JAVAEE框架技术之15SSM综合案例 订单管理查询
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day02_SSM综合案例
一、课程目标
1. 【掌握】订单管理查询
2. 查询所有订单信息
3. 理解关系--mybatis；一对多 一对一
4. 理解 订单详情
二、订单管理
2.1 查询所有订单
2.1 订单表关系结构图
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2.2 创建相应的实体类
//会员类
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Member
private int id;
private String name;
private String nickName;
private String phoneNum;
private String email;
//旅客类
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Traveller
private int id;
private String name;
private String sex;
private String phoneNum;
private int credentialsType;//'证件类型 0身份证 1护照 2军官证',
private String credentialsNum;// '证件号码',想到 正则表达式,要求会使用别人写好的
private int travellerType;//'旅客类型(人群) 0 成人 1 儿童',
//订单类
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Order
private int id;
private String orderNum;
@DateTimeFormat(pattern="yyyy-MM-dd HH:mm")
private Date orderTime;
private int peopleCount;
private String orderDesc;
private int payType;//'支付方式（0 支付宝 1微信 2 其他'
private int orderStatus;// '订单状态（0未支付1已支付）',
private int productId;// '产品id外键',
private int memberId;// '会员（联系人）id外键',
private String orderTimeStr; //在需要修改的成员变量后加Str
private Product product;
private List<Traveller> travellers;
//1.获取日期格式化信息;
public String getOrderTimeStr()
// 对日期格式化
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm");
if (null != orderTime)
orderTimeStr = dateFormat.format(orderTime);
return orderTimeStr;
public String getPayTypeStr()
String pageTypeStr; //将这个变量返回一下
switch (payType)
case 0:pageTypeStr="支付宝";break;
case 1:pageTypeStr="微信";break;
default:pageTypeStr="其他";break;
return pageTypeStr;
public String getOrderStatusStr() // 复习了三元运算符; 嵌套会吗？
return orderStatus==0? "未支付":"已支付";
编写OrderMapper
public interface OrderMapper
List<Order> findAll();
编写OrderService
public interface OrderService
List<Order> findAll();
实现类
@Service
public class OrderServiceImpl implements OrderService
@Autowired
private OrderMapper orderMapper;
@Override
public List<Order> findAll()
return orderMapper.findAll();
编写OrderController
@Controller
@RequestMapping("/order")
public class OrderController
@Autowired
private OrderService orderService;
/**
* 分页查询所有订单
* @param page
* @param limit
* @return
*/
@RequestMapping("/findAll")
public ModelAndView findAll(@RequestParam(name = "page",defaultValue = "1")int pageNum,
@RequestParam(name = "limit",defaultValue = "5")int pageSize)
//利用分页，赋值
Page page= PageHelper.startPage(pageNum,pageSize);
ModelAndView mv=new ModelAndView();
// 查询数据
List<Order> orderList = orderService.findAll();
PageInfo pageInfo=new PageInfo(orderList);
//为mv设置对象
mv.addObject("pageInfo",pageInfo);
mv.setViewName("order-list");
return mv;
编写OrderMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="cn.yh.mapper.OrderMapper">
<!--查询订单，查询订单对应的产品-->
<resultMap id="findAll_product" type="com.yh.pojo.Orders" autoMapping="true">
<association property="product" column="productId" select="com.yh.mapper.ProductMapper.selectById">
</association>
</resultMap>
<select id="selectAll" resultMap="findAll_product">
select * from orders
</select>
</mapper>
测试
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总结：这里建议使用findAll,注意和之前的Product的定义保持一致，再次来理解restful风格。
好处：前后端分离开发，风格统一；
/项目名/product/findAll
/项目名/order/findAll
/项目名/user/findAll
2.2 订单详情
查询订单详情流程
点击订单详情，查询当前订单关联信息在页面显示
2.1 5表关联查询
select *,o.id oid,p.id pid,t.id tid,t.`name` tname,t.phoneNum tnum
from orders o
left join product p on o.productId=p.id
left join member m on o.memberId=m.id
left join order_traveller ot on o.id=ot.orderId -- 这些继续和游客表建立关联;
left join traveller t on ot.travellerId=t.id
where o.id=1
2.2 Member实体类
//会员类 代码同上
Traveller实体类
//旅客类
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Traveller
private int id;
private String name;
private String sex;
private String phoneNum;
private int credentialsType;//'证件类型 0身份证 1护照 2军官证',
private String credentialsNum;// '证件号码',
private int travellerType;//'旅客类型(人群) 0 成人 1 儿童',
private String credentialsTypeStr;
private String travellerTypeStr;
public String getCredentialsTypeStr()
String typeStr="";
switch (credentialsType)
case 0:typeStr="身份证";break;
case 1:typeStr="护照";break;
case 2:typeStr="军官证";break;
return typeStr;
public String getTravellerTypeStr()
return travellerType==0?"成人":"儿童";
编写OrderMapper
public interface OrderMapper
//根据id查询订单详细信息
public Order findById(int id);
编写Orderervice
//2.根据id来查询订单;
public Order findById(Integer id);
实现类
public Order findById(Integer id)
return orderMapper.findById(id);
编写OrderController
@RequestMapping("/findById")
