateConsume').val();var endTime = $('#endDateConsume').val();var consumesType = $('#consumesType').val();var conPaymentStatus = $('#conPaymentStatus').val();$.messager.progress({title : '处理中',msg : '请稍后',});$.messager.progress('close');location.href="web/vip/exportExcel.xlsx?startTime=" rel="external nofollow" +startTime+"&endTime="+endTime+"&consumesType="+consumesType+"&conPaymentStatus="+conPaymentStatus; }});}java后端代码@Controller@RequestMapping("/vip")public class VipController {//⽂件下载：导出excel表@RequestMapping(value = "/exportExcel.xlsx",method = RequestMethod.GET)@ResponseBodypublic void exportExcel(HttpServletRequest request,HttpServletResponse response) throws UnsupportedEncodingException{//⼀、从后台拿数据if (null == request || null == response){return;}List<VipConsumes> list = null;String startTime = request.getParameter("startTime");String endTime = request.getParameter("endTime");int consumesType = Integer.parseInt(request.getParameter("consumesType"));int conPaymentStatus =Integer.parseInt(request.getParameter("conPaymentStatus"));VipConsumesExample example = new VipConsumesExample();if(consumesType!=0 && conPaymentStatus!=0){example.createCriteria().andTimeBetween(startTime, endTime).andConsumeTypeEqualTo(consumesType).andStatusEqualTo(conPaymentStatus);}else if(consumesType ==0 && conPaymentStatus!=0) {example.createCriteria().andTimeBetween(startTime, endTime).andStatusEqualTo(conPaymentStatus);}else if(consumesType!=0 && conPaymentStatus==0){example.createCriteria().andTimeBetween(startTime, endTime).andConsumeTypeEqualTo(consumesType);}else {example.createCriteria().andTimeBetween(startTime, endTime);}list = this.vipConsumesDao.selectByExample(example);//⼆、数据转成excelrequest.setCharacterEncoding("UTF-8");response.setCharacterEncoding("UTF-8");response.setContentType("application/x-download");String fileName = "消费记录.xlsx";fileName = URLEncoder.encode(fileName, "UTF-8");response.addHeader("Content-Disposition", "attachment;filename=" + fileName); // 第⼀步：定义⼀个新的⼯作簿XSSFWorkbook wb = new XSSFWorkbook();// 第⼆步：创建⼀个Sheet页XSSFSheet sheet = wb.createSheet("startTimeendTime");sheet.setDefaultRowHeight((short) (2 * 256));//设置⾏⾼sheet.setColumnWidth(0, 4000);//设置列宽sheet.setColumnWidth(1,5500);sheet.setColumnWidth(2,5500);sheet.setColumnWidth(3,5500);sheet.setColumnWidth(11,3000);sheet.setColumnWidth(12,3000);sheet.setColumnWidth(13,3000);XSSFFont font = wb.createFont();font.setFontName("宋体");font.setFontHeightInPoints((short) 16);XSSFRow row = sheet.createRow(0);XSSFCell cell = row.createCell(0);cell.setCellValue("流⽔号 ");cell = row.createCell(1);cell.setCellValue("微信名 ");cell = row.createCell(2);cell.setCellValue("微信订单号");cell = row.createCell(3);cell.setCellValue("消费时间");cell = row.createCell(4);cell.setCellValue("消费类型");cell = row.createCell(5);cell.setCellValue("剩余积分 ");cell = row.createCell(6);cell.setCellValue("新增积分 ");cell = row.createCell(7);cell.setCellValue("扣除积分 ");cell = row.createCell(8);cell.setCellValue("消费⾦额");cell = row.createCell(9);cell.setCellValue("⽀付⽅式");cell = row.createCell(10);cell.setCellValue("⽀付状态 ");cell = row.createCell(11);cell.setCellValue("钱包原始⾦额");cell = row.createCell(12);cell.setCellValue("钱包扣除⾦额");cell = row.createCell(13);cell.setCellValue("钱包剩余⾦额");XSSFRow