Eksport do CSV za pomocą Apache Commons CSV

PC23-BazyDanych_Maven/pom.xml

@@ -26,6 +26,11 @@
 			<version>3.41.2.1</version>
 			<scope>runtime</scope>
 		</dependency>
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-csv</artifactId>
+			<version>1.10.0</version>
+		</dependency>
 	</dependencies>
 
 </project>

PC23-BazyDanych_Maven/src/main/java/biblioteki/EksportCSV.java

+package biblioteki;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+import org.apache.commons.csv.CSVFormat;
+import org.apache.commons.csv.CSVPrinter;
+
+public class EksportCSV {
+
+	public static void main(String[] args) {
+		System.out.println("Zadaję zapytanie");
+
+		try(Connection c = DriverManager.getConnection("jdbc:postgresql://localhost/hr", "kurs", "abc123");
+				PreparedStatement stmt = c.prepareStatement("SELECT * FROM employees");
+				ResultSet rs = stmt.executeQuery()) {
+			
+			System.out.println("Zapisuję do pliku");
+			eksportujDoCSV(rs, "eksport.csv");
+			System.out.println("Gotowe");
+		} catch (SQLException | IOException e) {
+			e.printStackTrace();
+		}
+	}
+
+	static void eksportujDoCSV(ResultSet rs, String sciezka) throws SQLException, IOException {
+		CSVFormat format = CSVFormat.Builder.create()
+				.setDelimiter(';')
+				.setHeader(rs)
+				.build();
+		
+		try(PrintWriter out = new PrintWriter(sciezka);
+			CSVPrinter printer = new CSVPrinter(out, format)) {
+			printer.printRecords(rs);
+		}
+	}
+
+}