8.4-高并发下的互联网电商购物车实战-相关VO类和数据准备
高并发下的互联网电商购物车实战-相关VO类和数据准备
简介：高并发下的互联网电商购物车实战-相关VO类和数据准备
VideoDO类
CartItemVO
public class CartItemVO {
/**
* 商品id
*/
private Integer productId;
/**
* 购买数量
*/
private Integer buyNum;
/**
* 商品标题
*/
private String productTitle;
/**
* 图片
*/
private String productImg;
/**
* 商品单价
*/
private int price ;
/**
* 总价格，单价+数量
*/
private int totalPrice;
public int getProductId() {
return productId;
}
public void setProductId(int productId) {
this.productId = productId;
}
public Integer getBuyNum() {
return buyNum;
}
public void setBuyNum(Integer buyNum) {
this.buyNum = buyNum;
}
public String getProductTitle() {
return productTitle;
}
public void setProductTitle(String productTitle) {
this.productTitle = productTitle;
}
public String getProductImg() {
return productImg;
}
public void setProductImg(String productImg) {
this.productImg = productImg;
}
/**
* 商品单价 * 购买数量
* @return
*/
public int getTotalPrice() {
return this.price*this.buyNum;
}
public int getPrice() {
return price;
}
public void setPrice(int price) {
this.price = price;
}
public void setTotalPrice(int totalPrice) {
this.totalPrice = totalPrice;
}
}
CartIVO
public class CartVO {
/**
* 购物项
*/
private List<CartItemVO> cartItems;
/**
* 购物车总价格
*/
private Integer totalAmount;
/**
* 总价格
* @return
*/
public int getTotalAmount() {
return cartItems.stream().mapToInt(CartItemVO::getTotalPrice).sum();
}
public List<CartItemVO> getCartItems() {
return cartItems;
}
public void setCartItems(List<CartItemVO> cartItems) {
this.cartItems = cartItems;
}
}
数据源层
@Repository
public class VideoDao {
private static Map<Integer,VideoDO> map = new HashMap<>();
static {
map.put(1,new VideoDO(1,"工业级PaaS云平台+SpringCloudAlibaba 综合项目实战(完结)","https://xdclass.net",1099));
map.put(2,new VideoDO(2,"玩转新版高性能RabbitMQ容器化分布式集群实战","https://xdclass.net",79));
map.put(3,new VideoDO(3,"新版后端提效神器MybatisPlus+SwaggerUI3.X+Lombok","https://xdclass.net",49));
map.put(4,new VideoDO(4,"玩转Nginx分布式架构实战教程 零基础到高级","https://xdclass.net",49));
map.put(5,new VideoDO(5,"ssm新版SpringBoot2.3/spring5/mybatis3","https://xdclass.net",49));
map.put(6,new VideoDO(6,"新一代微服务全家桶AlibabaCloud+SpringCloud实战","https://xdclass.net",59));
}
/**
* 模拟从数据库找
* @param videoId
* @return
*/
public VideoDO findDetailById(int videoId) {
return map.get(videoId);
}
}
json工具类
public class JsonUtil {
// 定义jackson对象
private static final ObjectMapper MAPPER = new ObjectMapper();
/**
* 将对象转换成json字符串。
* @return
*/
public static String objectToJson(Object data) {
try {
String string = MAPPER.writeValueAsString(data);
return string;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 将json结果集转化为对象
*
* @param jsonData json数据
* @param clazz 对象中的object类型
* @return
*/
public static <T> T jsonToPojo(String jsonData, Class<T> beanType) {
try {
T t = MAPPER.readValue(jsonData, beanType);
return t;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
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