import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class ConnDB {
static Connection conn = null;
static Statement sm = null;
static ResultSet rs = null;
public static Connection getConn() {
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
conn = DriverManager.getConnection(
"jdbc:oracle:thin:@localhost:1521:orcl", "scott", "hello");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return conn;
}
public static void close() {
try {
if (rs != null) {
rs.close();
}
if (sm != null) {
sm.close();
}
if (conn != null) {
conn.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
class OracleDB {
public static void main(String[] args) {
Connection conn = null;
Statement sm = null;
ResultSet rs = null;
try {
conn = ConnDB.getConn();
sm = conn.createStatement();
rs = sm.executeQuery("select * from dept");
while (rs.next()) {
System.out.println("deptno==" + rs.getInt(1));
System.out.println("dname==" + rs.getString(2));
System.out.println("loc==" + rs.getString(3));
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
ConnDB.close();
}
}
}