如何将 CSV 从 phone 存储导入到 SQLite？

Question

我有一种方法可以将 CSV 文件从文件夹“assets”导入到 SQLite table。

CSV 包含很多这样的行：France;Paris

但我不想从“assets”文件夹中获取 CSV 文件，我想修改该方法以从 phone 存储文件夹中导入 CSV 文件(/storage/emulated/0)但我不知道我必须改变什么才能实现它。有人可以帮帮我吗？提前致谢。

这是我要修改的方法：

public void importPlayersTable(Context context){

        SQLiteDatabase db = this.getWritableDatabase();

        AssetManager manager = context.getAssets();
        InputStream inStream = null;
        try {
            inStream = manager.open("playersTable.csv");
        } catch (IOException e) {
            e.printStackTrace();
        }

        BufferedReader buffer = new BufferedReader(new InputStreamReader(inStream));
        String line = "";
        db.beginTransaction();
        try {
            while ((line = buffer.readLine()) != null) {
                String[] colums = line.split(";");

                ContentValues cv = new ContentValues();
                cv.put("QUE_QUE", colums[0].trim());
                cv.put("ANS_QUE", colums[1].trim());

                db.insert(MI_TABLA_PLAYERS, null, cv);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        db.setTransactionSuccessful();
        db.endTransaction();
    }

Answer 1

您可以使用 FileReader 导入 .csv 文件，然后将其保存到 SQLite。检查此方法。

private void csvToSQLite(String filePath){
 FileInputStream fs = new FileInputStream(filePath);
 BufferedReader buffer = new BufferedReader(new InputStreamReader(fs));
 String line = "";
 String tableName ="TABLE_NAME";
 String columns = "_id, name, dt1, dt2, dt3";
 String str1 = "INSERT INTO " + tableName + " (" + columns + ") values(";
 String str2 = ");";

db.beginTransaction();
while ((line = buffer.readLine()) != null) {
    StringBuilder sb = new StringBuilder(str1);
    String[] str = line.split(",");
    sb.append("'" + str[0] + "',");
    sb.append(str[1] + "',");
    sb.append(str[2] + "',");
    sb.append(str[3] + "'");
    sb.append(str[4] + "'");
    sb.append(str2);
    db.execSQL(sb.toString());
  }
db.setTransactionSuccessful();
db.endTransaction();
}

Answer 2

我 post 我的解决方案基于 @SweetD3v 的回答，以防万一它对其他人有用。

public void importPlayersTable() throws FileNotFoundException {

        SQLiteDatabase db = this.getWritableDatabase();

        String filepath = "/sdcard/playersTable.csv";

        FileInputStream fs = new FileInputStream(filepath);

        BufferedReader buffer = new BufferedReader(new InputStreamReader(fs));
        String line = "";
        db.beginTransaction();
        try {
            while ((line = buffer.readLine()) != null) {
                String[] colums = line.split(",");

                ContentValues cv = new ContentValues();
                //cv.put("ID_PLAYER", colums[0].trim());
                cv.put("QUE_QUE", colums[1].trim());
                cv.put("ANS_QUE", colums[2].trim());

                db.insert(MI_TABLA_PLAYERS, null, cv);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        db.setTransactionSuccessful();
        db.endTransaction();
    }

我还必须在 class 中添加一个调用方法的 try-catch:

try {
                    d.importPlayersTable();
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                }

如何将 CSV 从 phone 存储导入到 SQLite？

How can I import CSV from phone storage to SQLite?

java

android

android-sqlite

android-studio