ssm 订单功能实现

1.创建OrderController.java写上增删查改方法

注:查分两种
1 .查询所有信息返回
2.根据id查询信息返回当前order元组信息

package com.tedu.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.tedu.pojo.Order;

@Controller
public class OrderController {
	
	/**1.查询所有订单信息*/
	@RequestMapping("/orderList")
	public String orderList(){
		return"order_list";
	}
	
	/**2.根据id删除订单信息,所以要添加一个参数接受id*/
	@RequestMapping("/orderDelete")
	public String orderDelete(Integer id){
		
		//删除完后跳转到查询所有订单的方法,显示最新的订单
		return "forward:/orderList";
	}
	
	/**3.新增订单信息*/
	@RequestMapping("/orderAdd")
	public String orderAdd(Order order){
		
		//添加完后跳转到查询所有订单的方法,显示最新的订单
		return "forward:/orderList";
	}
	
	/**4.根据id查询订单信息,查询时为了修改,回显查询信息*/
	@RequestMapping("/orderInfo")
	public String orderInfo(){
		
		//将订单信息带到订单修改jsp页面 ,进行数据的回显
		return "order_update";
	}
	/**5.根据id修改订单信息*/
	@RequestMapping("/orderUpdate")
	public String orderUpdate(Order order){
		
		//修改完后跳转到查询所有订单的方法,显示最新的订单
		return "forward:/orderList";
	}

}

2.创建OrderMapper.java接口写上增删查改方法

偷懒方法,借用上个Door模块
复制DoorMapper文件,改名为OrderMapper
选择’门店’ Ctrl+F 替换为订单
选择"Door" Ctrl+F替换为Order 选择Case senstive区分大小写
选择"door" Ctrl+F替换为order

package com.tedu.dao;
import java.util.List;
import com.tedu.pojo.Order;

/**
 * OrderMapper接口 
 * 声明增删改查方法,对订单信息进行操作
 */
public interface OrderMapper {
	/** 1.查询所有订单信息*/
	public List<Order> findAll();
	/** 2.根据id删除信息*/
	public void deleteById(Integer id);
	/** 3.根据id删除信息*/
	public void add(Order order);
	/** 4.根据id查询订单信息*/
	public Order findById(Integer id);
	/** 5.根据id修改订单信息*/
	public void updateById(Order order);

}

3创建OrderMapper.xml配置方法对应的sql语句.

3.1解决当数据表中的列名和pojo类中的属性名不一致的问题:resultType改为resultMap

3.2复制DoorMapper.xml,ctrl+f修改后再调整

<?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">
<!-- 订单表的映射文件 namespace值为对应接口的全路径 -->
<mapper namespace="com.tedu.dao.OrderMapper">
	<!-- 
		resultMap 是为了解决 当数据表中的列名和
			pojo类中的属性名不一致的问题
		resultMap 中配置了 数据表中的列 和 pojo类
			中的属性 之间的对应关系 (也就是映射)
	 -->
	<resultMap type="com.tedu.pojo.Order"
				id="orderRM">
		<id column="id" property="id"/>
		<result column="door_id" property="doorId" />
		<result column="order_no" property="orderNo"/>
		<result column="order_type" property="orderType"/>
		<result column="pnum" property="pnum"/>
		<result column="cashier" property="cashier"/>
		<result column="order_time" property="orderTime"/>
		<result column="pay_time" property="payTime"/>
		<result column="pay_type" property="payType"/>
		<result column="price" property="price"/>
	</resultMap>
	<!-- 1.查询所有订单
		tb_order表中的列和Order类中的属性名
		不一致会导致数据封装失败!!!
		id			id		setId()
		door_id		doorId	setDoorId()
		如果表中的列和pojo类中的属性名不一致
		这里需要将resultType改为resultMap
	 -->
	<select id="findAll" resultMap="orderRM">
		select * from tb_order
	</select>
	
	<!--2.根据id删除订单信息 -->
	<delete id="deleteById">
		delete from tb_order where id=#{id}
	</delete>
	
	<!--3.添加订单信息  -->
	<insert id="add">
		insert into tb_order values(null,#{door_id},#{order_no},#{order_type},#{#pnum},#{cashier},
			#{order_time},#{pay_time},#{pay_type},#{price})
	</insert>
	
	<!--4.根据id查询信息  -->
	<select id="findById" resultType="com.tedu.pojo.Order">
		select * from tb_order where id = #{id}
	</select>
	
	<!--5.根据id修改订单信息,id值等于方法名  -->
	<update id="updateById">
		update tb_order set values(null,#{door_id},#{order_no},#{order_type},#{#pnum},#{cashier},
			#{order_time},#{pay_time},#{pay_type},#{price}
		where id=#{id}
	</update>
</mapper>

4创建Order实体,source自动生成get,set方法.注意使用java命名规则,数据库列名为door_id,java对应为doorId.

package com.tedu.pojo;

import java.util.Date;

