由于一些特别的原因 需要判定当前时间是否在某个特定的范围
以下是一个根据数据库里面规定的日期选择是否打折，以及打几折的一个DEMO
1 /* 2 Navicat Premium Data Transfer 3 4 Source Server : localhost_3306 5 Source Server Type : MySQL 6 Source Server Version : 80017 7 Source Host : localhost:3306 8 Source Schema : shop 9 10 Target Server Type : MySQL 11 Target Server Version : 80017 12 File Encoding : 65001 13 14 Date: 30/08/2019 11:48:48 15 */ 16 17 SET NAMES utf8mb4; 18 SET FOREIGN_KEY_CHECKS = 0; 19 20 -- ---------------------------- 21 -- Table structure for activity 22 -- ---------------------------- 23 DROP TABLE IF EXISTS `activity`; 24 CREATE TABLE `activity` ( 25 `activityId` int(10) UNSIGNED NOT NULL AUTO_INCREMENT COMMENT '活动编号', 26 `activityName` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '活动名称', 27 `begin` datetime(0) NOT NULL COMMENT '开始时间', 28 `finish` datetime(0) NOT NULL COMMENT '结束时间', 29 `discount` decimal(5, 2) UNSIGNED NOT NULL COMMENT '折扣', 30 PRIMARY KEY (`activityId`) USING BTREE 31 ) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic; 32 33 -- ---------------------------- 34 -- Records of activity 35 -- ---------------------------- 36 INSERT INTO `activity` VALUES (1, '双十一', '2019-11-11 00:00:00', '2019-11-11 23:23:59', 0.95); 37 INSERT INTO `activity` VALUES (2, '618', '2019-06-18 00:00:00', '2019-06-18 23:59:59', 0.95); 38 INSERT INTO `activity` VALUES (3, '今天', '2019-08-30 00:00:00', '2019-08-30 23:59:59', 0.80); 39 40 -- ---------------------------- 41 -- Table structure for cart 42 -- ---------------------------- 43 DROP TABLE IF EXISTS `cart`; 44 CREATE TABLE `cart` ( 45 `userId` int(11) NOT NULL DEFAULT 0 COMMENT '用户id', 46 `c_id` int(11) NOT NULL COMMENT '商品id', 47 `camount` int(15) NOT NULL COMMENT '商品数量' 48 ) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic; 49 50 -- ---------------------------- 51 -- Records of cart 52 -- ---------------------------- 53 INSERT INTO `cart` VALUES (1, 3, 0); 54 INSERT INTO `cart` VALUES (2, 2, 0); 55 INSERT INTO `cart` VALUES (1, 2, 0); 56 INSERT INTO `cart` VALUES (1, 3, 0); 57 INSERT INTO `cart` VALUES (1, 7, 0); 58 INSERT INTO `cart` VALUES (1, 1, 0); 59 INSERT INTO `cart` VALUES (1, 3, 0); 60 INSERT INTO `cart` VALUES (1, 16, 0); 61 62 -- ---------------------------- 63 -- Table structure for classify 64 -- ---------------------------- 65 DROP TABLE IF EXISTS `classify`; 66 CREATE TABLE `classify` ( 67 `classify_id` int(11) NOT NULL AUTO_INCREMENT COMMENT '商品类型id', 68 `classify_name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '商品类型名称', 69 PRIMARY KEY (`classify_id`) USING BTREE 70 ) ENGINE = InnoDB AUTO_INCREMENT = 16 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic; 71 72 -- ---------------------------- 73 -- Records of classify 74 -- ---------------------------- 75 INSERT INTO `classify` VALUES (1, '手机'); 76 INSERT INTO `classify` VALUES (2, '电脑'); 77 INSERT INTO `classify` VALUES (3, '键盘'); 78 INSERT INTO `classify` VALUES (4, '鼠标'); 79 INSERT INTO `classify` VALUES (5, '平板'); 80 INSERT INTO `classify` VALUES (6, '耳机'); 81 INSERT INTO `classify` VALUES (7, '无线充电器'); 82 INSERT INTO `classify` VALUES (8, '皮带'); 83 INSERT INTO `classify` VALUES (9, '刮胡刀'); 84 INSERT INTO `classify` VALUES (10, '音响'); 85 INSERT INTO `classify` VALUES (11, '打火机'); 86 INSERT INTO `classify` VALUES (12, '手表'); 87 INSERT INTO `classify` VALUES (13, '手环'); 88 INSERT INTO `classify` VALUES (14, '硬盘'); 89 INSERT INTO `classify` VALUES (15, 'U盘'); 90 INSERT INTO `classify` VALUES (16, '路由器'); 91 92 -- ---------------------------- 93 -- Table structure for commodity 94 -- ---------------------------- 95 DROP TABLE IF EXISTS `commodity`; 96 CREATE TABLE `commodity` ( 97 `c_id` int(11) NOT NULL AUTO_INCREMENT COMMENT '商品id', 98 `classify_id` int(11) NOT NULL COMMENT '商品类型', 99 `c_name` varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '商品名', 100 `price` double(50, 2) UNSIGNED NOT NULL DEFAULT 0.00 COMMENT '价格', 101 `sales` int(11) UNSIGNED NOT NULL DEFAULT 0 COMMENT '销量', 102 `inventory` int(11) UNSIGNED NOT NULL DEFAULT 0 COMMENT '库存', 103 PRIMARY KEY (`c_id`) USING BTREE 104 ) ENGINE = InnoDB AUTO_INCREMENT = 106 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic; 105 106 -- ---------------------------- 107 -- Records of commodity 108 -- ---------------------------- 109 INSERT INTO `commodity` VALUES (1, 0, '小米5S', 2999.00, 51, 99); 110 INSERT INTO `commodity` VALUES (2, 0, 'dgfd ', 34.00, 50, 100); 111 INSERT INTO `commodity` VALUES (3, 0, 'fdgh', 456.70, 50, 100); 112 INSERT INTO `commodity` VALUES (6, 1, '苹果 xr', 5888.00, 16666, 5822); 113 INSERT INTO `commodity` VALUES (7, 1, '苹果 8Plus', 4988.00, 15661, 1789); 114 INSERT INTO `commodity` VALUES (8, 1, '华为 P30pro', 4988.00, 8099, 2796); 115 INSERT INTO `commodity` VALUES (9, 1, '华为 mate20', 4499.00, 7933, 1988); 116 INSERT INTO `commodity` VALUES (10, 1, 'VIVO/步步高 iqoo5g', 3198.00, 1759, 2124); 117 INSERT INTO `commodity` VALUES (11, 2, 'Lenovo/联想 Y7000酷', 6399.00, 243, 2451); 118 INSERT INTO `commodity` VALUES (12, 2, 'Apple/苹果 MacBook Air', 8099.00, 1700, 1238); 119 INSERT INTO `commodity` VALUES (13, 2, 'Huawei/华为 MateBook X Pro', 7999.00, 1060, 2541); 120 INSERT INTO `commodity` VALUES (14, 2, 'Hasee/神州 战神i7 GTX1600Ti', 6999.00, 2191, 1447); 121 INSERT INTO `commodity` VALUES (15, 2, 'Dell/戴尔 GTX1650 ', 5698.00, 1820, 2143); 122 INSERT INTO `commodity` VALUES (16, 2, 'HP/惠普 暗影精灵5/光影精灵5', 5799.00, 1775, 1789); 123 INSERT INTO `commodity` VALUES (17, 2, 'Asus/华硕 灵耀S2代s4300FN8代', 4899.00, 1144, 541); 124 INSERT INTO `commodity` VALUES (18, 2, 'Asus/华硕 X505 超薄', 2999.00, 1019, 275); 125 INSERT INTO `commodity` VALUES (19, 2, 'Dell/戴尔 5584—灵越酷睿8代i5-8265U', 3999.00, 1000, 1423); 126 INSERT INTO `commodity` VALUES (20, 2, '小米笔记本 RedmiBook i5', 4299.00, 980, 2564); 127 INSERT INTO `commodity` VALUES (21, 3, 'FLICO/斐尔可 机械键盘 104键', 969.00, 191, 1582); 128 INSERT INTO `commodity` VALUES (22, 3, 'FLICO/斐尔可 机械键盘 87键', 869.00, 165, 1741); 129 INSERT INTO `commodity` VALUES (23, 3, 'Keycool/凯酷 87键蓝牙机械键盘', 