简单的JdbcUtil 类

import java.sql.*;

/** JDBC工具类 */
public class JdbcUtil {
  /**
   * 获取数据库连接对象并返回
   *
   * @return Connection对象
   * @throws Exception
   */
  public static Connection getConn() throws Exception {
    // 1.注册驱动
    Class.forName("com.mysql.jdbc.Driver");
    // 2.获取连接
    Connection conn =
        DriverManager.getConnection(
            "jdbc:mysql://localhost:1054/jt_db?characterEncoding=utf8", "root", "123456");
    return conn;
  }

  /**
   * 释放JDBC程序中的资源
   *
   * @param conn 连接对象
   * @param stat 传输器对象
   * @param rs 结果集对象
   */
  public static void close(Connection conn, Statement stat, ResultSet rs) {
    if (rs != null) {
      try {
        rs.close();
      } catch (SQLException e) {
        e.printStackTrace();
      } finally {
        rs = null;
      }
    }
    if (stat != null) {
      try {
        stat.close();
      } catch (SQLException e) {
        e.printStackTrace();
      } finally {
        stat = null;
      }
    }
    if (conn != null) {
      try {
        conn.close();
      } catch (SQLException e) {
        e.printStackTrace();
      } finally {
        conn = null;
      }
    }
  }
}