package Util; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException;import java.sql.Statement; public class sql { public static void main(String[] args) { //声明Connection对象 Connection con; //驱动程序名 String driver = "com.mysql.jdbc.Driver"; //URL指向要访问的数据库名mydata String url = "jdbc:mysql://localhost:3306/test"; //MySQL配置时的用户名 String user = "root"; //MySQL配置时的密码 String password = "123456"; //遍历查询结果集 try { //加载驱动程序 Class.forName(driver); System.out.println("1"); //1.getConnection()方法,连接MySQL数据库!! con = DriverManager.getConnection(url,user,password); System.out.println("2"); if(!con.isClosed()) System.out.println("Succeeded connecting to the Database!"); //2.创建statement类对象,用来执行SQL语句!! Statement statement = con.createStatement(); //要执行的SQL语句 String sql = "select name , day from aaa"; //3.ResultSet类,用来存放获取的结果集!! ResultSet rs = statement.executeQuery(sql); System.out.println("-----------------"); System.out.println("执行结果如下所示:"); System.out.println("-----------------"); System.out.println("姓名" + "\t" + "职称"); System.out.println("-----------------"); System.out.println("数据库数据成功获取!!"); String job = null; String id = null; while(rs.next()){ //获取stuname这列数据 job = rs.getString("name"); //获取stuid这列数据 id = rs.getString("day"); //输出结果 System.out.println(id + "\t" + job); } rs.close(); con.close(); } catch(ClassNotFoundException e) { //数据库驱动类异常处理 System.out.println("Sorry,can`t find the Driver!"); e.printStackTrace(); } catch(SQLException e) { //数据库连接失败异常处理 e.printStackTrace(); }catch (Exception e) { // TODO: handle exception e.printStackTrace(); }finally{ System.out.println("数据库数据成功获取!!"); } } }
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