《springboot中实现excel表格导出》

《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>

@RestControllerpublicclassExcelController{@GetMapping("/export")publicvoidexportExcel(HttpServletResponse response)throwsException{// 创建Excel文档XSSFWorkbook workbook =newXSSFWorkbook();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privateList<User>getUserList(){List<User> users =newArrayList<>();
    users.add(newUser("张三",25,"男"));
    users.add(newUser("李四",30,"女"));
    users.add(newUser("王五",28,"男"));return users;}// 用户实体类privatestaticclassUser{privateString name;privateint age;privateString gender;publicUser(String name,int age,String gender){this.name = name;this.age = age;this.gender = gender;}publicStringgetName(){return name;}publicvoidsetName(String name){this.name = name;}publicintgetAge(){return age;}publicvoidsetAge(int age){this.age = age;}publicStringgetGender(){return gender;}publicvoidsetGender(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>

@RestControllerpublicclassExcelController{@GetMapping("/export")publicvoidexportExcel(HttpServletResponse response)throwsException{// 创建Excel文档Workbook workbook =ExcelExportUtil.exportExcel(newExportParams("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privateList<User>getUserList(){List<User> users =newArrayList<>();
    users.add(newUser("张三",25,"男"));
    users.add(newUser("李四",30,"女"));
    users.add(newUser("王五",28,"男"));return users;}// 用户实体类privatestaticclassUser{@Excel(name ="姓名", orderNum ="0")privateString name;@Excel(name ="年龄", orderNum ="1")privateint age;@Excel(name ="性别", orderNum ="2")privateString gender;publicUser(String name,int age,String gender){this.name = name;this.age = age;this.gender = gender;}publicStringgetName(){return name;}publicvoidsetName(String name){this.name = name;}publicintgetAge(){return age;}publicvoidsetAge(int age){this.age = age;}publicStringgetGender(){return gender;}publicvoidsetGender(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>

@RestControllerpublicclassExcelController{@GetMapping("/export")publicvoidexportExcel(HttpServletResponse response)throwsException{// 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 =newHashMap<>();
    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privateList<User>getUserList(){List<User> users =newArrayList<>();
    users.add(newUser("张三",25,"男"));
    users.add(newUser("李四",30,"女"));
    users.add(newUser("王五",28,"男"));return users;}// 用户实体类privatestaticclassUser{privateString name;privateint age;privateString gender;publicUser(String name,int age,String gender){this.name = name;this.age = age;this.gender = gender;}publicStringgetName(){return name;}publicvoidsetName(String name){this.name = name;}publicintgetAge(){return age;}publicvoidsetAge(int age){this.age = age;}publicStringgetGender(){return gender;}publicvoidsetGender(String gender){this.gender = gender;}}}