rows;XSSFCell cells;for (int i = 0; i < list.size(); i++) {// 第三步：在这个sheet页⾥创建⼀⾏rows = sheet.createRow(i+1);// 第四步：在该⾏创建⼀个单元格cells = rows.createCell(0);// 第五步：在该单元格⾥设置值cells.setCellValue(list.get(i).getConsumeId());cells = rows.createCell(1);cells.setCellValue(list.get(i).getName());cells = rows.createCell(2);cells.setCellValue(list.get(i).getOrderNumber());cells = rows.createCell(3);cells.setCellValue(list.get(i).getTime());cells = rows.createCell(4);if (list.get(i).getConsumeType() == 2) {cells.setCellValue("酒⽔零⾷费");} else {cells.setCellValue("报名费");}cells = rows.createCell(5);cells.setCellValue(list.get(i).getIntegral());cells = rows.createCell(6);cells.setCellValue(list.get(i).getIntegralIn());cells = rows.createCell(7);cells.setCellValue(list.get(i).getIntegralOut());cells = rows.createCell(8);cells.setCellValue(list.get(i).getMoney());cells = rows.createCell(9);if (list.get(i).getPayment() == 2) {cells.setCellValue("积分抵现");} else if (list.get(i).getPayment() == 3) {cells.setCellValue("微信⽀付");} else if (list.get(i).getPayment() == 4) {cells.setCellValue("现⾦");} else if (list.get(i).getPayment() == 1) {cells.setCellValue("钱包");}cells = rows.createCell(10);if (list.get(i).getStatus() == 2) {cells.setCellValue("已⽀付");} else if (list.get(i).getStatus() == 1) {cells.setCellValue("未⽀付");}cells = rows.createCell(11);cells.setCellValue(list.get(i).getWalletOriginal());cells = rows.createCell(12);cells.setCellValue(list.get(i).getWalletOut());cells = rows.createCell(13);cells.setCellValue(list.get(i).getWalletSurplus());}try {OutputStream out = response.getOutputStream();wb.write(out);out.close();wb.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}以上为个⼈经验，希望能给⼤家⼀个参考，也希望⼤家多多⽀持。

Java导入导出Excel工具类ExcelUtil

Java导⼊导出Excel⼯具类ExcelUtil导出就是将List转化为Excel（listToExcel）导⼊就是将Excel转化为List（excelToList）导⼊导出中会出现各种各样的问题，⽐如：数据源为空、有重复⾏等，我⾃定义了⼀个ExcelException异常类，⽤来处理这些问题。

异常类导出⼯具类：public Map<String,Object> exportMessageExcelFile(String title, String[] headers,List dossierList, OutputStream out, String pattern){boolean flag = true;Map<String,Object> map = new HashMap<String,Object>();StringBuffer messageFile = new StringBuffer();// 声明⼀个⼯作薄HSSFWorkbook workbook = new HSSFWorkbook();// ⽣成⼀个表格HSSFSheet sheet = workbook.createSheet(title);// 设置表格默认列宽度为15个字节sheet.setDefaultColumnWidth((short) 15);// ⽣成⼀个样式HSSFCellStyle style = workbook.createCellStyle();style.setBorderBottom(HSSFCellStyle.BORDER_THIN);style.setBorderLeft(HSSFCellStyle.BORDER_THIN);style.setBorderRight(HSSFCellStyle.BORDER_THIN);style.setBorderTop(HSSFCellStyle.BORDER_THIN);style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//产⽣表格标题⾏HSSFRow row = sheet.createRow(0);for (short i = 0; i < headers.length; i++) {HSSFCell cell = row.createCell(i);cell.setCellStyle(style);HSSFRichTextString text = new HSSFRichTextString(headers[i]);cell.setCellValue(text);}for(int i = 0; i< dossierList.size();i++){Object[] obj = (Object[]) dossierList.get(i);row = sheet.createRow(i+1);for (int j = 0; j < obj.length; j++) {HSSFCell cell = row.createCell(j);cell.setCellStyle(style);if(j==0){cell.setCellValue(i+1);//序号}if(j==1){//Logger.debug("obj[5]"+obj[5]);cell.setCellValue(obj[5]==null?"":obj[5].toString());//办理⼈}if(j==2){//Logger.debug("obj[3]"+obj[3]);cell.setCellValue(obj[3]==null?"":obj[3].toString());//办理时间}if(j==3){// Logger.debug("obj[2]"+obj[2]);cell.setCellValue(obj[2]==null?obj[6]==null?"":obj[6].toString():obj[2].toString());//办理意见if(null!