Android将SQLite数据表导出到csv格式文件

通过FileWriter和BufferedWriter将SQLite数据表导出到csv格式文件的简单方法如下：

[java] view
plaincopy

public void ExportToCSV(Cursor c, String fileName) {



int rowCount = 0;

int colCount = 0;

FileWriter fw;

BufferedWriter bfw;

File sdCardDir = Environment.getExternalStorageDirectory();

File saveFile = new File(sdCardDir, fileName);

try {



rowCount = c.getCount();

colCount = c.getColumnCount();

fw = new FileWriter(saveFile);

bfw = new BufferedWriter(fw);

if (rowCount > 0) {

c.moveToFirst();

// 写入表头

for (int i = 0; i < colCount; i++) {

if (i != colCount - 1)

bfw.write(c.getColumnName(i) + ',');

else

bfw.write(c.getColumnName(i));

}

// 写好表头后换行

bfw.newLine();

// 写入数据

for (int i = 0; i < rowCount; i++) {

c.moveToPosition(i);

// Toast.makeText(mContext, "正在导出第"+(i+1)+"条",

// Toast.LENGTH_SHORT).show();

Log.v("导出数据", "正在导出第" + (i + 1) + "条");

for (int j = 0; j < colCount; j++) {

if (j != colCount - 1)

bfw.write(c.getString(j) + ',');

else

bfw.write(c.getString(j));

}

// 写好每条记录后换行

bfw.newLine();

}

}

// 将缓存数据写入文件

bfw.flush();

// 释放缓存

bfw.close();

// Toast.makeText(mContext, "导出完毕！", Toast.LENGTH_SHORT).show();

Log.v("导出数据", "导出完毕！");

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} finally {

c.close();

}

}

调用方法：

[java] view
plaincopy

Cursor c = helper.rawQuery("select * from test", null);

ExportToCSV(c, "test.csv");