java导入导出excel操作

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：。

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！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<!-- Apache POI --><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实现Excel导⼊导出以及excel样式设置JAVA实现Excel导⼊/导出以及excel样式设置图2.1 POI的⽬录结构 POI使⽤初步 POI提供给⽤户使⽤的对象在ermodel包中,主要部分包括Excel对象、样式和格式，还有辅助操作等。

最主要的⼏个对象如表3.1所⽰： 表3.1 POI主要对象POI对象名称对应的Excel对象HSSFWorkbook⼯作簿HSSFSheet⼯作表HSSFRow⾏HSSFCell单元格 下⾯我们来看如下的例⼦，使⽤表3.1中的对象在程序的当前⽬录下创建⼀个Excel⽂件test.xls，在第⼀个单元格中写⼊内容，然后读出第⼀个单元格的内容。

完整的程序如下：import ermodel.HSSFWorkbook;import ermodel.HSSFSheet;import ermodel.HSSFRow;import ermodel.HSSFCell;import java.io.FileOutputStream;import java.io.FileInputStream;public class CreateXL{　public static String xlsFile="test.xls"; //产⽣的Excel⽂件的名称　public static void main(String args[])　{ try { HSSFWorkbook workbook = new HSSFWorkbook(); //产⽣⼯作簿对象 HSSFSheet sheet = workbook.createSheet(); //产⽣⼯作表对象 //设置第⼀个⼯作表的名称为firstSheet //为了⼯作表能⽀持中⽂，设置字符编码为UTF_16 workbook.setSheetName(0,"firstSheet",HSSFWorkbook.ENCODING_UTF_16); //产⽣⼀⾏ HSSFRow row = sheet.createRow((short)0); //产⽣第⼀个单元格 HSSFCell cell = row.createCell((short) 0); //设置单元格内容为字符串型 cell.setCellType(HSSFCell.CELL_TYPE_STRING); //为了能在单元格中写⼊中⽂，设置字符编码为UTF_16。

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实现⼤批量数据导⼊导出（100W以上）　-（⼆）导出使⽤POI或JXLS导出⼤数据量（百万级）Excel报表常常⾯临两个问题：1. 服务器内存溢出；2. ⼀次从数据库查询出这么⼤数据，查询缓慢。

