How to write the data from Mysql into a file using jdbc code and file writer? - jdbc

Question

String selectTableSQL = "select JobID, MetadataJson from raasjobs join metadata using (JobID) where JobCreatedDate > '2014-07-01';";
File file = new File("/users/t_shetd/file.txt");
try {
dbConnection = getDBConnection();
statement = dbConnection.createStatement();
System.out.println(selectTableSQL);
// execute select SQL stetement
ResultSet rs = statement.executeQuery(selectTableSQL);
if (!file.exists()) {
file.createNewFile();
}
FileWriter fw = new FileWriter(file.getAbsoluteFile());
BufferedWriter bw = new BufferedWriter(fw);
while (rs.next()) {
String JobID = rs.getString("JobID");
String Metadata = rs.getString("MetadataJson");
bw.write(selectTableSQL);
bw.close();
System.out.println("Done");
// Now i am only getting the output done

Answer 1

If I understand your question, then this
while (rs.next()) {
String JobID = rs.getString("JobID");
String Metadata = rs.getString("MetadataJson");
bw.write(selectTableSQL);
bw.close();
System.out.println("Done");
}
Should be something like (following Java capitalization conventions),
while (rs.next()) {
String jobId = rs.getString("JobID");
String metaData = rs.getString("MetadataJson");
bw.write(String.format("Job ID: %s, MetaData: %s", jobId, metaData));
}
bw.close(); // <-- finish writing first!
System.out.println("Done");
In your version, you close the output after printing the first line from the ResultSet. After that, nothing else will write (because the File is closed).