JDBC util 工具类

 

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


public final class JdbcUtil {
	private static String url = "jdbc:oracle:thin:@192.168.1.102:1521:orcl";
	private static String password = "cj";
	private static String user = "cj";

	private JdbcUtil() {
	}

	static {
		try {
			Class.forName("oracle.jdbc.driver.OracleDriver");
		} catch (ClassNotFoundException e) {
			throw new ExceptionInInitializerError(e);
		}
	}



	public static Connection getConnection() throws SQLException {
		return DriverManager.getConnection(url, "cj", "cj");
	}

	public static void free(ResultSet rs, Statement st, Connection con) {
		try {
			if (rs != null)
				rs.close();
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			try {
				if (st != null)
					st.close();
			} catch (SQLException e) {
				e.printStackTrace();
			} finally {
				if (con != null)
					try {
						con.close();
					} catch (SQLException e) {
						e.printStackTrace();
					}
			}
		}
	}

}