当然也可以分页查询出数据，分别⽣成多个Excel打包下载，但这种⽣成还是很缓慢。

⼤数据量导⼊请参考：那么如何解决呢？我们可以借助XML格式利⽤模板替换，分页查询出数据从磁盘写⼊XML，最终会以Excel多sheet形式⽣成。

亲测2400万⾏数据，⽣成Excel⽂件4.5G，总耗时1.5分钟。

我利⽤StringTemplate模板解析技术对XML模板进⾏填充。

当然也可以使⽤FreeMarker, Velocity等Java模板技术实现。

⾸先引⼊StringTemplate所需Jar包：使⽤技术为 stringTemplatepom.xml：1 <dependency>2<groupId>antlr</groupId>3<artifactId>antlr</artifactId>4<version>2.7.7</version>5</dependency>67<dependency>8<groupId>org.antlr</groupId>9<artifactId>stringtemplate</artifactId>10<version>3.2.1</version>11</dependency>⾸先准备导出Excel模板，然后打开－》另存为－》选择格式为XML，然后⽤⽂本打开XML,提取XML头模板(head.st可通⽤)，数据体模板(boday.st):head.st可通⽤:1<?xml version="1.0"?>2<?mso-application progid="Excel.Sheet"?>3<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"4 xmlns:o="urn:schemas-microsoft-com:office:office"5 xmlns:x="urn:schemas-microsoft-com:office:excel"6 xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"7 xmlns:html="/TR/REC-html40">8<DocumentProperties xmlns="urn:schemas-microsoft-com:office:office">9<Created>1996-12-17T01:32:42Z</Created>10<LastSaved>2013-08-02T09:21:24Z</LastSaved>11<Version>11.9999</Version>12</DocumentProperties>13<OfficeDocumentSettings xmlns="urn:schemas-microsoft-com:office:office">14<RemovePersonalInformation/>15</OfficeDocumentSettings>16<ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">17<WindowHeight>4530</WindowHeight>18<WindowWidth>8505</WindowWidth>19<WindowTopX>480</WindowTopX>20<WindowTopY>120</WindowTopY>21<AcceptLabelsInFormulas/>22<ProtectStructure>False</ProtectStructure>23<ProtectWindows>False</ProtectWindows>24</ExcelWorkbook>25<Styles>26<Style ss:ID="Default" ss:Name="Normal">27<Alignment ss:Vertical="Bottom"/>28<Borders/>29<Font ss:FontName="宋体" x:CharSet="134" ss:Size="12"/>30<Interior/>31<NumberFormat/>32<Protection/>33</Style>34</Styles>boday.st:1 $worksheet:{2<Worksheet ss:Name="$it.sheet$">3<Table ss:ExpandedColumnCount="$it.columnNum$" ss:ExpandedRowCount="$it.rowNum$" x:FullColumns="1"4 x:FullRows="1" ss:DefaultColumnWidth="54" ss:DefaultRowHeight="14.25">5 $it.rows:{6<Row>7<Cell><Data ss:Type="String">$1$</Data></Cell>8<Cell><Data ss:Type="String">$2$</Data></Cell>9<Cell><Data ss:Type="String">$3$</Data></Cell>10</Row>11 }$12</Table>13</Worksheet>14 }$⽣成⼤数据量Excel类：ExcelGenerator:1package test.exportexcel;23import org.antlr.stringtemplate.StringTemplate;4import org.antlr.stringtemplate.StringTemplateGroup;5import test.exportexcel.bean.Row;6import test.exportexcel.bean.Worksheet;78import java.io.*;9import java.util.ArrayList;10import java.util.List;11import java.util.Random;1213/**14 * 类功能描述：generator big data Excel15 *16 * @author WangXueXing create at 19-4-13 下午10:2317 * @version 1.0.018*/19public class ExcelGenerator {20public static void main(String[] args) throws FileNotFoundException{21 ExcelGenerator template = new ExcelGenerator();22 template.output2();23 }2425/**26 * ⽣成数据量⼤的时候，该⽅法会出现内存溢出27 * @throws FileNotFoundException28*/29public void output1() throws FileNotFoundException{30 StringTemplateGroup stGroup = new StringTemplateGroup("stringTemplate");31 StringTemplate st4 = stGroup.getInstanceOf("test/exportexcel/template/test");32 List<Worksheet> worksheets = new ArrayList<>();3334 File file = new File("/home/barry/data/output.xls");35 PrintWriter writer = new PrintWriter(new BufferedOutputStream(new FileOutputStream(file)));3637for(int i=0;i<30;i++){38 Worksheet worksheet = new Worksheet();39 worksheet.setSheet("第"+(i+1)+"页");40 List<Row> rows = new ArrayList<>();41for(int j=0;j<6000;j++){42 Row row = new Row();43 row.setName1("zhangzehao");44 row.setName2(""+j);45 row.setName3(i+" "+j);46 rows.add(row);47 }48 worksheet.setRows(rows);49 worksheets.add(worksheet);50 }5152 st4.setAttribute("worksheets", worksheets);53 writer.write(st4.toString());54 writer.flush();55 writer.close();56 System.out.println("⽣成excel完成");57 }5859/**60 * 该⽅法不管⽣成多⼤的数据量，都不会出现内存溢出，只是时间的长短61 * 经测试，⽣成2400万数据，2分钟内，4.5G⼤的⽂件，打开⼤⽂件就看内存是否⾜够⼤了62 * 数据量⼩的时候，推荐⽤JXLS的模板技术⽣成excel⽂件，谁⽤谁知道，⼤数据量可以结合该⽅法使⽤63 * @throws FileNotFoundException64*/65public void output2() throws FileNotFoundException{66long startTimne = System.currentTimeMillis();67 StringTemplateGroup stGroup = new StringTemplateGroup("stringTemplate");6869//写⼊excel⽂件头部信息70 StringTemplate head = stGroup.getInstanceOf("test/exportexcel/template/head");71 File file = new File("/home/barry/data/output.xls");72 PrintWriter writer = new PrintWriter(new BufferedOutputStream(new FileOutputStream(file)));73 writer.print(head.toString());74 writer.flush();7576int sheets = 400;77//excel单表最⼤⾏数是6553578int maxRowNum = 60000;7980//写⼊excel⽂件数据信息81for(int i=0;i<sheets;i++){82 StringTemplate body = stGroup.getInstanceOf("test/exportexcel/template/body");83 Worksheet worksheet = new Worksheet();84 worksheet.setSheet(" "+(i+1)+" ");85 worksheet.setColumnNum(3);86 worksheet.setRowNum(maxRowNum);87 List<Row> rows = new ArrayList<>();88for(int j=0;j<maxRowNum;j++){89 Row row = new Row();90 row.setName1(""+new Random().nextInt(100000));91 row.setName2(""+j);92 row.setName3(i+""+j);93 rows.add(row);94 }95 worksheet.setRows(rows);96 body.setAttribute("worksheet", worksheet);97 writer.print(body.toString());98 writer.flush();99 rows.clear();100 rows = null;101 worksheet = null;102 body = null;103 Runtime.getRuntime().gc();104 System.out.println("正在⽣成excel⽂件的 sheet"+(i+1));105 }106107//写⼊excel⽂件尾部108 writer.print("</Workbook>");109 writer.flush();110 writer.close();111 System.out.println("⽣成excel⽂件完成");112long endTime = System.currentTimeMillis();113 System.out.println("⽤时="+((endTime-startTimne)/1000)+"秒");114 }115 }定义JavaBean:WorkSheet.java:1package test.exportexcel.bean;23import java.util.List;45/**6 * 类功能描述：Excel sheet Bean7 *8 * @author WangXueXing create at 19-4-13 下午10:219 * @version 1.0.010*/11public class Worksheet {12private String sheet;13private int columnNum;14private int rowNum;15private List<Row> rows;1617public String getSheet() {18return sheet;19 }20public void setSheet(String sheet) {21this.sheet = sheet;22 }2324public List<Row> getRows() {25return rows;26 }27public void setRows(List<Row> rows) {28this.rows = rows;29 }3031public int getColumnNum() {32return columnNum;33 }34public void setColumnNum(int columnNum) {35this.columnNum = columnNum;36 }3738public int getRowNum() {39return rowNum;40 }41public void setRowNum(int rowNum) {42this.rowNum = rowNum;43 }44 }Row.java:1package test.exportexcel.bean;23/**4 * 类功能描述：Excel row bean5 *6 * @author WangXueXing create at 19-4-13 下午10:227 * @version 1.0.08*/9public class Row {10private String name1;11private String name2;12private String name3;1314public String getName1() {15return name1;16 }17public void setName1(String name1) {1 = name1;19 }2021public String getName2() {22return name2;23 }24public void setName2(String name2) {2 = name2;26 }2728public String getName3() {29return name3;30 }31public void setName3(String name3) {3 = name3;33 }34 }另附实现源码：　此外，⼤数据量并并且Excel列较多时，会出现内存溢出。

