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2011-03-02T05:02:20.917
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finally, i proceeded like this as you adviced. I only put the parts of the code which i think is more related to the question :) ` <pre><code>private final String createTableString = "" + "CREATE TABLE IF NOT EXISTS " + _tableName + " (" + "id INT UNSIGNED NOT NULL AUTO_INCREMENT, " + "country VARCHAR(3) NOT NULL, " + "city VARCHAR(40) NOT NULL, " + "region VARCHAR (5) NOT NULL, " + "population FLOAT NOT NULL, " + "latitude FLOAT NOT NULL, " + "longitude FLOAT NOT NULL, " + "PRIMARY KEY(id)" + " );"; private final String insertString = "" + "INSERT INTO " + _tableName + " (country, city, region, population, latitude, longitude) " + "VALUES (?,?,?,?,?,?)" + ";"; public void go() throws IOException, SQLException { loadDriver(); Connection conn = null; Properties connectionProps = new Properties(); connectionProps.put("user", ""); connectionProps.put("password", ""); String connectionURL = _protocol + _subprotocol + _dbName + _dbSettings; ResultSet rs = null; try { conn = DriverManager.getConnection(connectionURL, connectionProps); logger.info("Connected to {} database.", _dbName); conn.setAutoCommit(false); Savepoint savept1 = conn.setSavepoint(); Statement stmt = conn.createStatement(); try { stmt.execute(createTableString); logger.info("The table '{}' created successfully", _tableName); } catch (SQLException sqle) { logger.error("Error while creating the table '{}'", _tableName); printSQLException(sqle); } PreparedStatement pstmt = conn.prepareStatement(insertString); _allStatements.add(pstmt); /* rs: pstmt: * 1 -> COUNTRY * 2 -> CITY 1 -> COUNTRY * 3 -> ACCENTCITY 2 -> CITY * 4 -> REGION 3 -> REGION * 5 -> POPULATION 4 -> POPULATION * 6 -> LATITUDE 5 -> LATITUDE * 7 -> LONGITUDE 6 -> LONGITUDE */ rs = Csv.getInstance().read(_csvFileName, null, _csvCharset); int rowCount = 0; while (rs.next()) { if (rs.getFloat(5) != 0) { // If population is not null. pstmt.setString(1, rs.getString(1)); // country pstmt.setString(2, rs.getString(3)); // city (accentcity in reality) pstmt.setString(3, rs.getString(4)); // region pstmt.setFloat(4, rs.getFloat(5)); // population pstmt.setFloat(5, rs.getFloat(6)); // latitude pstmt.setFloat(6, rs.getFloat(7)); // longitude pstmt.addBatch(); rowCount ++; } } int[] rowsUpdated = pstmt.executeBatch(); for (int i=0; i<rowsUpdated.length; i++) { if (rowsUpdated[i] == -2) { logger.error("Execution {}: unknown number of rows inserted.", i); logger.error("Rolling back ..."); conn.rollback(savept1); } else { logger.trace("Successful: execution {}, {} rows updated !", i, rowsUpdated[i]); } } conn.commit(); } finally { // release all open resources to avoid unnecessary memory usage. </code></pre> ....` Thanks!
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1. POHow to create a h2 database from some fields of a CSV file
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1. CO@Thomas Mueller's example is more succinct. A similar approach can be used with [INSERT](http://h2database.com/html/grammar.html#insert), too.
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