JAVA中EXLS导出功能实现 - 代码

public void exportExl() throws Exception{
        String text = (String) super.getRequest().getParameter("text");
        String flowid="051021";//(String)super.getRequest().getParameter("flowid");
        
         ResultPage resulta=queryDataService.getexportkey(flowid, text);
         //获取主键属性
         List<String> list=resulta.getExportlist();
         //获取修改属性
         List<String> reviselist=resulta.getExportreviselist();
         //获取属性中文
         List<String>cnlist=resulta.getExportkeycnlist();
         //获取已选择数据
         List datalist=resulta.getList();
         //装载主键信息及数据
         /**
          * 装载的数据类型为List<List<String>>
          */
         List<List<String>> data=new ArrayList();
         for(int i=0;i<datalist.size();i++){
             Map map=(Map)datalist.get(i);
             List<String> datas=new ArrayList();
             for(int n=0;n<list.size();n++){
                 String key=list.get(n);
                 String value=String.valueOf(map.get(key));
                 datas.add(value);
             }
             data.add(datas);
         }
         List<List<String>> revisedata=new ArrayList();
         for(int i=0;i<datalist.size();i++){
             Map map=(Map)datalist.get(i);
             List<String> revise=new ArrayList();
             for(int n=0;n<reviselist.size();n++){
                 String key=reviselist.get(n);
                // System.out.println("key>>>>>>>>>"+key);
                 String value=String.valueOf(map.get(key));
                 revise.add(value);
             }
             revisedata.add(revise);
         }
         
         
        HttpServletResponse response=super.getResponse();
        ServletOutputStream out=null;
        response.setContentType("applicatin/vnd.ms-excel");
        
         HSSFWorkbook workbook = new HSSFWorkbook();//创建Excel文件(Workbook)
         
         //设置表名
         String classname="基础调整-"+text+"";
         //表名导出中文格式化
         String name=new String(classname.getBytes("gbk"),"iso-8859-1");
         
         response.setHeader("content-disposition", "attchment;filename="+name+".xls");
         HSSFSheet sheet = workbook.createSheet("基础调整");//创建工作表(Sheet)
         try {
                  //创建表头属性   第一行
                  sheet.setColumnWidth(0, 5120);//设置第i列的宽度是31个字符宽度
                  HSSFRow row = sheet.createRow(0);
                  for(int n=0;n<cnlist.size();n++){
                     String cnkeys=cnlist.get(n);
                     HSSFCellStyle style=workbook.createCellStyle();
                    
                     style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//水平居中
                     style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//垂直居中
                      HSSFFont font = workbook.createFont();
                        font.setFontName("仿宋");//设置字体名称
                        
                        font.setFontHeightInPoints((short)12);//设置字号
                       font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//粗体显示
                    
                    style.setFont(font);
                    //列
                    HSSFCell cell = row.createCell(n);
                    
                    cell.setCellValue(cnkeys);
                    cell.setCellStyle(style);
                  }
                  //创建剩下行并添加值
                 for (int i=1;i<data.size()+1;i++){
                    List<String> strings = data.get(i-1);
                    //行
                    row = sheet.createRow(i);
                    sheet.setColumnWidth(i, 5120);//设置第i列的宽度是31个字符宽度
                    //System.out.println("strings>>>>>>>>>"+data.size());
                    //添加主键列数据
                   for (int j=0;j<strings.size();j++){
                       
                       HSSFCellStyle style=workbook.createCellStyle();
                       
                       style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//水平居中
                       style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//垂直居中
                         HSSFFont font = workbook.createFont();
                            font.setFontName("仿宋");//设置字体名称
                            
                            font.setFontHeightInPoints((short)12);//设置字号
                           font.setColor(HSSFColor.RED.index);//设置字体颜色
                        
                        style.setFont(font);
                        String str= strings.get(j);
                        //列
                        HSSFCell cell = row.createCell(j);
                        
                        cell.setCellValue(str);
                        cell.setCellStyle(style);
                    }
                   //添加可修改属性数据
                   int k=list.size();
                       //System.out.println("revisedata>>>>>>>>>"+revisedata.size());
                       Object obj=JSONArray.fromObject(revisedata);
                       System.out.println("revisedata>>>>>>>>>"+obj.toString());
                     
                         List<String> str= revisedata.get(i-1);
                                for(int w=0;w<str.size();w++){
                                            HSSFCellStyle style=workbook.createCellStyle();
                                               style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//水平居中
                                               style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//垂直居中
                                            HSSFFont font = workbook.createFont();
                                            font.setFontName("仿宋");//设置字体名称
                                            font.setFontHeightInPoints((short)12);//设置字号
                                            style.setFont(font);
                                        HSSFCell cell = row.createCell(k++);
                                        String value=str.get(w);
                                        cell.setCellValue(value);
                                        cell.setCellStyle(style);
                                }
                         }
               //添加尾部 备注
                 HSSFRow lastrow = sheet.createRow(data.size()+2);
                 HSSFCell cells=lastrow.createCell(0);
                 HSSFCellStyle styles=workbook.createCellStyle();
                       
                   styles.setAlignment(HSSFCellStyle.ALIGN_CENTER);//水平居中
                   styles.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//垂直居中
                     HSSFFont font = workbook.createFont();
                        font.setFontName("仿宋");//设置字体名称
                        
                        font.setFontHeightInPoints((short)20);//设置字号
                       font.setColor(HSSFColor.RED.index);//设置字体颜色
                    
                    styles.setFont(font);
                 cells.setCellValue("备注：红色字体区域为不可更改主键。请不要修改，以免发生错误，谢谢！");
                 cells.setCellStyle(styles);
                 CellRangeAddress region=new CellRangeAddress(data.size()+2,data.size()+2, 0, cnlist.size());
                 sheet.addMergedRegion(region);
                 
                out=response.getOutputStream();
                // FileOutputStream out = new FileOutputStream(filePath);
                workbook.write(out);//保存Excel文件
        } catch (IOException e) {
            // TODO: handle exception
            System.out.println("导出失败!");
        }finally{
            try {
                out.flush();
                out.close();//关闭文件流
            } catch (Exception e) {
                // TODO: handle exception
            }
            
        }
        
        
         System.out.println("OK!");
                
    }