import java.sql.*;

public class Test
{
    public static void main(String[] args) throws Exception
    {
        Class.forName("com.mysql.jdbc.Driver");
        
        //一开始必须填一个已经存在的数据库
        String url = "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8";    
        Connection conn = DriverManager.getConnection(url, "root", "123456");
        Statement stat = conn.createStatement();
        
        //创建数据库hello
        stat.executeUpdate("create database hello");
        
        //打开创建的数据库
        stat.close();
        conn.close();
        url = "jdbc:mysql://localhost:3306/hello?useUnicode=true&characterEncoding=utf-8";
        conn = DriverManager.getConnection(url, "root", "123456");
        stat = conn.createStatement();
        
        //创建表test
        stat.executeUpdate("create table test(id int, name varchar(80))");
        
        //添加数据
        stat.executeUpdate("insert into test values(1, '张三')");
        stat.executeUpdate("insert into test values(2, '李四')");
        
        //查询数据
        ResultSet result = stat.executeQuery("select * from test");
        while (result.next())
        {
            System.out.println(result.getInt("id") + " " + result.getString("name"));
        }
        
        //关闭数据库
        result.close();
        stat.close();
        conn.close();
    }
}

------解决方案--------------------
创建数据库和数据库中表的sql会写不？

只要会写sql就行，java也只是调用这些创建的sql而已。。。

------解决方案--------------------
Java code

    public static void execute(String sql){
        Connection conn = null;
        Statement st = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection("jdbc:mysql://localhost/test", "root", "root");
            st = conn.createStatement();
            st.execute(sql);
        } catch(ClassNotFoundException e){
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally{
            try {
                if(conn!=null)conn.close();
                if(st!=null)st.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

------解决方案--------------------
非主流需求，实际中没人动态去创建数据库的！