mysql 字符集 Java

String driver = "com.mysql.jdbc.Driver";
        String url = "jdbc:mysql://localhost:3306/alex_accountManage1";
         String user = "root";
         String password = "123456";
         try {
             Class.forName(driver);
             Connection conn = DriverManager.getConnection(url, user, password);
             Statement stmt = conn.createStatement();
           // stmt.executeUpdate("insert into messages (message) values ('测试MySQL编码')");
            ResultSet rs = stmt.executeQuery("select * from account");
            while (rs.next()) {
                int id = rs.getInt("id");
               String message = rs.getString("MaterialName");
                System.out.println(id + " " + message);
            }
             rs.close();
             stmt.close();
             conn.close();
        } catch (Exception e) {
            e.printStackTrace();
        }