购物车模块

create table t_cart(id int primary key auto_increment,　　//主键
                   	goods_id varchar(200),　　　//商品的ｉｄ
                    uid int,　　				//用户的id
                    num int, 				//商品的数量
                    created_user varchar(50),  
                    created_time datetime,
                    modified_user varchar(50),
                    modified_time datetime
                   )default charset=utf8;

/**
 * 购物车的值对象
 * 用于接收多表连接查询的结果
 * @author chenjiabing
 */
public class CartVo implements Serializable {
	private static final long serialVersionUID = 8904622535687816912L;
	private Integer id;    //主键 购物车表中的主键
	private String goodsId;  //商品的id
	private Integer uid;  //用户id
	private String image;  //图片地址
	private String title;  //商品标题
	private Integer price; //商品价格
	private Integer num;  //数量
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getGoodsId() {
		return goodsId;
	}
	public void setGoodsId(String goodsId) {
		this.goodsId = goodsId;
	}
	public Integer getUid() {
		return uid;
	}
	public void setUid(Integer uid) {
		this.uid = uid;
	}
	public String getImage() {
		return image;
	}
	public void setImage(String image) {
		this.image = image;
	}
	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	public Integer getPrice() {
		return price;
	}
	public void setPrice(Integer price) {
		this.price = price;
	}
	public Integer getNum() {
		return num;
	}
	public void setNum(Integer num) {
		this.num = num;
	}
	@Override
	public String toString() {
		return "CartVo [id=" + id + ", goodsId=" + goodsId + ", uid=" + uid
				+ ", image=" + image + ", title=" + title + ", price=" + price
				+ ", num=" + num + "]";
	}
	
}

/**
 * 根据uid查询购物车中的所有商品
 * @param uid  用户id
 * @return   查询的结果
 */
List<CartVo> selectCartByUid(Integer uid);

<!-- 
		List<CartVo> selectCartByUid(Integer uid);
	 -->
	 <select id="selectCartByUid" resultType="cn.tedu.store.bean.CartVo">
	 		select 
	 		c.id as id,
	 		c.uid as uid,
	 		goods_id as goodsId,
	 		image,
	 		title,
	 		c.num as num,
	 		price
	 		from t_cart c,t_goods g
	 		where c.uid=#{uid} and c.goods_id=g.id
	 </select>

/**
 * 根据id删除购物车中的商品
 * @param ids
 */
void deleteCartById(@Param("ids")Integer[] ids);

<!-- 
 	void deleteCartById(@Param("ids")Integer[] ids);
 	批量删除
  -->
  <delete id="deleteCartById" parameterType="java.lang.Integer">
  		delete from t_cart 
  		where
  		id in
  		<!-- 
  			遍历数组ids
  			collection:需要遍历的数组
  			item: 数组中的每一个值
  			open ： 开始的内容
  			close: 结束的内容
  			separator ：每个元素的分割符
  			最后拼接的就是  (id,id,id,id,id)
  		 -->
  		<foreach collection="ids" item="id" open="(" separator="," close=")">
  			#{id}
  		</foreach> 
  </delete>

/**
 * 批量删除商品
 * @param Itemids  数组，其中全是id
 * @return
 */
@RequestMapping("/moveCartBatch.do")
public String moveCartBatch(Integer[] Itemids){
	System.out.println(Itemids);
	cartService.moveCartById(Itemids);
	return "redirect:../cart/showCart.do";
}

delimiter $$
	create procedure deleteCart(pid int)
	begin
		delete from t_cart where id=pid;
	end $$

drop procedure 存储过程名称
比如： drop procedure deleteCart;

call deleteCart(5);

/**
 * 调用存储过程 deleteCart(pid int)删除数据
 * @param id
 */
void deleteCartByIdProcdure(Integer id);

<!-- 
	  	void deleteCartByIdProcdure(Integer id);
	  	使用存储过程删除
	   -->
	   
	   	<delete id="deleteCartByIdProcdure">
	   		{call deleteCart(#{id})}
	   	</delete>

delimiter $$
create procedure updateNum(pid int,pnum int)
begin
	update t_cart set num=pnum where id=pid;
end $$