=obj[6]&&!"".equals(obj[6])){messageFile.append(obj[6].toString()+",");}break;}}}map.put("messageFile", messageFile.toString().endsWith(",")?messageFile.toString().substring(0, messageFile.toString().length()-1):messageFile.toString());try {workbook.write(out);} catch (IOException e) {e.printStackTrace();flag = false;}finally {//清理资源try {if(out != null){out.close();}} catch (IOException e) {e.printStackTrace();}}map.put("flag", flag);return map;}测试类：public static void main(String[] args) {ExportExcel<Object> ex = new ExportExcel<Object>();String[] headers = { "学号"};List<Object[]> dataset = new ArrayList<Object[]>();dataset.add(new Object[]{"1"});dataset.add(new Object[]{"2"});dataset.add(new Object[]{"3"});dataset.add(new Object[]{"4"});dataset.add(new Object[]{"5"});try {OutputStream out = new FileOutputStream("C://Users//Lenovo//Desktop/aa.xls");ex.exportMessageExcelFile("测试POI导出EXCEL⽂档", headers, dataset, out, "yyyy-MM-dd"); } catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}}。

java批量导出excel格式数据(含每条数据的附件)

,批量导出数据到excel中（包含每条数据对应的附件）本程序功能功能说明采用压缩的方法把用户要导出的excel 文件和excle数据中每条数据对应的文件，打包成一个大文件，输出到缓存区，用户通过浏览器来下载这个文件，缺陷是文件过大时,比如几个G大小的附件，ie下载很慢。

建议用360等支持断点续传的功能的浏览器来下载。

Excel查看附件采用的是链接方式详细如下面截图，点击文件链接，可以链接到相对文件位置的文件夹（因为附件可能是多个，采用的都是文件夹的相对链接的方式实现的），压缩包内存放的文件结构：Excel文件，reportfile（存放附件的文件夹，文件夹结构详细见代码）每行excel 都对应相对的文件夹（reportfile内的某一个子文件夹和excel的行号相对应），如下截图，红色圈圈链接的就是对应的相应文件夹下的appfile文件夹下的文件：//引入的类import org.apache.tools.zip.ZipEntry;//把文件写入到压缩对象outimport org.apache.tools.zip.ZipOutputStream;import java.io.*;import java.io.OutputStream;import java.util.ArrayList;import java.util.LinkedHashMap;import java.util.List;import ermodel.HSSFCell;import ermodel.HSSFCellStyle;import ermodel.HSSFFont;import ermodel.HSSFRichTextString;import ermodel.HSSFRow;import ermodel.HSSFSheet;import ermodel.HSSFWorkbook;import org.apache.poi.hssf.util.HSSFCellUtil;import org.apache.poi.hssf.util.HSSFColor;import org.apache.poi.hssf.util.Region;import ermodel.Font;import ermodel.HSSFHyperlink;//写入压缩的文件对象privatevoid zipfileinfo(ZipOutputStream out, File f, String base) throws Exception{//记录文件“f”对象在压缩包中的位置及压缩后的文件名称：out.putNextEntry(new ZipEntry(base));、// 写入压缩文件对象FileInputStream in = new FileInputStream(f);int b = 0;byte[] buf = newbyte[1024];while ((b = in.read(buf)) != -1){out.write(buf, 0, b);}in.close();}// 开始压缩文件privatevoid ziptmpfilelist(ZipOutputStream out, String factfielnamelist,String tmpfielnamelist) throws Exception {String[] tmpList = tmpfielnamelist.split(";");String[] fackList = factfielnamelist.split(";");for (int i = 0; i<tmpList.length; i++) {File tmpfile = new File(fackList[i]);zipfileinfo(out, tmpfile, tmpList[i].replaceAll("\\\\", "/"));}}@Overrideprotectedvoid doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {// 存放文件的实际位置位置（绝对路径）String factfielnamelist="D:\\iscm\\attachdata\\2015\\0422\\FuaiFugQArVTjpG;D:\\iscm\\a ttachdata\\2015\\0422\\HIxtANutsZrwDTZ;D:\\iscm\\attachdata\\2 015\\0422\\HIxtANutsZrwDTZ";// 存放文件的位置（绝对路径）压缩时对应文件在压缩文件中的位置及名称String tmpfielnamelist = "reportfile\\tmp1\\appfile\\项目审批2.ipa;reportfile\\tmp1\\appfile\\项目审批1.doc;reportfile\\tmp1\\selffile\\app.docx";try {// 存放临时文件的目录（绝对路径）ZipOutputStream out = new ZipOutputStream(new FileOutputStream("d:\\test.zip"));response.reset();response.setContentType("application/octet-stream");response.setHeader("Content-Disposition","attachment;filename=test.zip");// 输出到缓存区方式ZipOutputStream out = newZipOutputStream(response.getOutputStream());// out.setEncoding("gbk");out.setEncoding("gb2312");//System.out.println(zipFileName);ziptmpfilelist(out, factfielnamelist, tmpfielnamelist);//输出到excel中 List<LinkedHashMap<String, Object>> result 是excel 写入的数据集合，这个需要自己重新定义.ExportExcelUtils.exportExcelAppReoort("App报备信息", headers, columns,result, "", out);out.close();} catch (Exception e) {e.printStackTrace();}}创建excel对象并写入压缩包方法/*** 控制点导出Excel的方法* @param title excel中的sheet名称* @param headers 表头* @param columns 表头对应的数据库中的列名* @param result 结果集* @param out 输出流* @param pattern 时间格式* @throws Exception*/publicstaticvoid exportExcelAppReoort(String title, String[] headers, String[] columns, List<LinkedHashMap<String, Object>> result, String filepath, ZipOutputStream out) throws Exception{//java.io.FileOutputStream out=newjava.io.FileOutputStream(filepath);// 声明一个工作薄HSSFWorkbook workbook = new HSSFWorkbook();// 生成一个表格HSSFSheet sheet = workbook.createSheet(title);// 设置表格默认列宽度为20个字节sheet.setDefaultColumnWidth(20);// 生成一个样式HSSFCellStyle style = workbook.createCellStyle();// 设置这些样式style.setFillForegroundColor(HSSFColor.GOLD.index);style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);style.setBorderBottom(HSSFCellStyle.BORDER_THIN);style.setBorderLeft(HSSFCellStyle.BORDER_THIN);style.setBorderRight(HSSFCellStyle.BORDER_THIN);style.setBorderTop(HSSFCellStyle.BORDER_THIN);style.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 生成一个字体HSSFFont font = workbook.createFont();font.setColor(HSSFColor.VIOLET.index);//font.setFontHeightInPoints((short) 12);font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 把字体应用到当前的样式style.setFont(font);// 指定当单元格内容显示不下时自动换行style.setWrapText(true);// 产生表格标题行HSSFRow row1 = sheet.createRow(0);// sheet.addMergedRegion(new CellRangeAddress(1,2,3,4));//合并单元格sheet.addMergedRegion(new Region(0,(short)0,0,(short)19));row1.setHeight((short)600); //设置行高度HSSFCell cell1 = row1.createCell(0);cell1.setCellStyle(style);cell1.setCellValue(title); //"App报备信息"HSSFRow row = sheet.createRow(1);for (int i = 0; i<headers.length; i++) {HSSFCell cell = row.createCell(i);cell.setCellStyle(style);HSSFRichTextString text = new HSSFRichTextString(headers[i]); cell.setCellValue(text);}// 遍历集合数据，产生数据行if(result != null){int index = 2;for(LinkedHashMap<String, Object> m:result){row = sheet.createRow(index);int cellIndex = 0;for(String s:columns){HSSFCell cell = row.createCell(cellIndex);//cell.setCellStyle(style2);HSSFRichTextStringrichString = new HSSFRichTextString(m.get(s) == null ? "" : m.get(s).toString());if(s.equals("appAttr") || s.equals("threeSynAttr") ){//当前记录记录附件链接的文件夹位置（文件可能多个，如果一个的话，可以自己处理直接链接指向文件）String tmp=richString.toString();if (!(richString.toString().equals(""))){cell.setCellValue("文件链接");HSSFHyperlink link =new HSSFHyperlink(HSSFHyperlink.LINK_URL);link.setAddress(richString.toString());cell.setHyperlink(link);}}else{if(cellIndex==0)cell.setCellValue(Integer.valueOf(m.get(s).toString()));elsecell.setCellValue(richString);}cellIndex++;}index++;}}//写入压缩包out.putNextEntry(new ZipEntry("appReport.xls"));workbook.write(out); //写入文件}。

