jdbc连接myslq和sql两种数据库代码

利用jdbc连接mysql数据库

package com.nicolashe.util;

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

public class DbUtil {
	private String dbUrl="jdbc:mysql://localhost:3306/db_book";
	private String dbUserName="root";
	private String dbPassword="root";
	private String jdbcName="com.mysql.jdbc.Driver";
	public Connection getCon() throws Exception
	{
		Class.forName(jdbcName);
		Connection con=DriverManager.getConnection(dbUrl, dbUserName, dbPassword);
		return con;
		
	}
	public void closeCon(Connection con) throws Exception
	{
		if(con!=null){
			con.close();
		}
		
	}
	public static void main(String[] args )
	{
		
		DbUtil dbUtil=new DbUtil();
		try {
			dbUtil.getCon();
			System.out.println("数据库连接成功");
		} catch (Exception e) {
			// TODO Auto-generated catch block
			
			e.printStackTrace();
		}
	}
}

连接微软的sql数据库：

package com.nicolashe.util;
import java.sql.*;
	public class Main {   
  
    private String url="jdbc:sqlserver://localhost:1433;databaseName=test";   
    private String userName="hyx";   
    private String password="hyx";   
    private Connection con;   
    public Main(){   
	        try {   
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");   
            con=DriverManager.getConnection(url,userName,password);   
        } catch (ClassNotFoundException ex) {   
            System.out.println("Error:Can't Load the SQL Server Driver");   
            //Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);   
        }catch(SQLException ex){   
            System.out.println("Error:Can't connect to Database!");            //  Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);   
       }   
  
    }   
    public static void main(String[] args) {          Main main=new Main();   
       String sql="select * from users";   
       if(main.con==null)   
           return;   
	       try{   
           Statement st=main.con.createStatement();   
           ResultSet rs=st.executeQuery(sql);   
          while(rs.next()){   
              System.out.println(rs.getString(1)+","+rs.getString(2)+","+rs.getString(3)+","+rs.getString(4));   
          }   
       }catch(SQLException e){   
           e.printStackTrace();   
       }   
  }   
  
}