Data source rejected establishment of connection, message from server: "Too many connections"解决办法

//数据源拒绝从服务器建立连接、消息：“连接太多”
com.MySQL.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: "Too many connections"

try{            
        conn=Good.getConnection();
        stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
        String sql1="insert into cat_garbage values(‘"+rs.getInt("id")+"‘,‘"+rs.getInt("cid")+"‘,‘"+rs.getString("name")+"‘,‘"+rs.getString("keyword")+"‘)";
        stmt.executeUpdate(sql1);
        }
        catch(SQLException|ClassNotFoundException|IOException e)
        {
            e.printStackTrace();
        }
        finally
        {
            if(stmt!= null) 
                stmt.close();         
            if(conn!= null) 
                conn.close(); 
        }
   }