本文实例为大家分享了JDBC建立数据库连接的具体代码，供大家参考，具体内容如下
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import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException; import com.mysql.jdbc.Connection;import com.mysql.jdbc.PreparedStatement; public class Test { public static void main(String[] args) { //声明Connection对象 Connection conn = null; PreparedStatement preparedStatement = null; ResultSet resultSet = null; //驱动程序名 String driver = "com.mysql.jdbc.Driver"; //用户名 String user = "root"; //密码 String password = "1234"; //url String url = "jdbc:mysql://localhost:3306/db_person"; try { String sql = "SELECT * FROM student"; //1.加载驱动 Class.forName(driver); //2.获得connect连接 conn = (Connection) DriverManager.getConnection(url, user, password); //3.获得PreparedStatement preparedStatement = (PreparedStatement) conn.prepareStatement(sql); //4.获得结果集 resultSet = preparedStatement.executeQuery(); while(resultSet.next()) { int id = resultSet.getInt(1); String name = resultSet.getString(2); String sex = resultSet.getString(3); int age = resultSet.getInt(4); System.out.println(id +" "+ name + " " + sex + " " + age); } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); }finally { if(resultSet != null) { try { resultSet.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } if(preparedStatement != null) { try { preparedStatement.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } if(conn != null) { try { conn.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.cnblogs.com/SkyeAngel/p/7864823.html
