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How to export data from database to CSV file |
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Example below exports data from MySQL Select query to CSV file.
testtable structure
CREATE TABLE testtable
(id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
text varchar(45) NOT NULL,
price integer not null);
Application takes path of output file as an argument.
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class automateExport {
public static void main(String[] args) {
DBase db = new DBase();
Connection conn = db.connect(
"jdbc:mysql://localhost:3306/test","root","caspian");
if (args.length != 1) {
System.out.println(
"Usage: java automateExport [outputfile path] ");
return;
}
db.exportData(conn,args[0]);
}
}
class DBase {
public DBase() {
}
public Connection connect(String db_connect_str,
String db_userid, String db_password) {
Connection conn;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection(db_connect_str,
db_userid, db_password);
} catch(Exception e) {
e.printStackTrace();
conn = null;
}
return conn;
}
public void exportData(Connection conn,String filename) {
Statement stmt;
String query;
try {
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_UPDATABLE);
//For comma separated file
query = "SELECT id,text,price into OUTFILE '"+filename+
"' FIELDS TERMINATED BY ',' FROM testtable t";
stmt.executeQuery(query);
} catch(Exception e) {
e.printStackTrace();
stmt = null;
}
}
};
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