public String findById(HttpServletRequest request,int id)
Order order = ordersService.findById(id);
request.setAttribute("order",orders);
return "order-show";
编写OrderMapper.xml
方式一:
<!--*****************************resultMap:findByIdMap 定义********************-->
<resultMap id="findByIdMap" type="Order" autoMapping="true">
<!--订单表的id 主键-->
<id property="id" column="oid"/>
<!-- 映射到产品表 -->
<association property="product" autoMapping="true">
<id property="id" column="pid"/>
</association>
<!-- 映射到会员表 -->
<association property="member" autoMapping="true">
<id property="id" column="mid"/>
</association>
<!-- 映射到游客表,订单表和游客表的关系是啥？？? M:N 多对多的关系 -->
<collection property="travellers" ofType="Traveller" autoMapping="true">
<id property="id" column="tid"/>
<result property="name" column="tname"/>
<result property="phoneNum" column="tnum"/>
</collection>
</resultMap>
<!-- 3.findById这个方法的编写;由于是复杂数据类型，所以，返回类型是resultMap,不是resultType -->
<select id="findById" resultMap="findByIdMap">
select *,o.id oid,p.id pid,m.id mid,t.id tid,t.`name` tname,t.phoneNum tnum
from orders o
left join product p on o.productId=p.id
left join member m on o.memberId=m.id
left join order_traveller ot on o.id=ot.orderId -- 这些继续和游客表建立关联;
left join traveller t on ot.travellerId=t.id
where o.id=#id
</select>
方式二：
<resultMap id="o_p_m_t" type="com.yh.pojo.Orders" autoMapping="true">
<association property="product" column="productId" select="com.yh.mapper.ProductMapper.selectById"> </association>
<association property="member" column="memberId" select="com.yh.mapper.MemberMapper.selectById"></association>
<collection property="travellers" column="id" select="com.yh.mapper.TravellerMapper.selectByOid"></collection>
</resultMap>
<select id="selectById" resultMap="o_p_m_t">
select * from orders where id=#id
</select>
// 注意下面是三个ProductMapper MemberMapper TravellerMapper
//根据产品id查询产品信息
@Select("select * from product where id =#id")
public Product selectById(int id);
//根据会员id查询会员信息
@Select("select * from member where id=#id")
public List<Member> selectById(int id);
//根据订单id查询旅客信息
@Select("select t.* from traveller t,order_traveller ot where t.id=ot.travellerId and ot.orderId=#oid")
public List<Traveller> selectByOid(int oid);
测试
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2.3 多条件模糊查询
就是在查询所有数据的基础上添加查询条件
2.3.1 OrderMapper
@Param用于dao层，是mybatis中的注解
使得mapper.xml中的参数与后台的参数对应上，也增强了可读性
如果两者参数名一致得话，spring会自动进行封装，不一致的时候就需要手动去使其对应上。
即：用注解来简化xml配置的时候,@Param注解的作用是给参数命名,参数命名后就能根据名字得到参数值,正确的将参数传入sql语句中 。
复习mybatis的@Param技术点,向mapper.xml传值
public interface OrderMapper
//根据查询所有数据根据orderNum查询 productName模糊查询
public List<Order> selectAll(@Param("orderNum") String orderNum, @Param("productName") String productName);
2.3.2 OrderService
public interface OrderService
//根据查询所有数据根据orderNum查询 productName模糊查询
public List<Order> findAll(String orderNum, String productName);
@Service
public class OrderServiceImpl implements OrderService
@Autowired
private OrderMapper orderMapper;
/**
* 根据查询所有数据根据orderNum查询 productName模糊查询
* @param orderId
* @return
*/
@Override
public List<Order> findAll(String orderNum, String productName)
return orderMapper.selectAll(orderNum, productName);
旧OrderController（不写）
@Controller
@RequestMapping("/order")
public class OrderController
@Autowired
private OrderService orderService;
/**
* 根据查询所有数据根据orderNum查询 productName模糊查询
* @param page limit key value
* @return
*/
@RequestMapping("/findAll")
public String findAll(HttpServletRequest request, @RequestParam(value = "page",required = false,defaultValue = "1") int page, @RequestParam(value = "limit",required = false,defaultValue = "5")int limit,@RequestParam(value = "key",required = false,defaultValue = "")String key,@RequestParam(value = "value",required = false,defaultValue = "") String value)
PageHelper.startPage(page,limit); //?代码省略方式
List<Orders> all =null;
switch (key) //key:匹配orderNum 或productName;再做查询;
case "orderNum":
all= ordersService.findAll(value,null);break;
case "productName":
all= ordersService.findAll(null,value);break;
case "":
all= ordersService.findAll(null,null);
request.setAttribute("select",key);
request.setAttribute("selectValue",value);
PageInfo<Orders> pageInfo=new PageInfo<>(all);
request.setAttribute("pageInfo",pageInfo);
return "/orders-list";
2.3.3 优化的OrderController
@RequestMapping("/findAll")
public ModelAndView findAll(@RequestParam(name = "page",defaultValue = "1")int pageNum,
@RequestParam(name = "limit",defaultValue = "5")int pageSize,
@RequestParam(name = "key",defaultValue = "")String key,
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