- 加载并注册JDBC驱动
- 创建数据库连接
- 创建Statement对象
- 遍历查询结果
- 关闭连接,释放资源
1 public class StandardJDBCSanple { 2 public static void main(String[] args) { 3 //1.加载并注册JDBC驱动 4 Connection conn =null; 5 try{ 6 Class .forName("com.mysql.cj.jdbc.Driver"); 7 //2.创建数据库连接 8 conn = DriverManager.getConnection( 9 url:"" 10 user:"root",password:"root" 11 12 //3.创建Statement对象 13 Statement stmt = conn.createStatement(); 14 ResultSet rs = stmt.executeQuery(sql:"select *from" employee"); 15 //4.遍历查询结果 16 while(rs.next()){ 17 Integer eno=rs.getInt(columnlndex:1);//eno 18 String ename = rs.getString(columnLabel:"ename"); 19 Float salary = rs.getFloat(columnLabel:"salary"); 20 String dname = rs.getString(columnLabel:dname"); 21 System.out.println(dname + "-" + "-" + ename + "-" +salary); 22 23 } 24 }catch(Exception e){ 25 e.printStacKTrace(); 26 }finally { 27 try { 28 if(conn ! = null && conn.isClosed() == false){ 29 //5.关闭连接,释放资源 30 conn.close(); 31 } 32 }catch(Exception ex){ 33 ex.pritnStackTrace(); 34