如何使用SpringMVC在一个表中显示JSP页面上的两个表数据（子表和父表）
我正在从事一个基于网上购物web应用程序的项目。在这个项目中，我使用Hibernate4.3和SpringMVC3.1。我有两个表，一个是Order表（orderid、customerid、dateorderplace、description），另一个是Customers表（父表）。 我想根据订单表的外键（customerid）显示订单和客户名称的完整详细信息，我能够在jsp页面上只显示客户id而不显示客户名称 订单表：-如何使用SpringMVC在一个表中显示JSP页面上的两个表数据（子表和父表）,spring,hibernate,jsp,Spring,Hibernate,Jsp,我正在从事一个基于网上购物web应用程序的项目。在这个项目中，我使用Hibernate4.3和SpringMVC3.1。我有两个表，一个是Order表（orderid、customerid、dateorderplace、description），另一个是Customers表（父表）。 我想根据订单表的外键（customerid）显示订单和客户名称的完整详细信息，我能够在jsp页面上只显示客户id而不显示客户名称 订单表：- DROP TABLE IF EXISTS `pib`.`orders`;
DROP TABLE IF EXISTS `pib`.`orders`;
CREATE TABLE `pib`.`orders` (
`orderid` int(10) unsigned NOT NULL auto_increment,
`customerid` int(10) unsigned NOT NULL,
`dateorderplaced` datetime default NULL,
`orderdetails` varchar(200) NOT NULL,
PRIMARY KEY (`orderid`),
KEY `FK_orders_1` (`customerid`),
CONSTRAINT `FK_orders_1` FOREIGN KEY (`customerid`) REFERENCES `customers` (`customerid`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
DROP TABLE IF EXISTS `pib`.`customers`;
CREATE TABLE `pib`.`customers` (
`customerid` int(10) unsigned NOT NULL auto_increment,
`firstname` varchar(45) default NULL,
`lastname` varchar(45) default NULL,
`loginname` varchar(45) NOT NULL,
`loginpassword` varchar(45) NOT NULL,
`email` varchar(45) NOT NULL,
`mobile` varchar(13) default NULL,
`address` varchar(45) default NULL,
`city` varchar(45) default NULL,
`state` varchar(45) default NULL,
`pincode` varchar(45) default NULL,
`createddate` date default NULL,
`role` varchar(45) NOT NULL,
PRIMARY KEY (`customerid`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
public class Orders{
private Integer orderid;
private Customers customers;
private Date dateorderplaced;
private String orderdetails;
//setters n getters
}
@Controller
public class AdminOrderController {
OrdersDAO ordersDAO;
CustomersDAO customersDAO;
@RequestMapping(value = "/vieworders.htm")
public ModelAndView prepareOrderList(){
ModelAndView mav = new ModelAndView();
mav.addAllObjects(prepareOrderModel());
mav.setViewName("admin/vieworders");
return mav;
}
public class Customers implements java.io.Serializable {
private Integer customerid;
private String firstname;
private String lastname;
private String loginname;
private String loginpassword;
private String email;
private String mobile;
private String address;
private String city;
private String state;
private String pincode;
private Date createddate;
private String role;
// setters n getters
}
public class Orders{
private Integer orderid;
private Customers customers;
private Date dateorderplaced;
private String orderdetails;
//setters n getters
}
@Controller
public class AdminOrderController {
OrdersDAO ordersDAO;
CustomersDAO customersDAO;
@RequestMapping(value = "/vieworders.htm")
public ModelAndView prepareOrderList(){
ModelAndView mav = new ModelAndView();
mav.addAllObjects(prepareOrderModel());
mav.setViewName("admin/vieworders");
return mav;
}
public Map prepareOrderModel(){
Map map = new HashMap();
map.put("orderList", ordersDAO.findAll());
//map.put("customersList", customersDAO.findAll());
return map;
}
<table>
<tbody>
<% i=0; %>
<tr>
<th>#</th>
<th>Order ID</th>
<th>Customer</th>
<th>Date</th>
</tr>
<c:forEach items="${orderList}" var="ol">
<tr>
<td><%= ++i %></td>
<td>${ol.orderid}</td>
<td>${ol.customer}</td>
<!-- <td>${ol.firstname}</td>
<td>${ol.cutomers.firstname}</td> -->
<td>${ol.dateorderplaced}</td>
</tr>
</c:foreach> </table>
publicmap prepareOrderModel（）{
Map Map=newhashmap（）；
put（“orderList”，ordersDAO.findAll（））；
//put（“customersList”，customersDAO.findAll（））；
返回图；
}
#
订单号
顾客
日期
${ol.orderid}
${ol.customer}
${ol.dateorderplaced}
jspprepareOrderModel（）${ol.dateorderplacted}