记一次Java导出大批量Excel优化

记⼀次Java导出⼤批量Excel优化常⽤的excel导出⽅案，详情见，其中jxl、esayEscel 底层都是基于 poi，它们仅仅是对 poi 进⾏了封装，使导出 excel 的代码更加简洁（封装poi，导出 excel 的⼯具类有很多，jxl 和 esayExcel 使⽤的⽐较多）。

所以，如果遇到 excel 导出效率低下，直接基于 poi 导出 Excel，效率肯定是最⾼的，只是代码⽐较繁琐与杂乱。

我主要是基于 esayExcel （⽬前使⽤⽐较多），对其 api 进⾏衍⽣与应⽤，解决导出⼤量 Excel 导致的 OOM，或者数据超界异常：ng.IllegalArgumentException: Invalid row number (1048576) outside allowable range (0..1048575)应⽤是基于100W条数据进⾏的测试，数据的获取代码如下1package bean;23import com.alibaba.excel.annotation.ExcelProperty;4import com.alibaba.excel.annotation.format.DateTimeFormat;5import com.alibaba.excel.annotation.format.NumberFormat;6import lombok.Data;7import lombok.experimental.Accessors;89import java.util.Date;1011/**12 * @author dz13 * @date 2021-11-06 上午 9:1414*/15 @Accessors(chain = true)16 @Data17public class ExcelBean {1819 @ExcelProperty("主键id")20private String id;2122 @ExcelProperty("姓名")23private String name;2425 @ExcelProperty("地址")26private String address;2728 @ExcelProperty("年龄")29private Integer age;3031 @ExcelProperty("数量")32private Integer number;3334 @NumberFormat("#.##")35 @ExcelProperty("⾝⾼")36private Double high;3738 @ExcelProperty("距离")39private Double distance;4041 @DateTimeFormat("yyyy-MM-dd HH:mm:ss")42 @ExcelProperty("开始时间")43private Date startTime;4445 @ExcelProperty("结束时间")46private Date endTime;47 }1/**2 * 获取excel 导出的数据3 *4 * @return list 集合5*/6private List<ExcelBean> getDate() {7 ("开始⽣成数据");8 Date date = new Date();9long startTime = System.currentTimeMillis();10 List<ExcelBean> list = Lists.newArrayList();11for (int i = 0; i < 1000000; i++) {12 ExcelBean bean = new ExcelBean();13 bean.setId(UUID.randomUUID().toString()).14 setName("隔壁⽼樊" + i).15 setAddress("北京市朝阳区酒仙桥" + i + "路").16 setAge(i).17 setNumber(i + 10000).18 setHigh(1.234 * i).19 setDistance(1.234 * i).20 setStartTime(date).21 setEndTime(date);22 list.add(bean);23 }24 ("数据⽣成结束，数据量={}，耗时={}ms", list.size(), System.currentTimeMillis() - startTime);25return list;26 }pom 依赖1<dependency>2<groupId>org.projectlombok</groupId>3<artifactId>lombok</artifactId>4</dependency>5<dependency>6<groupId>com.alibaba</groupId>7<artifactId>easyexcel</artifactId>8<version>2.2.10</version>9</dependency>依赖 esayexcel 时，如果项⽬已经依赖了 poi，有可能会产⽣jar 包依赖冲突（easyexcel底层也是基于 poi），解决⽅案如下：⽅案⼀：查看 easyexcel 中依赖的 poi 的版本，然后将项⽬其余地⽅的版本修改成该版本，使项⽬依赖的 poi 版本和 easyexcel 依赖的版本⼀致⽅案⼆：在 esayexcel 中将 poi 的依赖排除掉，如下<dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>2.2.10</version><exclusions><exclusion><groupId>org.apache.poi</groupId><artifactId>poi</artifactId></exclusion><exclusion><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId></exclusion><exclusion><groupId>org.apache.poi</groupId><artifactId>poi-ooxml-schemas</artifactId></exclusion></exclusions></dependency>常量的定义1public static final String FILE_NAME = "D:\\test_" + System.currentTimeMillis() + ".xlsx";2// 每个 sheet 写⼊的数据3public static final int NUM_PER_SHEET = 300000;4// 每次向 sheet 中写⼊的数据（分页写⼊）5public static final int NUM_BY_TIMES = 50000;1.EasyExcel 导出 excel 应⽤使⽤ esayExcel ⾃带的 api 