java.sql.SQLSyntaxErrorException: Unknown database 'warehouse&servertimezone=gmt' 报错

一开始没加&servertimezone=gmt报错如下
在加上去之后就变成如下这样

<%@ page contentType="text/html;charset=gb2312" %>
<%@ page import="java.sql.*" %>
<HTML><body bgcolor=#EEDDFF>
 <% Connection con;
    Statement sql; 
    ResultSet rs;
    try{  Class.forName("com.mysql.cj.jdbc.Driver");
    }
    catch(Exception e){
       out.println("忘记把MySQL数据库的JDBC-数据库驱动程序复制到JDK的扩展目录中");
    }
    try { String uri= "jdbc:mysql://127.0.0.1/warehouse&servertimezone=gmt";
          String user="root";
          String password="root";
          con=DriverManager.getConnection(uri,user,password);
          //也可以写成con=DriverManager.getConnection(uri+"?user=root&password=");
          sql=con.createStatement();
          rs=sql.executeQuery("SELECT * FROM product ");
          out.print("<table border=2>");
          out.print("<tr>");
            out.print("<th width=100>"+"产品号");
            out.print("<th width=100>"+"名称");
            out.print("<th width=50>"+"生产日期");
            out.print("<th width=50>"+"价格");
          out.print("</TR>");
          while(rs.next()){
            out.print("<tr>");
              out.print("<td >"+rs.getString(1)+"</td>"); 
              out.print("<td >"+rs.getString(2)+"</td>");
              out.print("<td >"+rs.getDate("madeTime")+"</td>"); 
              out.print("<td >"+rs.getFloat("price")+"</td>");
            out.print("</tr>") ; 
          }
          out.print("</table>");
          con.close();
    }
    catch(SQLException e){ 
          out.print(e);
    }
 %>
</body></HTML>

warehouse&servertimezone=gmt改成warehouse?servertimezone=gmt+8，后面的参数连接第一个是?号啊，在后面的才是&

改为servertimezone=GMT%2B8 就是“GMT+8”试试看

jdbc:mysql://127.0.0.1/warehouse&servertimezone=gmt 把&改为?