369.00, 114, 1470); 130 INSERT INTO `commodity` VALUES (24, 3, 'IQUNX F60蓝牙双模机械键盘cherry轴', 599.00, 147, 1252); 131 INSERT INTO `commodity` VALUES (25, 3, 'IQUNX F96JOKER蓝牙双模机械键盘', 0.00, 0, 0); 132 INSERT INTO `commodity` VALUES (26, 3, 'IQUNX F96JOKER蓝牙双模机械键盘', 1288.00, 472, 1527); 133 INSERT INTO `commodity` VALUES (27, 3, 'IQUNX PINK粉机械键盘F96', 1099.00, 143, 1472); 134 INSERT INTO `commodity` VALUES (28, 3, 'ANNE/安妮 ANNE pro蓝牙机械键盘', 499.00, 536, 89); 135 INSERT INTO `commodity` VALUES (29, 3, 'varmiluo/阿米洛 87Mac机械键盘', 699.00, 165, 477); 136 INSERT INTO `commodity` VALUES (30, 3, 'varmiluo/阿米洛 双模机械键盘海韵静电荣轴', 729.00, 836, 1247); 137 INSERT INTO `commodity` VALUES (31, 4, '罗技 G102有线电竞游戏鼠标', 109.00, 12000, 5622); 138 INSERT INTO `commodity` VALUES (32, 4, '罗技 G502RGB有线鼠标', 279.00, 286, 452); 139 INSERT INTO `commodity` VALUES (33, 4, '罗技 G502无线游戏鼠标', 1099.00, 233, 1436); 140 INSERT INTO `commodity` VALUES (34, 4, 'Razer/雷蛇 炼狱蝰蛇游戏鼠标专用', 129.00, 13000, 8000); 141 INSERT INTO `commodity` VALUES (35, 4, 'Razer/雷蛇 蝮蛇竞技版鼠标', 379.00, 445, 1899); 142 INSERT INTO `commodity` VALUES (36, 4, '赛睿/rival 电竞游戏鼠标', 179.00, 459, 124); 143 INSERT INTO `commodity` VALUES (37, 4, '双飞燕 血手幽灵游戏鼠标', 169.00, 1636, 1494); 144 INSERT INTO `commodity` VALUES (38, 4, '雷柏 MT750S蓝牙无线鼠标', 179.00, 933, 1522); 145 INSERT INTO `commodity` VALUES (39, 4, '小米 无线游戏鼠标', 229.00, 136, 147); 146 INSERT INTO `commodity` VALUES (40, 4, '雷柏 VT950无线游戏鼠标', 329.00, 68, 23); 147 INSERT INTO `commodity` VALUES (41, 5, 'Huawei/华为 M6', 2699.00, 14000, 27555); 148 INSERT INTO `commodity` VALUES (42, 5, 'Huawei/华为 M5青春版', 1199.00, 3632, 2895); 149 INSERT INTO `commodity` VALUES (43, 5, 'Apple/苹果 ipad 2018款Air', 3869.00, 6203, 785); 150 INSERT INTO `commodity` VALUES (44, 5, 'Xiaomi/小米 小米平板2', 369.00, 10, 1477); 151 INSERT INTO `commodity` VALUES (45, 5, 'Apple/苹果 ipadmini5 ', 2258.00, 1346, 2658); 152 INSERT INTO `commodity` VALUES (46, 5, 'Apple/苹果 ipad Pro 11', 3608.00, 1052, 2588); 153 INSERT INTO `commodity` VALUES (47, 5, '荣耀 荣耀平板5', 1199.00, 630, 253); 154 INSERT INTO `commodity` VALUES (48, 5, 'Jumper/中柏 EZpad GO', 1849.00, 253, 2147); 155 INSERT INTO `commodity` VALUES (49, 5, 'Huawei/华为 华为畅享平板m6', 1138.00, 125, 1473); 156 INSERT INTO `commodity` VALUES (50, 5, '小米 小米平板4', 1099.00, 2496, 124); 157 INSERT INTO `commodity` VALUES (51, 6, '三星AKG 原装耳机note8', 35.00, 3216, 1489); 158 INSERT INTO `commodity` VALUES (52, 6, '苹果 原装耳机3.5mm', 189.00, 1814, 50458); 159 INSERT INTO `commodity` VALUES (53, 6, '苹果原装耳机 Lightning接口', 189.00, 9607, 48953); 160 INSERT INTO `commodity` VALUES (54, 6, '苹果 AirPods', 1246.00, 77000, 84000); 161 INSERT INTO `commodity` VALUES (55, 6, 'Beats solo3 wireless无线蓝牙耳机', 678.00, 2900, 2685); 162 INSERT INTO `commodity` VALUES (56, 6, 'Beats BeatsX 耳塞无线蓝牙耳机', 799.00, 1988, 8412); 163 INSERT INTO `commodity` VALUES (57, 6, 'Beats BeatsURBEATS3.0魔音', 486.00, 982, 1455); 164 INSERT INTO `commodity` VALUES (58, 6, 'VIVO vivoX21原装耳机', 68.00, 438, 1989); 165 INSERT INTO `commodity` VALUES (59, 6, 'VIVO vivoXE100', 36.00, 152, 986); 166 INSERT INTO `commodity` VALUES (60, 6, 'OPPO MH135', 59.00, 13000, 14007); 167 INSERT INTO `commodity` VALUES (61, 7, '紫米/zimi 紫米无线充电器', 99.00, 586, 12777); 168 INSERT INTO `commodity` VALUES (62, 8, '卓凡 阿尼玛皮带', 158.00, 7402, 2895); 169 INSERT INTO `commodity` VALUES (63, 8, '花花公子皮带', 49.00, 18000, 28914); 170 INSERT INTO `commodity` VALUES (64, 8, '稻草人皮带', 59.00, 24000, 14755); 171 INSERT INTO `commodity` VALUES (65, 8, '七匹狼皮带', 129.00, 581, 2514); 172 INSERT INTO `commodity` VALUES (66, 8, '金利来皮带', 259.00, 5427, 3615); 173 INSERT INTO `commodity` VALUES (67, 9, '博朗剃须刀', 899.00, 3758, 4815); 174 INSERT INTO `commodity` VALUES (68, 9, '飞科剃须刀', 59.00, 12045, 58411); 175 INSERT INTO `commodity` VALUES (69, 9, '小米剃须刀', 79.00, 6038, 14855); 176 INSERT INTO `commodity` VALUES (70, 9, '飞利浦剃须刀', 229.00, 52000, 14772); 177 INSERT INTO `commodity` VALUES (71, 10, 'EARISE/雅兰仕 H2笔记本音响', 8.90, 50955, 14751); 178 INSERT INTO `commodity` VALUES (72, 10, '小米小艾音响', 99.00, 26140, 4715); 179 INSERT INTO `commodity` VALUES (73, 10, '天猫精灵音响', 89.00, 41504, 12483); 180 INSERT INTO `commodity` VALUES (74, 11, 'zippo打火机', 150.00, 3435, 28456); 181 INSERT INTO `commodity` VALUES (75, 11, 'ZORRO煤油打火机', 37.00, 6911, 1477); 182 INSERT INTO `commodity` VALUES (76, 11, 'Cricket草蜢打火机', 21.90, 2031, 4511); 183 INSERT INTO `commodity` VALUES (77, 12, '天王手表GS31091', 949.00, 1457, 12487); 184 INSERT INTO `commodity` VALUES (78, 12, '罗西尼MTP-1375', 398.00, 3654, 14784); 185 INSERT INTO `commodity` VALUES (79, 12, '卡西欧防水钢表', 388.00, 2444, 12487); 186 INSERT INTO `commodity` VALUES (80, 12, '依波机自动机械表', 1169.00, 14557, 21478); 187 INSERT INTO `commodity` VALUES (81, 12, '飞亚达女表钢带', 520.00, 1245, 14552); 188 INSERT INTO `commodity` VALUES (82, 13, '小米手环4', 169.00, 14553, 48551); 189 INSERT INTO `commodity` VALUES (83, 13, '华为荣耀手环', 219.00, 48751, 95441); 190 INSERT INTO `commodity` VALUES (84, 14, '希捷高速USB3.0移动2T', 499.00, 1884, 14745); 191 INSERT INTO `commodity` VALUES (85, 14, '希捷高速USB3.0移动1T', 355.00, 3309, 15843); 192 INSERT INTO `commodity` VALUES (86, 14, '东芝Usb3.0移动1T', 329.00, 4184, 12452); 193 INSERT INTO `commodity` VALUES (87, 14, '纽曼移动硬盘2T', 79.00, 13000, 25482); 194 INSERT INTO `commodity` VALUES (88, 14, '西部数据USB3.0高速移动银盘1T', 288.60, 1423, 4854); 195 INSERT INTO `commodity` VALUES (89, 14, '蓝硕USB3.0移动硬盘500g', 55.00, 460, 2841); 196 INSERT INTO `commodity` VALUES (90, 15, '惠普U盘32g', 29.00, 1550, 4812); 197 INSERT INTO `commodity` VALUES (91, 15, '三星U盘32g', 70.00, 10, 551); 198 INSERT INTO `commodity` VALUES (92, 15, '金士顿16g', 31.90, 1363, 4851); 199 INSERT INTO `commodity` VALUES (93, 15, '夏科U盘256gUSB3.0', 149.00, 1478, 15473); 200 INSERT INTO `commodity` VALUES (94, 15, '爱国者U盘32g', 32.90, 33007, 48451); 201 INSERT INTO `commodity` VALUES (95, 15, '闪迪U盘64g', 59.90, 18236, 25412); 202 INSERT INTO `commodity` VALUES (96, 16, '腾达 AC10千兆路由器', 129.00, 17596, 57441); 203 INSERT INTO `commodity` VALUES (97, 16, '小米4C智能路由器', 69.00, 6216, 18457); 204 INSERT INTO `commodity` VALUES (98, 16, '水星D196 1900M无线路由器', 135.00, 48125, 58458); 205 INSERT INTO `commodity` VALUES (99, 16, '荣耀路由器双千兆', 329.00, 3974, 28485); 206 INSERT INTO `commodity` VALUES (100, 16, '华为路由器', 139.00, 4771, 14784); 207 INSERT INTO `commodity` VALUES (101, 16, '华为路由器', 139.00, 4771, 14784); 208 INSERT INTO `commodity` VALUES (102, 1, '小米8青春版', 1039.00, 1802, 224); 209 INSERT INTO `commodity` VALUES (103, 1, '小米8手机屏幕指纹版', 1499.00, 1988, 166); 210 INSERT INTO `commodity` VALUES (104, 1, '小米9se', 1749.00, 1007, 667); 211 INSERT INTO `commodity` VALUES (105, 1, '苹果 xsmax', 9888.00, 9997, 4000); 212 INSERT INTO `commodity` VALUES (106, 1, '苹果 xs', 8888.00, 9856, 3410); 213 214 -- ---------------------------- 215 -- Table structure for record 216 -- ---------------------------- 217 DROP TABLE IF EXISTS `record`; 218 CREATE TABLE `record` ( 219 `userId` int(11) NOT NULL COMMENT '用户id', 220 `r_id` int(11) NOT NULL COMMENT '记录用户操作类型编号', 221 `r_name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '记录用户操作类型名称', 222 `time` datetime(0) NOT NULL ON UPDATE CURRENT_TIMESTAMP(0) COMMENT '记录用户操作类型时间', 223 `c_id` int(11) NOT NULL COMMENT '商品id' 224 ) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic; 225 226 -- ---------------------------- 227 -- Table structure for seller 228 -- ---------------------------- 229 DROP TABLE IF EXISTS `seller`; 230 CREATE TABLE `seller` ( 231 `seller_id` int(10) NOT NULL AUTO_INCREMENT COMMENT '卖家编号', 232 `seller_name` varchar(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '卖家姓名', 233 `seller_address` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '卖家地址', 234 `seller_password` varchar(16) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '卖家密码', 235 `seller_balance` decimal(65, 2) UNSIGNED NOT NULL COMMENT '卖家余额', 236 `seller_phone` varchar(11) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '卖家电话号码', 237 PRIMARY KEY (`seller_id`) USING BTREE 238 ) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic; 239 240 -- ---------------------------- 241 -- Records of seller 242 -- ---------------------------- 243 INSERT INTO `seller` VALUES (1, 'akb48', '黄泉路52号', '123456', 10355.00, '13444444444'); 244 245 -- ---------------------------- 246 -- Table structure for states 247 -- ---------------------------- 248 DROP TABLE IF EXISTS `states`; 249 CREATE TABLE `states` ( 250 `userId` int(11) NOT NULL DEFAULT 0 COMMENT '用户id', 251 `c_id` int(11) NOT NULL DEFAULT 0 COMMENT '商品id', 252 `states_id` int(11) NOT NULL DEFAULT 0 COMMENT '状态id', 253 `evaluation` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '已上架' COMMENT '商品评价', 254 INDEX `fk_user_commodity`(`userId`) USING BTREE 255 ) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic; 256 257 -- ---------------------------- 258 -- Table structure for user 259 -- ---------------------------- 260 DROP TABLE IF EXISTS `user`; 261 CREATE TABLE `user` ( 262 `userId` int(11) NOT NULL