Selenium | Mass CSV file generation by fetching data from database

In a project we are working on there are large number of pdf files for which field mapping data is stored in the database. In this project pdf forms are auto filled with data from Salesforce. Which PDF form field is mapped to which corresponding Salesforce object or field is the mapping information, which is stored in a MySQL database. We needed to retrieve this mapping information and store in CSV files (one CSV per form). This is the output we expect:

This is the pseudo code:

public static void main(String[] args) throws Exception 
{
// Iterate over each form
for each ($formid)
{
  //get mapping data from database
  query = “select * from form_field_mapping where form_id=$formid”;
		
  //AFieldMapping is a custom class in which single row of form field mapping info is stored
  List mappingInfo = obj.getData(query);
  //now store this data in a csv file
  obj.writeCsv(mappingInfo);
  writer.close();
}//end for loop

public List getData(String query) throws Exception
{
List mappingInfo = new ArrayList();
//connect to database
String dbUrl= "jdbc:mysql://localhost/accord_mapping_db";
String dbUsername= "root";
String dbPassword= "123456";
Class.forName("com.mysql.jdbc.Driver");
Connection con = DriverManager.getConnection(dbUrl, dbUsername, dbPassword);
//create statement object
Statement stmt = con.createStatement();

//send sql query to database
ResultSet rs = stmt.executeQuery(query);
// iterate ResultSet
while(rs.next()){
//create new object of AFieldMapping by using data in the db record and add to mappingInfo
}
}
public void writeCsv(List mappingInfo) throws Exception
{
String csv = "/home/home/Desktop/result/"+form_number+".csv";
CSVWriter writer = new CSVWriter(new FileWriter(csv));

//iterate over mappingInfo and write the objects in csv          
}

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