导出 excel 的应⽤，代码如下1/**2 * ⽅法⼀：将数据写⼊到excel3 * 直接调⽤api，适合⼩数据量4 * 100W条数据33s5*/6 @Test7public void writeExcelByApi() {8 String fileName = FILE_NAME;9 ("导出excel名称={}", fileName);10long startTime = System.currentTimeMillis();11// 直接调⽤api12 List<ExcelBean> date = getDate();13 EasyExcel.write(fileName, ExcelBean.class).sheet().doWrite(date);14 ("导出excel结束,数据量={}，耗时={}ms", date.size(), System.currentTimeMillis() - startTime);15 }当 list 对象数据量太多，就会产⽣异常：原因是单个 excel ⼀个 sheet 的最⼤数据量为 10485751 ng.IllegalArgumentException: Invalid row number (1048576) outside allowable range (0..1048575)23 at org.apache.poi.xssf.streaming.SXSSFSheet.createRow(SXSSFSheet.java:123)4 at org.apache.poi.xssf.streaming.SXSSFSheet.createRow(SXSSFSheet.java:65)5 at com.alibaba.excel.util.WorkBookUtil.createRow(WorkBookUtil.java:70)6 at com.alibaba.excel.write.executor.ExcelWriteAddExecutor.addOneRowOfDataToExcel(ExcelWriteAddExecutor.java:67)7 at com.alibaba.excel.write.executor.ExcelWriteAddExecutor.add(ExcelWriteAddExecutor.java:56)8 at com.alibaba.excel.write.ExcelBuilderImpl.addContent(ExcelBuilderImpl.java:58)9 at com.alibaba.excel.ExcelWriter.write(ExcelWriter.java:161)10 at com.alibaba.excel.ExcelWriter.write(ExcelWriter.java:146)11 at com.alibaba.excel.write.builder.ExcelWriterSheetBuilder.doWrite(ExcelWriterSheetBuilder.java:61)12 at mytest.TestExcel.writeExcelByApi(TestExcel.java:40)13 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)14 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)15 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)16 at ng.reflect.Method.invoke(Method.java:498)17 at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)18 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)19 at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)20 at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)21 at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)22 at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)23 at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)24 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)25 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)26 at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)27 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)28 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)29 at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)30 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)31 at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)32 at org.junit.runners.ParentRunner.run(ParentRunner.java:413)33 at org.junit.runner.JUnitCore.run(JUnitCore.java:137)34 at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)35 at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)36 at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)37 at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)2.EasyExcel 导出 excel 应⽤优化⼀：execl 数据量超过1048575将数据写⼊到不同的 sheet，保证每个 sheet 的数据量⼩于 1048575 ⾏，解决此问题，代码如下1/**2 * ⽅法⼆：导出多个sheet3 * easyExcel 底层是 POI 实现的，POI 单个sheet 最多只能导出 1048576 ⾏，超过该⾏数，会产⽣如下异常4 * ng.IllegalArgumentException: Invalid row number (1048576) outside allowable range (0..1048575)5 * <p>6 * 11:57:55.541 [main] INFO mytest.TestExcel - 写⼊sheet=sheet0，数据量300000-0=300000，耗时=6055ms7 * 11:57:59.701 [main] INFO