AUTO_INCREMENT COMMENT '用户ID', 263 `userName` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '用户名', 264 `password` varchar(15) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '123456' COMMENT '密码', 265 `user_balance` double(50, 2) UNSIGNED NOT NULL DEFAULT 0.00 COMMENT '余额', 266 `integrate` double(50, 2) UNSIGNED NOT NULL DEFAULT 100.00 COMMENT '积分', 267 `address` varchar(50) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '未填写' COMMENT '地址', 268 `email` varchar(30) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL DEFAULT '未添加' COMMENT '邮箱++做密保', 269 `sex` int(1) NOT NULL DEFAULT 0 COMMENT '0表示男，1表示女', 270 `user_phone` varchar(11) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '买家电话号码', 271 PRIMARY KEY (`userId`) USING BTREE, 272 UNIQUE INDEX `userName`(`userName`) USING BTREE, 273 UNIQUE INDEX `email`(`email`) USING BTREE 274 ) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic; 275 276 -- ---------------------------- 277 -- Records of user 278 -- ---------------------------- 279 INSERT INTO `user` VALUES (1, 'agdgdfg', '123456', 4545.00, 100.00, '未填写', '未添加', 0, ''); 280 281 SET FOREIGN_KEY_CHECKS = 1;
1 package com.shop.impl;
2
3 import com.shop.util.ConfigManager;
4 import com.shop.util.Get;
5
6 import java.sql.*;
7
8 import com.shop.pojo.States;
9
10 public class BaseDao {
11 PreparedStatement ps = null;
12 ResultSet rs = null;
13 Connection conn = null;
14 private final String driver = ConfigManager.getInstance().getString("jdbc.driver");
15 private final String url = ConfigManager.getInstance().getString("jdbc.url");
16 private final String user = ConfigManager.getInstance().getString("jdbc.userName");
17 private final String password = ConfigManager.getInstance().getString("jdbc.password");
18
19 /**
20 * 获取数据库连接
21 */
22 public Connection getConn() {
23 try {
24 Class.forName(driver);
25 conn = DriverManager.getConnection(url, user, password);
26 // System.out.println(conn);
27 } catch (ClassNotFoundException e) {
28 e.printStackTrace();
29 } catch (SQLException e) {
30 e.printStackTrace();
31 }
32 return conn;
33 }
34
35 /**
36 * 查询方法
37 *
38 * @param sql
39 * @param obj
40 * @return
41 */
42 public ResultSet executeQuery(String sql, Object... obj) {
43 getConn();
44 try {
45 ps = conn.prepareStatement(sql);
46 if (obj != null) {
47 for (int i = 0; i < obj.length; i++) {
48 ps.setObject((i + 1), obj[i]);
49 }
50 }
51 rs = ps.executeQuery();
52 } catch (SQLException e) {
53 e.printStackTrace();
54 }
55 return rs;
56
57 }
58
59 /**
60 * 更新方法
61 *
62 * @param sql
63 * @param obj
64 * @return
65 */
66 public int executeUpdate(String sql, Object... obj) {
67 getConn();
68 int result = 0;
69 try {
70 ps = conn.prepareStatement(sql);
71 if (obj != null) {
72 for (int i = 0; i < obj.length; i++) {
73 ps.setObject((i + 1), obj[i]);
74 }
75 try{result = ps.executeUpdate();}catch (Exception e){
76 System.out.println("操作失误！");
77 }
78 }
79 } catch (SQLIntegrityConstraintViolationException e) {
80
81 } catch (SQLException e) {
