《springboot中实现excel表格导出》

简介

在Spring Boot中，实现Excel表格导出的方式有很多种，以下是几种常见的方法：

  1. 使用Apache POI：Apache POI是一个开源的Java API，用于处理Microsoft Office文档格式，包括Excel电子表格。在Spring Boot中，可以使用Apache POI创建Excel文档，并将其写入HTTP响应中，以实现Excel表格的导出。
  2. 使用EasyPOI：EasyPOI是一个开源的Java API，用于处理Excel电子表格。它基于Apache POI和Jxls开发，提供了更加简单易用的API，可以帮助我们快速实现Excel表格的导出。
  3. 使用Jxls：Jxls是一个用于生成Excel报表的Java库。在Spring Boot中，可以使用Jxls创建Excel文档，并将其写入HTTP响应中，以实现Excel表格的导出。
  4. 使用第三方库：还有其他一些第三方的Java库可以用于生成Excel电子表格，例如Aspose.Cells、JExcelApi等，它们也可以在Spring Boot中使用，实现Excel表格的导出。

需要注意的是，无论使用哪种方法，都需要将Excel文档写入HTTP响应中，并设置正确的Content-Type和Content-Disposition头信息，以确保浏览器能够正确地识别Excel文档并下载它。

一、Apache POI

  • maven依赖坐标
<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>
@RestControllerpublic class ExcelController {@GetMapping("/export")public void exportExcel(HttpServletResponse response) throws Exception {// 创建Excel文档XSSFWorkbook workbook = new XSSFWorkbook();XSSFSheet sheet = workbook.createSheet("Sheet1");// 创建表头XSSFRow header = sheet.createRow(0);header.createCell(0).setCellValue("姓名");header.createCell(1).setCellValue("年龄");header.createCell(2).setCellValue("性别");// 填充数据List<User> users = getUserList();int rowIndex = 1;for (User user : users) {XSSFRow row = sheet.createRow(rowIndex++);row.createCell(0).setCellValue(user.getName());row.createCell(1).setCellValue(user.getAge());row.createCell(2).setCellValue(user.getGender());}// 设置响应头信息response.setContentType("application/vnd.ms-excel");response.setHeader("Content-Disposition", "attachment; filename=users.xlsx");// 将Excel文档写入响应流中ServletOutputStream outputStream = response.getOutputStream();workbook.write(outputStream);outputStream.flush();outputStream.close();}// 模拟获取用户数据private List<User> getUserList() {List<User> users = new ArrayList<>();users.add(new User("张三", 25, "男"));users.add(new User("李四", 30, "女"));users.add(new User("王五", 28, "男"));return users;}// 用户实体类private static class User {private String name;private int age;private String gender;public User(String name, int age, String gender) {this.name = name;this.age = age;this.gender = gender;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getGender() {return gender;}public void setGender(String gender) {this.gender = gender;}}}

二、Easy POI

  • maven依赖坐标
<dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-base</artifactId><version>4.2.0</version></dependency><dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-web</artifactId><version>4.2.0</version></dependency>
@RestControllerpublic class ExcelController {@GetMapping("/export")public void exportExcel(HttpServletResponse response) throws Exception {// 创建Excel文档Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams("用户列表", "用户信息"), User.class, getUserList());// 设置响应头信息response.setContentType("application/vnd.ms-excel");response.setHeader("Content-Disposition", "attachment; filename=users.xlsx");// 将Excel文档写入响应流中ServletOutputStream outputStream = response.getOutputStream();workbook.write(outputStream);outputStream.flush();outputStream.close();}// 模拟获取用户数据private List<User> getUserList() {List<User> users = new ArrayList<>();users.add(new User("张三", 25, "男"));users.add(new User("李四", 30, "女"));users.add(new User("王五", 28, "男"));return users;}// 用户实体类private static class User {@Excel(name = "姓名", orderNum = "0")private String name;@Excel(name = "年龄", orderNum = "1")private int age;@Excel(name = "性别", orderNum = "2")private String gender;public User(String name, int age, String gender) {this.name = name;this.age = age;this.gender = gender;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getGender() {return gender;}public void setGender(String gender) {this.gender = gender;}}}

三、Jxls

  • maven依赖坐标
<dependency><groupId>org.jxls</groupId><artifactId>jxls</artifactId><version>2.14.0</version></dependency><dependency><groupId>org.jxls</groupId><artifactId>jxls-poi</artifactId><version>2.14.0</version></dependency>
@RestControllerpublic class ExcelController {@GetMapping("/export")public void exportExcel(HttpServletResponse response) throws Exception {// 加载Excel模板InputStream inputStream = getClass().getResourceAsStream("/templates/user_template.xlsx");Workbook workbook = WorkbookFactory.create(inputStream);// 填充数据List<User> users = getUserList();Map<String, Object> model = new HashMap<>();model.put("users", users);JxlsHelper.getInstance().processTemplate(model, workbook.getSheetAt(0));// 设置响应头信息response.setContentType("application/vnd.ms-excel");response.setHeader("Content-Disposition", "attachment; filename=users.xlsx");// 将Excel文档写入响应流中ServletOutputStream outputStream = response.getOutputStream();workbook.write(outputStream);outputStream.flush();outputStream.close();}// 模拟获取用户数据private List<User> getUserList() {List<User> users = new ArrayList<>();users.add(new User("张三", 25, "男"));users.add(new User("李四", 30, "女"));users.add(new User("王五", 28, "男"));return users;}// 用户实体类private static class User {private String name;private int age;private String gender;public User(String name, int age, String gender) {this.name = name;this.age = age;this.gender = gender;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getGender() {return gender;}public void setGender(String gender) {this.gender = gender;}}}