JAVA连接ORACLE数据库的步骤

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class TestJDBC {

	public static void main(String[] args) {
		Connection conn = null;
		ResultSet rs = null;
		Statement state = null;
		try {
			Class.forName("oracle.jdbc.OracleDriver");
			conn = DriverManager.getConnection("jdbc:oracle:" +
					"thin:@127.0.0.1:1521:ORCL","scott","tiger");
			state = conn.createStatement();			
			rs = state.executeQuery("select * from dept");
			while(rs.next()){
				String s = rs.getString("dname");
				System.out.println(s.toLowerCase());
			}
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			try {
				if(rs != null)
					rs.close();
				if(state != null)
					state.close();
				if(conn != null)
					conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
			
		}
		
		
	}
	
}