82 e.printStackTrace();
83 } finally {
84 closeAll();
85 }
86 return result;
87 }
88
89 /**
90 * 释放资源
91 */
92 public void closeAll() {
93 try {
94 if (rs != null) {
95 rs.close();
96 }
97 if (ps != null) {
98 ps.close();
99 }
100 if (conn != null) {
101 conn.close();
102 }
103 } catch (SQLException e) {
104 e.printStackTrace();
105 }
106 }
107
108 }
1 package com.shop.util;
2
3 import com.shop.impl.ActivityDaoImpl;
4
5 import java.text.ParseException;
6 import java.text.SimpleDateFormat;
7 import java.util.*;
8
9 /**
10 * @auther:：9527
11 * @Description: 活动，根据日期判定是否在购买时进行优惠
12 * @program: jdbc_demo
13 * @create: 2019-08-30 08:50
14 */
15 public class Discount {
16
17 /**
18 * @param nowTime 当前时间
19 * @param beginTime 开始时间
20 * @param endTime 结束时间
21 * @return 如果当前时间在开始时间和结束时间之内就返回true，否则返回false
22 * @author 周小龙 19-8-30
23 */
24 public static boolean isActivity(Date nowTime, Date beginTime, Date endTime) {
25 Calendar date = Calendar.getInstance();
26 date.setTime(nowTime);
27 Calendar begin = Calendar.getInstance();
28 begin.setTime(beginTime);
29 Calendar end = Calendar.getInstance();
30 end.setTime(endTime);
31 if (date.after(begin) && date.before(end)) {
32 return true;
33 } else if (nowTime.compareTo(beginTime) == 0 || nowTime.compareTo(endTime) == 0) {
34 return true;
35 } else {
36 return false;
37 }
38 }
39
40 /**
41 * @param str 按格式输入时间
42 * @return 根据String返回时间
43 */
44 public static Date strToDate(String str) {
45 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
46 Date date = null;
47 try {
48 date = sdf.parse(str);
49 } catch (ParseException e) {
50 }
51 return date;
52 }
53
54
55 /**
56 * @param map 传递活动名称，开始时间，结束时间，和折扣的map
57 * @return 返回折扣系数
58 */
59 public static double isDiscount(Map<String, Map<Map<String, String>, Double>> map) {
60 double discount = 1.0;
61
62 for (Map.Entry<String, Map<Map<String, String>, Double>> waiCeng : map.entrySet()) {
63 for (Map.Entry<Map<String, String>, Double> zhongCeng : waiCeng.getValue().entrySet()) {
64 for (Map.Entry<String, String> neiCeng : zhongCeng.getKey().entrySet()) {
65 if (isActivity(new Date(), strToDate(neiCeng.getKey()), strToDate(neiCeng.getValue()))) {
66 for (Map.Entry<String, Map<Map<String, String>, Double>> waiCeng1 : map.entrySet()) {
67 for (Map.Entry<Map<String, String>, Double> zhongCeng1 : waiCeng1.getValue().entrySet()) {
68 discount = zhongCeng1.getValue();
69 }
70 }
71 }
72 }
73 }
74 }
75 return discount;
76 }
77
78
79 //测试
80 public static void main(String[] args) {
81 ActivityDaoImpl activityDao = new ActivityDaoImpl();
82 Map<String, Map<Map<String, String>, Double>> map = activityDao.findAll();
83 double di = isDiscount(map);
84 System.out.println(di);
85 }
86 }
1 package com.shop.impl;
2
3 import com.shop.dao.ActivityDao;
4 import com.shop.pojo.Activity;
5
6 import java.sql.SQLException;
7 import java.util.*;
8
9 /**
10 * @auther:：9527
11 * @Description: 活动实现类
12 * @program: jdbc_demo
13 * @create: 2019-08-30 10:37
14 */
