Java实现JDBC连接数据库实例

 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;

 public class JDBCTest {

     private static final String URL="jdbc:mysql://127.0.0.1:3306/student";
     private static final String USER="root";
     private static final String PASSWORD="root";

     public static void main(String[] args) throws ClassNotFoundException, SQLException {

         //1.加载驱动程序
         Class.forName("com.mysql.jdbc.Driver");

         //2.获得数据连接
         Connection conn = DriverManager.getConnection(URL, USER, PASSWORD);

         //3.使用数据库的连接创建声明
         Statement stmt = conn.createStatement();

         //4.使用声明执行SQL语句
         ResultSet rs = stmt.executeQuery("select * from stu");

         //5.读取数据库的信息
         while(rs.next()){
             String id = rs.getString("id");
             String name = rs.getString("name");
             String sex = rs.getString("sex");
             String score = rs.getString("score");
             System.out.println(id+"姓名："+name+"，性别："+sex+"，成绩："+score);
         }

     }

 }