- import java.sql.Connection;
- import java.sql.DriverManager;
- import java.sql.ResultSet;
- import java.sql.SQLException;
- import java.sql.Statement;
- public final class JdbcUtils {
- private static String url = "jdbc:mysql://localhost:3306/jdbc";
- private static String user = "root";
- private static String password = "";
- private JdbcUtils() {
- }
- static {
- try {
- Class.forName("com.mysql.jdbc.Driver");
- } catch (ClassNotFoundException e) {
- throw new ExceptionInInitializerError(e);
- }
- }
- public static Connection getConnection() throws SQLException {
- return DriverManager.getConnection(url, user, password);
- }
- public static void free(ResultSet rs, Statement st, Connection conn) {
- 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 (conn != null)
- try {
- conn.close();
- } catch (SQLException e) {
- e.printStackTrace();
- }
- }
- }
- }
- }
JDBC獲取連接、關閉連接的簡單工具類
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