读取并创建excel文件（.xls）

第三方库，附件

缺点：该库只支持.xls文件的操作

1、读取excel文件

例子：

            try {
                /**
                 * 后续考虑问题,比如Excel里面的图片以及其他数据类型的读取
                 **/
                InputStream is = new FileInputStream(path);
                Workbook book = Workbook.getWorkbook(is);
                
                int num = book.getNumberOfSheets();
                publishProgress("the num of sheets is " + num+ "\n");
                
                if (num <2) {
                    return -2;
                }
                
                // 获得第一个工作表对象:时间，电流值
                Sheet sheet = book.getSheet(0);
                int Rows = sheet.getRows();

                int Cols = sheet.getColumns();

                                
                publishProgress("the name of sheet 1 is " + sheet.getName() + "\n");
                publishProgress("total rows is " + Rows + "\n");
                publishProgress("total cols is " + Cols + "\n");
                
                if (Cols != 2) {
                    publishProgress("第一个工作表格式错误，第一列为时间（13位时间戳），第二列为电流值，导入停止");
                    return -2;
               }
                
                for (int i = 0; i < Rows; i++) {
                   String str1 = sheet.getCell(0,i).getContents();
                   if (str1 == null || str1.isEmpty() || str1.length()!=13) {
                       continue;
                   }
                   
                   long longStr1 = -1L;
                   try {
                       longStr1 = Long.parseLong(str1);
                   } catch (Exception e) {
                   }
                   
                   
                   String str2 = sheet.getCell(1,i).getContents();
                   if (str2 == null || str2.isEmpty()) {
                       continue;
                   }
                   
                   float floatStr2 = -2F;
                   try {
                       floatStr2 = Float.parseFloat(str2);
                   } catch (Exception e) {
                   }
                   
                   
                   if (longStr1 == -1 || floatStr2 == -2F) {
                       continue;
                   }
                   
                   publishProgress("contents:" + longStr1+","+ floatStr2 + "\n");
                   
                   //插入血糖
                   GlucoseData vData = new GlucoseData();
                   vData.setGlucoseElecValue(floatStr2);
                   vData.setGlucoseTime(new Date(longStr1));
                   vData.setGlucoseValue(-1F);
                   vDataDao.insert(vData);
                   
                }
                
                // 获得第二个工作表对象:时间，血糖值
                sheet = book.getSheet(1);
                Rows = sheet.getRows();
                Cols = sheet.getColumns();                
                publishProgress("the name of sheet 2 is " + sheet.getName() + "\n");
                publishProgress("total rows is " + Rows + "\n");
                publishProgress("total cols is " + Cols + "\n");
                
                if (Cols != 2) {
                    publishProgress("第二个工作表格式错误，第一列为时间（13位时间戳），第二列为参比血糖值，导入停止");
                    return -2;
               }
                
                for (int i = 0; i < Rows; i++) {
                   String str1 = sheet.getCell(0,i).getContents();
                   if (str1 == null || str1.isEmpty() || str1.length()!=13) {
                       continue;
                   }
                   
                   long longStr1 = -1L;
                   try {
                       longStr1 = Long.parseLong(str1);
                   } catch (Exception e) {
                   }
                   
                   
                   String str2 = sheet.getCell(1,i).getContents();
                   if (str2 == null || str2.isEmpty()) {
                       continue;
                   }
                   
                   float floatStr2 = -2F;
                   try {
                       floatStr2 = Float.parseFloat(str2);
                   } catch (Exception e) {
                   }
                   
                   
                   if (longStr1 == -1 || floatStr2 == -2F) {
                       continue;
                   }
                   
                   publishProgress("contents:" + longStr1+","+ floatStr2 + "\n");
                   
                   //插入血糖
                   GlucoseRefData vData = new GlucoseRefData();
                   vData.setGlucoseRefValue(floatStr2);
                   vData.setGlucoseRefTime(new Date(longStr1));
                   vGlucoseRefData.insert(vData);            
                }         
                
                book.close();
                
                publishProgress("完成数据导入\n");                
                return 0;
                
               } catch (Exception e) {
                   publishProgress(e.toString());
                   return -1;
               }

2、生成Excel

              try {  
                  // 创建或打开Excel文件  
                  WritableWorkbook book = Workbook.createWorkbook(new File(mResultPath));  
                                    
                  // 生成名为“第一页”的工作表,参数0表示这是第一页  
                  WritableSheet sheet1 = book.createSheet("result", 0); 
                  
                  List<GlucoseData> vList = vDataDao.loadAll();
                  if (vList!=null) {
                    for (int i = 0; i < vList.size(); i++) {                        
                        jxl.write.Number number2 = new jxl.write.Number(0, i,vList.get(i).getGlucoseTime().getTime());
                        sheet1.addCell(number2);
                        
                        jxl.write.Number number3 = new jxl.write.Number(1, i,vList.get(i).getGlucoseElecValue());
                        sheet1.addCell(number3);
                        
                        jxl.write.Number number = new jxl.write.Number(2, i,vList.get(i).getGlucoseValue());
                        sheet1.addCell(number);
                    }
                  }
                   
                  // 写入数据并关闭文件  
                  book.write();  
                  book.close();  
                  
                 } catch (Exception e) {  
                     Log.d("algorithm", "WritableWorkbook exception: "+e.toString());
                     publishProgress("WritableWorkbook exception: "+e.toString());
                     
                     return -3;
                 }  

来自为知笔记(Wiz)

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