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Excel导出学习之道:Java Web利用POI导出Excel简单例子

时间:2014-08-11 10:11:02      阅读:270      评论:0      收藏:0      [点我收藏+]

标签:excel解析   excel   java   对话框   

采用Spring mvc架构: 

Controller层代码如下 

[java] view plaincopy
  1. @Controller    
  2. public class StudentExportController{    
  3.     
  4.     @Autowired    
  5.     private StudentExportService studentExportService;    
  6.     
  7.     @RequestMapping(value = "/excel/export")    
  8.     public void exportExcel(HttpServletRequest request, HttpServletResponse response)     
  9.     throws Exception {    
  10.             
  11.         List<Student> list = new ArrayList<Student>();    
  12.         list.add(new Student(1000,"zhangsan","20"));    
  13.         list.add(new Student(1001,"lisi","23"));    
  14.         list.add(new Student(1002,"wangwu","25"));    
  15.         HSSFWorkbook wb = studentExportService.export(list);    
  16.         response.setContentType("application/vnd.ms-excel");    
  17.         response.setHeader("Content-disposition""attachment;filename=student.xls");    
  18.         OutputStream ouputStream = response.getOutputStream();    
  19.         wb.write(ouputStream);    
  20.         ouputStream.flush();    
  21.         ouputStream.close();    
  22.    }    
  23. }    

Service层代码如下: 

[java] view plaincopy
  1. @Service    
  2. public class StudentExportService {    
  3.     
  4.     String[] excelHeader = { "Sno""Name""Age"};    
  5.     public HSSFWorkbook export(List<Campaign> list) {    
  6.         HSSFWorkbook wb = new HSSFWorkbook();    
  7.         HSSFSheet sheet = wb.createSheet("Campaign");    
  8.         HSSFRow row = sheet.createRow((int0);    
  9.         HSSFCellStyle style = wb.createCellStyle();    
  10.         style.setAlignment(HSSFCellStyle.ALIGN_CENTER);    
  11.     
  12.         for (int i = 0; i < excelHeader.length; i++) {    
  13.             HSSFCell cell = row.createCell(i);    
  14.             cell.setCellValue(excelHeader[i]);    
  15.             cell.setCellStyle(style);    
  16.             sheet.autoSizeColumn(i);    
  17.         }    
  18.     
  19.         for (int i = 0; i < list.size(); i++) {    
  20.             row = sheet.createRow(i + 1);    
  21.             Student student = list.get(i);    
  22.             row.createCell(0).setCellValue(student.getSno());    
  23.             row.createCell(1).setCellValue(student.getName());    
  24.             row.createCell(2).setCellValue(student.getAge());    
  25.         }    
  26.         return wb;    
  27.     }    
  28. }    

前台的js代码如下: 

[javascript] view plaincopy
  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>    

 

 

设置Excel样式以及注意点:

[java] view plaincopy
  1. String[] excelHeader = { "所属区域(地市)""机房""机架资源情况""""""""",  
  2.     """端口资源情况""""""""""""机位资源情况""""""设备资源情况",  
  3.     """""IP资源情况""""""""""网络设备数" };  
  4. String[] excelHeader1 = { """""总量(个)""空闲(个)""预占(个)""实占(个)",  
  5.     "自用(个)""其它(个)""总量(个) ""在用(个)""空闲(个)""总带宽(M)",  
  6.     "在用带宽(M)""空闲带宽(M)""总量(个)""在用(个)""空闲(个)""设备总量(个)",  
  7.     "客户设备(个)""电信设备(个)""总量(个)""空闲(个)""预占用(个)""实占用(个)",  
  8.     "自用(个)""" };  
  9. // 单元格列宽  
  10. int[] excelHeaderWidth = { 150120100100100100100100100,  
  11.     100100120120120120120120150150150120,  
  12.     120150150120150 };  
  13.   
  14. HSSFWorkbook wb = new HSSFWorkbook();  
  15. HSSFSheet sheet = wb.createSheet("机房报表统计");  
  16. HSSFRow row = sheet.createRow((int0);  
  17. HSSFCellStyle style = wb.createCellStyle();  
  18. // 设置居中样式  
  19. style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 水平居中  
  20. style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); // 垂直居中  
  21.   
  22. // 设置合计样式  
  23. HSSFCellStyle style1 = wb.createCellStyle();  
  24. Font font = wb.createFont();  
  25. font.setColor(HSSFColor.RED.index);  
  26. font.setBoldweight(Font.BOLDWEIGHT_BOLD); // 粗体  
  27. style1.setFont(font);  
  28. style1.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 水平居中  
  29. style1.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); // 垂直居中  
  30.   
  31. // 合并单元格  
  32. // first row (0-based) last row (0-based) first column (0-based) last  
  33. // column (0-based)  
  34. sheet.addMergedRegion(new CellRangeAddress(0100));  
  35. sheet.addMergedRegion(new CellRangeAddress(0111));  
  36. sheet.addMergedRegion(new CellRangeAddress(0027));  
  37. sheet.addMergedRegion(new CellRangeAddress(00813));  
  38. sheet.addMergedRegion(new CellRangeAddress(001416));  
  39. sheet.addMergedRegion(new CellRangeAddress(001719));  
  40. sheet.addMergedRegion(new CellRangeAddress(002024));  
  41. sheet.addMergedRegion(new CellRangeAddress(012525));  
  42. // 设置列宽度(像素)  
  43. for (int i = 0; i < excelHeaderWidth.length; i++) {  
  44.     sheet.setColumnWidth(i, 32 * excelHeaderWidth[i]);  
  45. }  
  46.   
  47. // 添加表格头  
  48. for (int i = 0; i < excelHeader.length; i++) {  
  49.     HSSFCell cell = row.createCell(i);  
  50.     cell.setCellValue(excelHeader[i]);  
  51.     cell.setCellStyle(style);  
  52. }  
  53. row = sheet.createRow((int1);  
  54. for (int i = 0; i < excelHeader1.length; i++) {  
  55.     HSSFCell cell = row.createCell(i);  
  56.     cell.setCellValue(excelHeader1[i]);  
  57.     cell.setCellStyle(style);  
  58. }  

 

 


注意点1:合并单元格    new CellRangeAddress(int,int,int,int)

first row (0-based) ,last row (0-based), first column (0-based),last column (0-based)

 

注意点2:合并单元格

String[] excelHeader = { "所属区域(地市)", "机房", "机架资源情况", "", "", "", "","", "端口资源情况", "", "", "", "", "", "机位资源情况", "", "", "设备资源情况","", "", "IP资源情况", "", "", "", "", "网络设备数" };

合并以后的单元格虽然是一个,但是仍然要保留其单元格内容,此处用空字符串代替,否则后续表头显示不出

 

注意点3:填充单元格

正确写法:

HSSFCell cell = row.createCell(i);

cell.setCellValue(excelHeader1[i]);

cell.setCellStyle(style);

错误写法:

row.createCell(i).setCellValue(excelHeader1[i]);

row.createCell(i).setCellStyle(style);

本人为了省一个HSSFCell对象,使用了错误写法,导致HSSFCell对象创建了2次,最后只保留了样式,而内容无法显示

Excel导出学习之道:Java Web利用POI导出Excel简单例子,布布扣,bubuko.com

Excel导出学习之道:Java Web利用POI导出Excel简单例子

标签:excel解析   excel   java   对话框   

原文地址:http://blog.csdn.net/u011511429/article/details/38487271

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