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SQLtoCSV_Java.java
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SQLtoCSV_Java.java
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import java.sql.* ;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
public class SQLtoCSV_Java {
public static void main(String[] args) {
String CSV_QUOTE = "\"";
String COMMA_DELIMITER = ",";
String NEW_LINE_SEPARATOR = "\n";
try {
String currentDir = new File("").getAbsolutePath();
String database = currentDir + "/CLData.db";
// CONNECT TO DATABASE
Connection conn = DriverManager.getConnection("jdbc:sqlite:"+database);
conn.setAutoCommit(false);
// QUERY DATABASE
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM cldata");
ResultSetMetaData rsmd = rs.getMetaData();
int rs_column_count = rsmd.getColumnCount();
// WRITE CSV
FileWriter writer = new FileWriter(currentDir + "/CLData_Java.csv");
// HEADERS
for(int i=1; i <= rs_column_count; i++) {
writer.append(rsmd.getColumnName(i));
if(i < rs_column_count) {
writer.append(COMMA_DELIMITER);
}
}
writer.append(NEW_LINE_SEPARATOR);
// DATA ROWS
while (rs.next()) {
for(int i=1; i <= rs_column_count; i++) {
writer.append(CSV_QUOTE + rs.getString(i).replace(CSV_QUOTE, "\"\"") + CSV_QUOTE);
if(i < rs_column_count) {
writer.append(COMMA_DELIMITER);
}
}
writer.append(NEW_LINE_SEPARATOR);
}
rs.close();
stmt.close();
conn.close();
writer.flush();
writer.close();
System.out.println("Successfully migrated SQL data to CSV!");
} catch (SQLException err) {
System.out.println(err.getMessage());
} catch (IOException ioe) {
System.err.println(ioe.getMessage());
}
}
}