15 public class ActivityDaoImpl extends BaseDao implements ActivityDao {
16 /**
17 * @param activityName
18 * @return
19 * @author 周小龙
20 */
21 @Override
22 public Activity findByName(String activityName) {
23 return null;
24 }
25
26 /**
27 * @param
28 * @return
29 * @author 周小龙
30 */
31 @Override
32 public Map<String, Map<Map<String, String>, Double>> findAll() {
33 Map<String, Map<Map<String, String>, Double>> mapOut = null;
34 Map<Map<String, String>, Double> mapMid = new HashMap<>();
35 Map<String, String> mapIn = new HashMap<>();
36
37 com.shop.pojo.Activity activity = null;
38 String sql = "SELECT * from activity";
39 Object[] obj = {};
40 rs = this.executeQuery(sql, obj);
41 try {
42 while (rs.next()) {
43 mapOut = new HashMap<>();
44 mapMid = new HashMap<>();
45 mapIn = new HashMap<>();
46 activity = new com.shop.pojo.Activity();
47 activity.setActivityId(rs.getInt("activityId"));
48 activity.setActivityName(rs.getString("activityName"));
49 activity.setBegin(rs.getString("begin"));
50 activity.setFinish(rs.getString("finish"));
51 activity.setDiscount(rs.getDouble("discount"));
52 //传递活动名称，开始时间，结束时间，和折扣
53 String name = activity.getActivityName();
54 String begin = activity.getBegin();
55 String finish = activity.getFinish();
56 double discount = activity.getDiscount();
57 mapIn.put(begin, finish);
58 mapMid.put(mapIn, discount);
59 mapOut.put(name, mapMid);
60 }
61
62
63 } catch (SQLException e) {
64 e.printStackTrace();
65 }
66 return mapOut;
67 }
68
69
70
71 public static void main(String[] args) {
72 ActivityDaoImpl activityDao = new ActivityDaoImpl();
73
74 }
75 }
1 package com.shop.dao;
2
3 import com.shop.pojo.Activity;
4
5 import java.util.Map;
6
7 /**
8 * @auther:：9527
9 * @Description: 活动接口
10 * @program: jdbc_demo
11 * @create: 2019-08-30 10:37
12 */
13 public interface ActivityDao {
14 /**
15 * @author 周小龙
16 * @param activityName
17 * @return
18 */
19 Activity findByName(String activityName);
20
21 /**
22 *
23 * @param
24 * @return
25 */
26 Map<String, Map<Map<String, String>, Double>> findAll();
27
28 }
|--关键代码：
1 /**
2 * @param str 按格式输入时间
3 * @return 根据String返回时间
4 */
5 public static Date strToDate(String str) {
6 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
7 Date date = null;
8 try {
9 date = sdf.parse(str);
10 } catch (ParseException e) {
11 }
12 return date;
13 }
14
15 /**
16 * @param nowTime 当前时间
17 * @param beginTime 开始时间
18 * @param endTime 结束时间
19 * @return 如果当前时间在开始时间和结束时间之内就返回true，否则返回false
20 * @author 周小龙 19-8-30
21 */
22 public static boolean isActivity(Date nowTime, Date beginTime, Date endTime) {
23 Calendar date = Calendar.getInstance();
24 date.setTime(nowTime);
25 Calendar begin = Calendar.getInstance();
26 begin.setTime(beginTime);
27 Calendar end = Calendar.getInstance();
28 end.setTime(endTime);
29 if (date.after(begin) && date.before(end)) {
30 return true;
31 } else if (nowTime.compareTo(beginTime) == 0 || nowTime.compareTo(endTime) == 0) {
32 return true;
33 } else {
34 return false;
35 }
36 }