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();
}
}

}