mytest.TestExcel - 写⼊sheet=sheet1，数据量600000-300000=300000，耗时=4159ms8 * 11:58:03.827 [main] INFO mytest.TestExcel - 写⼊sheet=sheet2，数据量900000-600000=300000，耗时=4126ms9 * 11:58:05.193 [main] INFO mytest.TestExcel - 写⼊sheet=sheet3，数据量1000000-900000=100000，耗时=1366ms10 * 11:58:17.418 [main] INFO mytest.TestExcel - 导出excel结束,总数据量=1000000，耗时=31297ms11*/12 @Test13public void writeExcelByMulSheet() {14 String fileName = FILE_NAME;15 ("导出excel名称={}", fileName);16long startTime = System.currentTimeMillis();17// 获取数据18 List<ExcelBean> date = getDate();19// 获取 sheet 的个数20int sheetNum = date.size() % NUM_PER_SHEET == 0 ? date.size() / NUM_PER_SHEET : date.size() / NUM_PER_SHEET + 1;21// 指定写⼊的⽂件22 ExcelWriter excelWriter = EasyExcel.write(fileName, ExcelBean.class).build();23for (int i = 0; i < sheetNum; i++) {24long l = System.currentTimeMillis();25// 设置 sheet 的名字（sheet不能相同）26 String sheetName = "sheet" + i;27 WriteSheet writeSheet = EasyExcel.writerSheet(i, sheetName).build();28int startNum = i * NUM_PER_SHEET;29int endNum = i == sheetNum - 1 ? date.size() : (i + 1) * NUM_PER_SHEET;30 excelWriter.write(date.subList(startNum, endNum), writeSheet);31 ("写⼊sheet={}，数据量{}-{}={}，耗时={}ms", sheetName, endNum, startNum, endNum - startNum, System.currentTimeMillis() - l);32 }33// 最好放在 finally中34 excelWriter.finish();35 ("导出excel结束,总数据量={}，耗时={}ms", date.size(), System.currentTimeMillis() - startTime);36 }3.EasyExcel 导出 excel 应⽤优化⼆：数据源 list 太⼤，直接读取全部的 list 数据导致 OOM将 list 数据进⾏分页读取，并进⾏分页写⼊到 excel。

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sheetAct=createExcelHead(sheetAct,writer,excelHead,title+num);}list=agentService.queryExportData(map);if(j<5){findExcelData(j*limit,list,sheetAct);}else{int num=j/5;findExcelData((j-num*5)*limit,list,sheetAct);}}writer.write();}catch(Exception e){LOGGER.error("Exception:", e.fillInStackTrace());}finally {if (null != writer) {writer.close();}}return out.toByteArray();}findExcelData 方法：private void findExcelData(int start,List<StudioSeriesPrice> list,ExcelWriter.Sheet sheetAct){StudioSeriesPrice detail=null;/*拼装excel内容*/for(int i=0;i<list.size();i++){detail=list.get(i);sheetAct.getOrCreateCell((start+i + 1), 0).setCellStyle(sheetAct.addStyle());sheetAct.getOrCreateCell((start+i + 1), 0).setCellValue(detail.getCompany());sheetAct.getOrCreateCell((start+i + 1), 1).setCellStyle(sheetAct.addStyle());sheetAct.getOrCreateCell((start+i + 1), 1).setCellValue(detail.getCreatetime());sheetAct.getOrCreateCell((start+i + 1), 2).setCellStyle(sheetAct.addStyle());sheetAct.getOrCreateCell((start+i + 1), 2).setCellValue(detail.getPrice());sheetAct.getOrCreateCell((start+i + 1), 3).setCellStyle(sheetAct.addStyle());sheetAct.getOrCreateCell((start+i + 1),3).setCellValue(detail.getNum());sheetAct.getOrCreateCell((start+i + 1), 4).setCellStyle(sheetAct.addStyle());sheetAct.getOrCreateCell((start+i + 1), 4).setCellValue(detail.getTypename());sheetAct.getOrCreateCell((start+i + 1), 5).setCellStyle(sheetAct.addStyle());sheetAct.getOrCreateCell((start+i + 1), 5).setCellValue(detail.getAgentName());sheetAct.getOrCreateCell((start+i + 1), 6).setCellStyle(sheetAct.addStyle());sheetAct.getOrCreateCell((start+i + 1), 6).setCellValue(detail.getPricename());}}/**** @param sheetAct* @param writer* @param