将SQLite数据库的数据写到excel表里。

1、用java代码操作excel表需要用poi，poi导包有很多问题，不能有多余的包，可能会有重复内容；其他附带的包也不能少，会报错。

2、代码：

 1 public void makeExecl()
 2     {
 3         sqLhelper=new SQLhelper(getActivity(),"Temperature",null,1);
 4         SQLiteDatabase RsqliteDatabase=sqLhelper.getReadableDatabase();
 5         String time=new SimpleDateFormat("yyyy/MM/dd").format(new Date());
 6         Cursor c=RsqliteDatabase.rawQuery("select * from lastuser", null);
 7         c.moveToFirst();
 8         String lastname=c.getString(c.getColumnIndex("name")).toString();
 9         String lastphone=c.getString(c.getColumnIndex("phone")).toString();
10         String lastnum=c.getString(c.getColumnIndex("num")).toString();
11         c=RsqliteDatabase.rawQuery("select * from tempera where name='"+lastname+"' order by time desc", null);
12         c.moveToFirst();
13         try {
14             verifyStoragePermissions(getActivity());
15             InputStream inputStream = new FileInputStream("data/data/com.example.seanfu/14天健康登记样表.xls");
16             if(inputStream==null)
17             {
18                 Toast.makeText(getActivity(),"aaa",Toast.LENGTH_SHORT).show();
19             }else{
20                 HSSFWorkbook hssfWorkbook= new HSSFWorkbook(inputStream);
21                 HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(0);
22                 HSSFRow hssfRow2 = hssfSheet.getRow(1);
23                 HSSFRow hssfRow3 = hssfSheet.getRow(2);
24                 HSSFRow hssfRow4 = hssfSheet.getRow(3);
25                 HSSFRow hssfRow21 = hssfSheet.getRow(21);
26                 HSSFCell school = hssfRow2.getCell(1);
27                 HSSFCell timecell = hssfRow2.getCell(5);
28                 HSSFCell namecell = hssfRow3.getCell(1);
29                 HSSFCell numcell = hssfRow3.getCell(5);
30                 HSSFCell healthcell = hssfRow4.getCell(1);
31                 HSSFCell phonecell = hssfRow4.getCell(5);
32                 HSSFCell signcell = hssfRow21.getCell(2);
33                 HSSFCell signtimecell = hssfRow21.getCell(5);
34                 school.setCellValue("石家庄铁道大学");
35                 timecell.setCellValue(time);
36                 namecell.setCellValue(lastname);
37                 numcell.setCellValue(lastnum);
38                 phonecell.setCellValue(lastphone);
39                 healthcell.setCellValue(gethealth(lastnum,time));
40                 signcell.setCellValue(lastname);
41                 signtimecell.setCellValue(time);
42                 for(int i=19, t=0;i>5;i--,t++)
43                 {
44                     HSSFRow hssfRow = hssfSheet.getRow(i);
45                     HSSFCell cell = hssfRow.getCell(0);
46                     HSSFCell cell1 = hssfRow.getCell(1);
47                     HSSFCell cell2 = hssfRow.getCell(2);
48                     HSSFCell cell3 = hssfRow.getCell(3);
49                     HSSFCell cell4 = hssfRow.getCell(5);
50                     int month=Integer.valueOf(time.split("/")[1]);
51                     int day=Integer.valueOf(time.split("/")[2])-t;
52                     if(day<=0)
53                     {
54                         month--;
55                         day+=28;
56                     }
57                     String time_m="";
58                     String time_d="";
59                     time_m=String.valueOf(month);
60                     time_d=String.valueOf(day);
61                     cell.setCellValue(time_m+"月"+time_d+"日");
62                     String m=String.valueOf(month);String d=String.valueOf(day);
63                     if(m.length()==1) m="0"+m;if(d.length()==1) d="0"+d;
64                     String Temp=time.split("/")[0]+"/"+m+"/"+d;
65                     Cursor q = RsqliteDatabase.rawQuery("select * from tempera where num='" + lastnum + "' and time1='" + Temp + "' order by time desc",null);
66                     q.moveToFirst();
67                     if(q.getCount()!=0)
68                     {
69                         cell1.setCellValue(q.getString(q.getColumnIndex("temperature")).toString());
70                         cell2.setCellValue(gethealth(Float.parseFloat(q.getString(q.getColumnIndex("temperature")).toString())));
71                         cell3.setCellValue(q.getString(q.getColumnIndex("location")).toString());
72                         cell4.setCellValue(q.getString(q.getColumnIndex("info")).toString());
73                     }else{
74                         cell1.setCellValue("无记录");
75                         cell2.setCellValue("无记录");
76                         cell3.setCellValue("无记录");
77                         cell4.setCellValue("无记录");
78                     }
79                 }
80                 OutputStream fos = new FileOutputStream("data/data/com.example.seanfu/14天健康登记样表.xls");
81                 hssfWorkbook.write(fos);
82                 fos.flush();
83                 fos.close();
84                 Toast.makeText(getActivity(),"生成成功："+"\"data/data/com.example.seanfu/14天健康登记样表.xls",Toast.LENGTH_SHORT).show();
85             }
86         } catch (FileNotFoundException e) {
87             e.printStackTrace();
88         } catch (IOException e) {
89             e.printStackTrace();
90         }
91     }