Java Web利用POI导出Excel简单例子

采用Spring mvc架构： 
Controller层代码如下

1. @Controller
2. public class StudentExportController{
3. @Autowired
4. private StudentExportService studentExportService;
5. @RequestMapping(value = "/excel/export")
6. public void exportExcel(HttpServletRequest request, HttpServletResponse response)
7. throws Exception {
8. List<Student> list = new ArrayList<Student>();
9. list.add(new Student(1000,"zhangsan","20"));
10. list.add(new Student(1001,"lisi","23"));
11. list.add(new Student(1002,"wangwu","25"));
12. HSSFWorkbook wb = studentExportService.export(list);
13. response.setContentType("application/vnd.ms-excel");
14. response.setHeader("Content-disposition", "attachment;filename=student.xls");
15. OutputStream ouputStream = response.getOutputStream();
16. wb.write(ouputStream);
17. ouputStream.flush();
18. ouputStream.close();
19. }
20. }

Service层代码如下：

1. @Service
2. public class StudentExportService {
3. String[] excelHeader = { "Sno", "Name", "Age"};
4. public HSSFWorkbook export(List<Student> list) {
5. HSSFWorkbook wb = new HSSFWorkbook();
6. HSSFSheet sheet = wb.createSheet("Student");
7. HSSFRow row = sheet.createRow((int) 0);
8. HSSFCellStyle style = wb.createCellStyle();
9. style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
10. for (int i = 0; i < excelHeader.length; i++) {
11. HSSFCell cell = row.createCell(i);
12. cell.setCellValue(excelHeader[i]);
13. cell.setCellStyle(style);
14. sheet.autoSizeColumn(i);
15. // sheet.SetColumnWidth(i, 100 * 256);
16. }
17. for (int i = 0; i < list.size(); i++) {
18. row = sheet.createRow(i + 1);
19. Student student = list.get(i);
20. row.createCell(0).setCellValue(student.getSno());
21. row.createCell(1).setCellValue(student.getName());
22. row.createCell(2).setCellValue(student.getAge());
23. }
24. return wb;
25. }
26. }

前台的js代码如下：

1. <script>
2. function exportExcel(){
3. location.href="excel/export";
4. <!--这里不能用ajax请求，ajax请求无法弹出下载保存对话框-->
5. }
6. </script>