java连接mysql一般步骤

1.首先在电脑上安装mysql
2.然后在开发项目中导入相应的jar包
3.然后在代码中调用相应类进行调用。

例子：
事先在mysql中创建了名为jdbc的数据库
建立了叫user的表：

mysql> create database jdbc;
Query OK, 1 row affected (0.05 sec)

mysql> use jdbc
Database changed
mysql> create table users(
    -> id int primary key auto_increment,
    -> name varchar(40),
    -> password varchar(40),
    -> email varchar(60),
    -> birthday date)character set utf8 collate utf8_general_ci;
Query OK, 0 rows affected, 1 warning (0.11 sec)
mysql> insert into users(name,password,email,birthday)
    -> values('zs','123456','[email protected]','1980-12-03');
Query OK, 1 row affected (0.09 sec)
mysql> select * from users;
+----+------+----------+-------------+------------+
| id | name | password | email       | birthday   |
+----+------+----------+-------------+------------+
|  1 | zs   | 123456   | zs@sina.com | 1980-12-03 |
+----+------+----------+-------------+------------+

然后eclipse中web连接mysql：
首先，将jar包复制到WebContent中，然后右键包选择build path然后add to build path.
然后写入下列代码：

package cn.itcast.jdbc.example;

import java.sql.*;
public class Example01 {
	
public static void main(String[] args) throws SQLException{
	Statement stmt=null;
	ResultSet rs=null;
	Connection conn=null;
	try{
		Class.forName("com.mysql.cj.jdbc.Driver");
		String url="jdbc:mysql://localhost:3306/jdbc?&useSSL=false&serverTimezone=UTC";
		String username="root";
		String password="root";
		conn = DriverManager.getConnection(url,username,password);
		stmt= conn.createStatement();
		String sql = "select * from users";
		rs = stmt.executeQuery(sql);
		System.out.println("id|name|password|email|birthday");
		
		while(rs.next())
		{
			int id = rs.getInt("id");
			String name = rs.getString("name");
			String psw = rs.getString("password");
			String email = rs.getString("email");
			Date birthday = rs.getDate("birthday");
			System.out.println(id +" | "+name+" | "+psw+" | "+email+" | "+birthday);
			
		}
	}catch(ClassNotFoundException e)
	{
		e.printStackTrace();
	}
	finally{
		if(rs!=null){
			try{
				rs.close();
			}catch(SQLException e){
				e.printStackTrace();
			}
			rs=null;
		}
		
		if(stmt!=null){
			try{
				stmt.close();
			}
			catch(SQLException e)
			{
				e.printStackTrace();
			}stmt=null;
			
		}if(conn!=null){try{
			conn.close();
		}catch(SQLException e)
		{
			e.printStackTrace();
		}
		conn=null;
			
	}
		
	}
}

}

运行之，成功访问。