JavaWeb_CartDemo-购物车 + 收藏 + 浏览记录 + 分页 + 模糊查询（附：404、500、编码过滤）

package com.imooc.cart.data; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; /** * * 本地缓存 * * @version 1.0 */ public final class LocalCache { private static Map<Long, Product> productMap = new HashMap<>(); private static Map<Long, Cart> cartMap = new HashMap<>(); private static Map<Long, Product> favoriteMap = new HashMap<>(); private static Map<Long, Product> browseLogMap = new HashMap<>(); static { productMap.put(1l, new Product(1l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(2l, new Product(2l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(3l, new Product(3l, "JAVA", "JAVA基础课程-基本语法", "介绍java基本语法特性及编写规范", "初级", 219)); productMap.put(4l, new Product(4l, "JAVA", "JAVA基础课程-JDBC", "介绍JDBC方式连接数据库", "初级", 219)); productMap.put(5l, new Product(5l, "JAVA", "JAVA基础课程—Socket", "介绍Java网络编程Socket", "初级", 219)); productMap.put(6l, new Product(6l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(7l, new Product(7l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(8l, new Product(8l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(9l, new Product(9l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(10l, new Product(10l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(11l, new Product(11l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(12l, new Product(12l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(13l, new Product(13l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(14l, new Product(14l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(15l, new Product(15l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(16l, new Product(16l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(17l, new Product(17l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(18l, new Product(18l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(19l, new Product(19l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(20l, new Product(20l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(21l, new Product(21l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(22l, new Product(22l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(23l, new Product(23l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(24l, new Product(24l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); productMap.put(25l, new Product(25l, "HTML/CSS", "HTML+CSS基础课程", "HTML+CSS基础教程8小时带领大家步步深入学习标签用法和意义", "初级", 219)); } private LocalCache() {} public static List<Product> getProducts() { return new ArrayList<>(productMap.values()); } public static Product getProduct(Long id) { return productMap.get(id); } public static void addCart(Product product) { if (!cartMap.containsKey(product.getId())) { cartMap.put(product.getId(), new Cart(product.getId(), product.getId(), product.getName(), product.getPrice(), 1)); } else { incrCart(product.getId()); } } public static List<Cart> getCarts() { return new ArrayList<>(cartMap.values()); } public static void delCart(Long productId) { cartMap.remove(productId); } public static void incrCart(Long productId) { cartMap.get(productId).incrCount(); } public static void decrCart(Long productId) { boolean result = cartMap.get(productId).decrCount(); if (result) { cartMap.remove(productId); } } public static Cart getCart(Long id) { return cartMap.get(id); } public static void addFavorite(Product product) { if (!favoriteMap.containsKey(product.getId())) { favoriteMap.put(product.getId(), product); } } public static void delFavorite(Long productId) { if (favoriteMap.containsKey(productId)) { favoriteMap.remove(productId); } } public static List<Product> getFavorites() { return new ArrayList<>(favoriteMap.values()); } public static void addBrowseLog(Product product) { browseLogMap.put(product.getId(), product); } public static void deleteBrowseLog(Long productId) { browseLogMap.remove(productId); } public static List<Product> getBrowseLogs() { return new ArrayList<>(browseLogMap.values()); } public static List<Product> getProducts(int page, int size, String name) { List<Product> products = new ArrayList<>(); if (null != name && !"".equals(name)) { productMap.values().forEach(product -> { if (product.getName().contains(name)) { products.add(product); } }); } else { products.addAll(productMap.values()); } int start = (page - 1) * size; int end = products.size() >= page * size ? page * size : products.size(); return products.subList(start, end); } public static int getProductsCount(String name) { List<Product> products = new ArrayList<>(); if (null != name && !"".equals(name)) { productMap.values().forEach(product -> { if (product.getName().contains(name)) { products.add(product); } }); } else { products.addAll(productMap.values()); } return products.size(); } }