1.在index的表单中转向newCustomer.jsp

     
    
      
             
        
                 
Name:
                 
              
              
                 
Address:
                 
              
              
                 
Phone:
                 
              
              
                 
                 
Create New Customer
              
           
      
  
     

　　2.newCustomer.jsp中进行

<%@ page import="MVCCases.Customer" %><%@ page import="java.util.List" %><%--  Created by IntelliJ IDEA.  User: Skye  Date: 2017/12/11  Time: 9:46  To change this template use File | Settings | File Templates.--%><%@ page contentType="text/html;charset=UTF-8" language="java" %>    <%    Object message = request.getAttribute("message");    if(message!= null){        %>        
        <%=message%>        
        
        
<%    }%>
     
      
                 <%--colspan="2"用来指定单元格横向跨越的列数  横跨两列--%>        <%--rowspan的作用是指定单元格纵向跨越的行数--%>        
           
        
                 
CustomerName:
                 
"/>
            
            
                 
Address
                 
"/>
            
            
                 
Phone
                 
"
            
            
         
            
       
      
     

　　3.CustomerServlet中进行add()方法的编写

注意区分有无重复姓名，若有则进行转发，若么有，则进行重定向

private void add(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {        //1.获取添加的顾客的信息        String name = req.getParameter("name");        String address = req.getParameter("address");        String phone = req.getParameter("phone");        long count = customerDAO.getCountWithName(name);        if(count > 0){            req.setAttribute("message", "用户名" + name + "已被占用");            req.getRequestDispatcher("/newCustomer.jsp").forward(req, resp);            return;        }        //2.创建一个Customer对象        Customer customer = new Customer(name, address, phone);        customerDAO.save(customer);        //若添加成功，则重定向到成功页面        resp.sendRedirect("success.jsp");    }

　　5.重定向的success.jsp

<%@ page import="MVCCases.Customer" %><%@ page import="java.util.List" %><%--  Created by IntelliJ IDEA.  User: Skye  Date: 2017/12/11  Time: 9:19  To change this template use File | Settings | File Templates.--%><%@ page contentType="text/html;charset=UTF-8" language="java" %>        
操作成功
    
return!