对于JDBC数据库的初始化操作

 package com.bluesky.connection;

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

 public class connection {
         private static final String URL="jdbc:mysql://localhost/test";
         private static final String USER="root";
         private static final String PASSWORD="1234";
         private static Connection conn=null;
         static{

             try {
                 //1.加载驱动程序
                 Class.forName("com.mysql.jdbc.Driver");
                 //2.获取数据库连接
                 conn=DriverManager.getConnection(URL, USER, PASSWORD);
             } catch (ClassNotFoundException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         public static Connection getConnnection(){
             return conn;
         }
 //        public static void main(String[] args) throws Exception {
 //
 //            //3.操作数据库
 //            Statement stmt=conn.createStatement();
 //            ResultSet rs=stmt.executeQuery("Select * from user");
 //            while (rs.next()) {
 //                System.out.println(rs.getString("id")+rs.getString("password"));
 //            }
 //        }
 }