Android利用jxl通过已有xls文件导出excel文件，并将数据添加至新的excel文件

 1 public class InformationActivity extends AppCompatActivity {
 2     private List<persion> persionList=new ArrayList<persion>();
 3     //查看excel表按钮
 4     private Button mLookExcel;
 5     @Override
 6     protected void onCreate(Bundle savedInstanceState) {
 7         super.onCreate(savedInstanceState);
 8         setContentView(R.layout.activity_information);
 9         Dao dao=new Dao(InformationActivity.this);
10         persionList=dao.Query(username);//此处是Sqlite查询语句，通过username查询，此处不再作展示
11     　　//查看excel表格
12         mLookExcel=findViewById(R.id.Look_excel);
13         mLookExcel.setOnClickListener(new View.OnClickListener() {
14             @Override
15             public void onClick(View v) {
16                 AssetManager assetManager = getAssets();
17                 WritableWorkbook wwb=null;
18                 try{
19                     Workbook wb=Workbook.getWorkbook(assetManager.open("体温.xls"));
20                     Sheet sheet=wb.getSheet(0);
21                     wwb=Workbook.createWorkbook(new File("/sdcard/ExportExcel/mine.xls"),wb);
22                     Toast.makeText(InformationActivity.this,"体温表复制成功",Toast.LENGTH_SHORT).show();
23                     //获取一个sheet
24                     WritableSheet writableSheet=wwb.getSheet(0);
25 
26                     Label lable1 = new Label(1, 1, "username");
27                     Label lable2 = new Label(5, 1, "userid");
28                     Label lable3 = new Label(1, 2, "userclass");
29                     Label lable4 = new Label(5, 2, "userphone");
30                     writableSheet.addCell(lable1);
31                     writableSheet.addCell(lable2);
32                     writableSheet.addCell(lable3);
33                     writableSheet.addCell(lable4);
34 
35                     int i=0;
36                     for(persion list:persionList){
37                             Label lable5 = new Label(0, 5+i, list.date);
38                             Label lable6 = new Label(1, 5+i, list.time);
39                             Label lable7 = new Label(2, 5+i, list.temperature);
40                             Label lable8 = new Label(3, 5+i, list.instruction);
41                             Label lable9 = new Label(5, 5+i, list.local);
42                             writableSheet.addCell(lable5);
43                             writableSheet.addCell(lable6);
44                             writableSheet.addCell(lable7);
45                             writableSheet.addCell(lable8);
46                             writableSheet.addCell(lable9);
47                             i++;
48                     }
49                     wwb.write();
50                     wwb.close();
51                     wb.close();
52                 }catch (Exception e){
53                     e.printStackTrace();
54                 }
55             }
56         });
57     }
58 }