JDBC连接数据库

public class JdbcDemo1 {
    public static void main(String[] args) throws SQLException {
        //1.注册驱动
     //Class.forName("com.mysql.jdbc.Driver") 
     //上面的方式只会没有jar包会报运行时异常,下面的写法会在编译时报异常 DriverManager.registerDriver(new com.mysql.jdbc.Driver()); //2.获取连接 Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/spring", "root", "123456"); //3.获取操作数据库的预处理对象 PreparedStatement pstm = conn.prepareStatement("select * from account"); //4.执行sql ResultSet rs = pstm.executeQuery(); //5.处理结果集 while(rs.next()){ System.out.println(rs.getString("name")); } //6.关闭资源 rs.close(); pstm.close(); conn.close(); } }

 

posted @ 2019-06-18 10:28  findlisa  阅读(145)  评论(0编辑  收藏  举报