Android数据转化为Excel表格导入导出

 最近需要用到把Android数据到处保存到Excel表格中，个人感觉也比较实用，所以就和大家分享一下。以前没接触过该怎么办呢？有问题找百度，只有你想不到的没有你找不到的。在网上也找到了一些例子，自己又加以完善。代码也比较容易，只需要用到一个jxl.jar包，举一反三android数据应该也能转为Word什么的，呵呵。

        Demo实现了一个简单的记账功能，点击导出账单就导出到了Excel表。点击导入账单就把Excel数据显示到Android手机上了。导出账单先把数据保存到Sqlite中然后再倒入Excel，这样做的好处是就算你把Excel表格误删了，还是能从Sqlite中读出以前的保存记录。效果图如下：

主要代码是ExcelUtils类，封装了把数据转化为Excel的工具类：

 public class ExcelUtils {
     public static WritableFont arial14font = null;

     public static WritableCellFormat arial14format = null;
     public static WritableFont arial10font = null;
     public static WritableCellFormat arial10format = null;
     public static WritableFont arial12font = null;
     public static WritableCellFormat arial12format = null;

     public final static String UTF8_ENCODING = "UTF-8";
     public final static String GBK_ENCODING = "GBK";

     public static void format() {
         try {
             arial14font = new WritableFont(WritableFont.ARIAL, 14,
                     WritableFont.BOLD);
             arial14font.setColour(jxl.format.Colour.LIGHT_BLUE);
             arial14format = new WritableCellFormat(arial14font);
             arial14format.setAlignment(jxl.format.Alignment.CENTRE);
             arial14format.setBorder(jxl.format.Border.ALL,
                     jxl.format.BorderLineStyle.THIN);
             arial14format.setBackground(jxl.format.Colour.VERY_LIGHT_YELLOW);
             arial10font = new WritableFont(WritableFont.ARIAL, 10,
                     WritableFont.BOLD);
             arial10format = new WritableCellFormat(arial10font);
             arial10format.setAlignment(jxl.format.Alignment.CENTRE);
             arial10format.setBorder(jxl.format.Border.ALL,
                     jxl.format.BorderLineStyle.THIN);
             arial10format.setBackground(jxl.format.Colour.LIGHT_BLUE);
             arial12font = new WritableFont(WritableFont.ARIAL, 12);
             arial12format = new WritableCellFormat(arial12font);
             arial12format.setBorder(jxl.format.Border.ALL,
                     jxl.format.BorderLineStyle.THIN);
         } catch (WriteException e) {

             e.printStackTrace();
         }
     }

     public static void initExcel(String fileName, String[] colName) {
         format();
         WritableWorkbook workbook = null;
         try {
             File file = new File(fileName);
             if (!file.exists()) {
                 file.createNewFile();
             }
             workbook = Workbook.createWorkbook(file);
             WritableSheet sheet = workbook.createSheet("家庭帐务表", 0);
             sheet.addCell((WritableCell) new Label(0, 0, fileName,
                     arial14format));
             for (int col = 0; col < colName.length; col++) {
                 sheet.addCell(new Label(col, 0, colName[col], arial10format));
             }
             workbook.write();
         } catch (Exception e) {
             e.printStackTrace();
         } finally {
             if (workbook != null) {
                 try {
                     workbook.close();
                 } catch (Exception e) {
                     // TODO Auto-generated catch block
                     e.printStackTrace();
                 }
             }
         }

     }

     @SuppressWarnings("unchecked")
     public static <T> void writeObjListToExcel(List<T> objList,
             String fileName, Context c) {
         if (objList != null && objList.size() > 0) {
             WritableWorkbook writebook = null;
             InputStream in = null;
             try {
                 WorkbookSettings setEncode = new WorkbookSettings();
                 setEncode.setEncoding(UTF8_ENCODING);
                 in = new FileInputStream(new File(fileName));
                 Workbook workbook = Workbook.getWorkbook(in);
                 writebook = Workbook.createWorkbook(new File(fileName),
                         workbook);
                 WritableSheet sheet = writebook.getSheet(0);
                 for (int j = 0; j < objList.size(); j++) {
                     ArrayList<String> list = (ArrayList<String>) objList.get(j);
                     for (int i = 0; i < list.size(); i++) {
                         sheet.addCell(new Label(i, j + 1, list.get(i),
                                 arial12format));
                     }
                 }
                 writebook.write();
                 Toast.makeText(c, "导出到手机存储中文件夹Family成功", Toast.LENGTH_SHORT).show();
             } catch (Exception e) {
                 e.printStackTrace();
             } finally {
                 if (writebook != null) {
                     try {
                         writebook.close();
                     } catch (Exception e) {
                         e.printStackTrace();
                     }

                 }
                 if (in != null) {
                     try {
                         in.close();
                     } catch (IOException e) {
                         e.printStackTrace();
                     }
                 }
             }

         }
     }

     public static  List<BillObject> read2DB(File f, Context con) {
         ArrayList<BillObject> billList = new ArrayList<BillObject>();
         try {
             Workbook course = null;
             course = Workbook.getWorkbook(f);
             Sheet sheet = course.getSheet(0);

             Cell cell = null;
             for (int i = 1; i < sheet.getRows(); i++) {
                 BillObject tc = new BillObject();
                 cell = sheet.getCell(1, i);
                 tc.setFood(cell.getContents());
                 cell = sheet.getCell(2, i);
                 tc.setClothes(cell.getContents());
                 cell = sheet.getCell(3, i);
                 tc.setHouse(cell.getContents());
                 cell = sheet.getCell(4, i);
                 tc.setVehicle(cell.getContents());
                 Log.d("gaolei", "Row"+i+"---------"+tc.getFood() + tc.getClothes()
                         + tc.getHouse() + tc.getVehicle());
                 billList.add(tc);

             }

         } catch (Exception e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
         return billList;
     }

     public static Object getValueByRef(Class cls, String fieldName) {
         Object value = null;
         fieldName = fieldName.replaceFirst(fieldName.substring(0, 1), fieldName
                 .substring(0, 1).toUpperCase());
         String getMethodName = "get" + fieldName;
         try {
             Method method = cls.getMethod(getMethodName);
             value = method.invoke(cls);
         } catch (Exception e) {
             e.printStackTrace();
         }
         return value;
     }
 }

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