连接数据库

连接数据库

package com;

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

public class ConnetionHelper {
    private  static  final  String URL="jdbc:sqlserver://localhost\SQLEXPRESS:1433;databaseName=Emp";
    private static final String USER="sa";
    private static final String PWD="";
    private static final String DRIVER="com.microsoft.sqlserver.jdbc.SQLServerDriver";

    static {
        try {
            Class.forName(DRIVER);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
            throw new RuntimeException("驱动加载失败",e);
        }
    }

    public static Connection getConnection(){
        Connection conn = null;
        try {
            conn = DriverManager.getConnection(URL,USER,PWD);
        } catch (SQLException e) {
            e.printStackTrace();
            throw new RuntimeException("创建连接失败",e);
        }
        return conn;
    }

    public static void main(String[] args) {
        Connection conn = getConnection();
        System.out.println(conn);
    }
}