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();}}。

hutool工具类实现的简易excel文件导出方法一、前言Excel文件作为数据存储和交换的重要工具，在各种场景下都有着广泛的应用。

然而，对于一些非专业的开发者来说，手动编写Excel 文件的导出功能可能会显得有些复杂。

为此，我们介绍一种使用hutool工具类实现的简易Excel文件导出方法。

二、hutool工具类介绍hutool是一组Java工具类的集合，提供了大量实用的功能，如文件操作、网络操作、日期时间处理等。

它具有简洁、高效、易用的特点，为开发者提供了很大的便利。

三、Excel文件导出步骤1.导入hutool库首先，需要在项目中导入hutool库，以便使用其中的功能。

可以通过Maven或Gradle等方式将其添加到项目依赖中。

2.创建Excel文件使用hutool提供的ExcelWriter类，可以很方便地创建一个Excel文件。

3.写入数据使用ExcelWriter类的write方法，可以将数据写入到Excel文件中。

支持写入各种类型的数据，如字符串、数字、日期等。

4.保存Excel文件完成数据写入后，需要调用ExcelWriter类的close方法来保存Excel文件。

四、示例代码以下是一个简单的示例代码，演示了如何使用hutool工具类实现Excel文件的导出：```javaimportcn.hutool.core.io.FileUtil;importcn.hutool.core.util.ExcelUtil;importcn.hutool.core.util.StrUtil;importjava.io.File;importjava.util.ArrayList;importjava.util.List;publicclassExcelExporter{publicstaticvoidmain(String[]args){//创建Excel文件StringfileName="example.xlsx";Filefile=FileUtil.getSingleFile(fileName);ExcelWriterwriter=newExcelWriter(file);//写入数据List<String>data1=newArrayList<>();data1.add("姓名");data1.add("年龄");writer.write(StrUtil.repeatCell("数据1",2));//写入标题行writer.write(data1);//写入数据行List<String>data2=newArrayList<>();data2.add("张三");data2.add("25");writer.write(data2);//写入数据行//关闭Excel文件writer.close();}}```五、总结使用hutool工具类实现Excel文件的导出，可以简化开发过程，提高效率。