import java.io.File;
import java.io.FileWriter;
import java.io.Reader;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
public class Main {
private static String url = "jdbc:oracle:thin:@localhost:1521:javaDemo";
private static String username = "java";
private static String password = "welcome";
public static void main(String[] args) throws Exception {
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection(url, username, password);
PreparedStatement stmt = conn.prepareStatement("SELECT name, description, data FROM documents ");
ResultSet resultSet = stmt.executeQuery();
while (resultSet.next()) {
String name = resultSet.getString(1);
String description = resultSet.getString(2);
File data = new File("C:\\a.txt");
Reader reader = resultSet.getCharacterStream(3);
FileWriter writer = new FileWriter(data);
char[] buffer = new char[1];
while (reader.read(buffer) > 0) {
writer.write(buffer);
}
writer.close();
}
conn.close();
}
}