excelHead* @param title* @return*/private ExcelWriter.Sheet createExcelHead( ExcelWriter.Sheet sheetAct,ExcelWriter writer,String [] excelHead,String title){ sheetAct = writer.getOrCreateSheet(title);/*拼装excel头部*/for(int i=0;i<excelHead.length;i++){sheetAct.getOrCreateCell(0,i).setCellStyle(sheetAct.addStyle());sheetAct.setColumnWidth(i, 6000);sheetAct.getOrCreateCell(0,i).setCellValue(excelHead[i]);}return sheetAct;}帮助类：package com.kerui.utils;import java.io.IOException;import java.io.OutputStream;import java.util.Date;import java.util.HashMap;import java.util.Map;import mons.io.IOUtils;import ermodel.HSSFCellStyle;import ermodel.CellStyle;import ermodel.DataFormat;import ermodel.Row;import ermodel.Workbook;import org.apache.poi.ss.util.CellRangeAddress;import ermodel.XSSFWorkbook;public final class ExcelWriter {public static final class Cell {private Workbook wb;private ermodel.Cell target;private Cell(Workbook wb, ermodel.Cell cell) {this.wb = wb;this.target = cell;}public void setCellValue(String value) {this.target.setCellValue(value);}public void setCellValue(Date value) {if (null == value) {this.setCellValue("未设置");return;}CellStyle style = this.wb.createCellStyle();DataFormat format = wb.createDataFormat();style.setDataFormat(format.getFormat("yyyy/m/dhh:mm:ss"));this.target.setCellStyle(style);this.target.setCellValue(value);}public void setCellValue(double value) {CellStyle style = this.wb.createCellStyle();DataFormat format = wb.createDataFormat();style.setDataFormat(format.getFormat("###,##0"));this.target.setCellStyle(style);this.target.setCellValue(value);}public void setCellStyle(CellStyle style){this.target.setCellStyle(style);}}public static final class Sheet{private Workbook wb;private ermodel.Sheet sheet;private Sheet(Workbook wb, ermodel.Sheet sheet) {this.sheet = sheet;this.wb = wb;}public void setColumnWidth(int column, int width){sheet.setColumnWidth(column, width);}public Cell getOrCreateCell(int rowBasedZero, int cellBasedZero) {Row row = this.sheet.getRow(rowBasedZero);if (null == row) {row = this.sheet.createRow(rowBasedZero);}return new Cell(this.wb, row.getCell(cellBasedZero, Row.CREATE_NULL_AS_BLANK));}//合并单元格public void mergedRegion(int intFirstRow, int intLastRow, int intFirstColumn, int intLastColumn){this.sheet.addMergedRegion(newCellRangeAddress(intFirstRow, intLastRow, intFirstColumn, intLastColumn));}//添加居中的样式public CellStyle addStyle(){CellStyle style = wb.createCellStyle();style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直style.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平return style;}}private Map<String, Sheet> sheetMap= new HashMap<String, Sheet>();private OutputStream out;private Workbook wb;public ExcelWriter(OutputStream out) {this.out = out;wb = new XSSFWorkbook();}public Sheet getOrCreateSheet(String sheet) {Sheet sheet1 = this.sheetMap.get(sheet);if (null != sheet1) {return sheet1;}ermodel.Sheet xlsSheet = this.wb.getSheet(sheet);if (null == xlsSheet) {xlsSheet = this.wb.createSheet(sheet);}Sheet obj = new Sheet(this.wb, xlsSheet);this.sheetMap.put(sheet, obj);return obj;}public void write() throws IOException {this.wb.write(this.out);}public void close() {this.sheetMap.clear();IOUtils.closeQuietly(this.out);}}。