/**
 * 订单信息类, 用于封装订单信息
 */
//数据库用_连接两个单词,java用驼峰法.如何让两种命名规范都满足.
public class Order {
	//1.声明属性
	private Integer id;		//id
	private Integer doorId;	//door_id
	private String orderNo; //order_no
	private String orderType;//order_type
	private Integer pnum;	//pnum
	private String cashier;	//carshier
	private Date orderTime;	//order_time
	private Date payTime;	//pay_time
	private String payType;	//pay_type
	private Double price;	//price
	//2.提供getter和setter方法
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public Integer getDoorId() {
		return doorId;
	}
	public void setDoorId(Integer doorId) {
		this.doorId = doorId;
	}
	public String getOrderNo() {
		return orderNo;
	}
	public void setOrderNo(String orderNo) {
		this.orderNo = orderNo;
	}
	public String getOrderType() {
		return orderType;
	}
	public void setOrderType(String orderType) {
		this.orderType = orderType;
	}
	public Integer getPnum() {
		return pnum;
	}
	public void setPnum(Integer pnum) {
		this.pnum = pnum;
	}
	public String getCashier() {
		return cashier;
	}
	public void setCashier(String cashier) {
		this.cashier = cashier;
	}
	public Date getOrderTime() {
		return orderTime;
	}
	public void setOrderTime(Date orderTime) {
		this.orderTime = orderTime;
	}
	public Date getPayTime() {
		return payTime;
	}
	public void setPayTime(Date payTime) {
		this.payTime = payTime;
	}
	public String getPayType() {
		return payType;
	}
	public void setPayType(String payType) {
		this.payType = payType;
	}
	public Double getPrice() {
		return price;
	}
	public void setPrice(Double price) {
		this.price = price;
	}
	//3.重写toString
	@Override
	public String toString() {
		return "Order [id=" + id + ", doorId=" + doorId + ", orderNo=" + orderNo + ", orderType=" + orderType
				+ ", pnum=" + pnum + ", cashier=" + cashier + ", orderTime=" + orderTime + ", payTime=" + payTime
				+ ", payType=" + payType + ", price=" + price + "]";
	}
}

5order_list.jsp文件

注:
涉及door和order的外键约束,查询数据时需要连接两个基本表
"${ door.id==order.doorId }"

<%@ page pageEncoding="utf-8"%>
<%-- 引入JSTL标签库 --%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<!DOCTYPE HTML>
<html>
<head>
<title>订单管理</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<style type="text/css">
body {
	font-family: "微软雅黑";
	background-color: #EDEDED;
}

h2 {
	text-align: center;
}

table {
	width: 96%;
	margin: 0 auto;
	text-align: center;
	border-collapse: collapse;
	font-size: 16px;
}

td, th {
	padding: 5px;
}

th {
	background-color: #DCDCDC;
	width: 120px;
}

th.width-40 {
	width: 40px;
}

th.width-50 {
	width: 50px;
}

th.width-64 {
	width: 64px;
}

th.width-80 {
	width: 80px;
}

th.width-120 {
	width: 100px;
}

hr {
	margin-bottom: 20px;
	border: 1px solid #aaa;
}

#add-order {
	text-align: center;
	font-size: 20px;
}
</style>

<script type="text/javascript">
	
</script>
</head>
<body>
	<h2>订单管理</h2>
	<div id="add-order">
		<a href="findAllDoorToOrder_add" target="rightFrame">新增订单</a>
	</div>
	<hr />
	<table border="1">
		<tr>
			<th class="width-40">序号</th>
			<th class="width-120">所属门店</th>
			<th class="width-50">订单号</th>
			<th class="width-40">类型</th>
			<th class="width-40">人数</th>
			<th class="width-50">收银员</th>
			<th class="width-120">下单时间</th>
			<th class="width-120">结账时间</th>
			<th class="width-50">支付方式</th>
			<th class="width-50">金额</th>
			<th class="width-80">操 作</th>
		</tr>

		<!-- 模版数据 -->
		<c:forEach items="${ list }" var="order" varStatus="status">
			<tr>
				<td>${ status.count }</td>

				<!-- 显示订单所属性门店名称 -->
				<c:forEach items="${doorList}" var="door">
					<c:if test="${ door.id==order.doorId }">
						<!--连接两张表  -->
						<td class="1111">${ door.name }</td>
					</c:if>
				</c:forEach>

				<td>${ order.orderNo }</td>
				<script>
					//获取后端设置的值
					var orderNo = "${ order.orderNo }";
					console.log(orderNo);
				</script>

				<td>${ order.orderType }</td>
				<td>${ order.pnum }</td>
				<td>${ order.cashier }</td>
				<td><fmt:formatDate value="${ order.orderTime }"
						pattern="yyyy-MM-dd HH:mm:ss" /></td>
				<td><fmt:formatDate value="${ order.payTime }"
						pattern="yyyy-MM-dd HH:mm:ss" /></td>
				<td>${ order.payType }</td>
				<td>${ order.price }</td>
				<td><a href="orderDelete?id=${ order.id }">删除</a> | <a
					href="orderInfo?id=${ order.id }">修改</a></td>
			</tr>
		</c:forEach>

	</table>
</body>
</html>