011 springboot整合mybatis-plus 首页加载热商品food评分前8的食物

文章目录

    • ConfigRegistCenter.java
    • MybatisplusConfig.java
    • RedisConfig.java
    • FoodController.java
    • Food.java
    • JwtInterceptor.java
    • FoodMapper.java
    • IFoodService.java
    • FoodServiceImpl.java
    • JwtUtil.java
    • ServerResult.java
    • ServletInitializer.java
    • SpringbootLoginApplication.java
    • food.sql
    • FoodMapper.xml
    • application.yaml
    • css_04_首页.css
    • index.html
    • pom.xml

ConfigRegistCenter.java


package com.example.config;import com.example.interceptor.JwtInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.*;@Configuration //将当前类注入到Spring容器中
@EnableWebMvc
public class ConfigRegistCenter implements WebMvcConfigurer {//注册拦截器public void addInterceptors(InterceptorRegistry registry){// "/" 项目根目录（http://localhost:80/app）registry.addInterceptor(new JwtInterceptor()).addPathPatterns("/**") //所有资源，包括静态资源.excludePathPatterns("/static/**").excludePathPatterns("/customer/login").excludePathPatterns("/food/hot").excludePathPatterns("/error");}// 静态资源配置@Overridepublic void addResourceHandlers(ResourceHandlerRegistry registry) {registry.addResourceHandler("/static/**").addResourceLocations("/","classpath:webapp/");WebMvcConfigurer.super.addResourceHandlers(registry);}}

MybatisplusConfig.java


package com.example.config;import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;@Configuration //当前是类配置类 @Component
public class MybatisplusConfig {@Beanpublic MybatisPlusInterceptor mybatisPlusInterceptor(){MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();PaginationInnerInterceptor paginationInnerInterceptor = new PaginationInnerInterceptor();paginationInnerInterceptor.setDbType(DbType.MYSQL);paginationInnerInterceptor.setOverflow(true);interceptor.addInnerInterceptor(paginationInnerInterceptor);return interceptor;}}

RedisConfig.java


package com.example.config;import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.listener.RedisMessageListenerContainer;
import org.springframework.data.redis.serializer.*;import java.time.Duration;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;/*** 配置redistemplate序列化*/
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport {//过期时间-1天private Duration timeToLive = Duration.ofDays(-1);/*** RedisTemplate 先关配置** @param factory* @return*/@Bean@SuppressWarnings("all")public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {RedisTemplate<String, Object> template = new RedisTemplate<String, Object>();template.setConnectionFactory(factory);Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);ObjectMapper om = new ObjectMapper();om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);//LocalDatetime序列化JavaTimeModule timeModule = new JavaTimeModule();timeModule.addDeserializer(LocalDate.class,new LocalDateDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));timeModule.addDeserializer(LocalDateTime.class,new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));timeModule.addSerializer(LocalDate.class,new LocalDateSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));timeModule.addSerializer(LocalDateTime.class,new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));om.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);om.registerModule(timeModule);jackson2JsonRedisSerializer.setObjectMapper(om);StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();// key采用String的序列化方式template.setKeySerializer(stringRedisSerializer);// hash的key也采用String的序列化方式template.setHashKeySerializer(stringRedisSerializer);// value序列化方式采用jacksontemplate.setValueSerializer(jackson2JsonRedisSerializer);// hash的value序列化方式采用jacksontemplate.setHashValueSerializer(jackson2JsonRedisSerializer);template.afterPropertiesSet();return template;}@Beanpublic RedisCacheManager cacheManager(RedisConnectionFactory connectionFactory) {//默认1RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig().entryTtl(timeToLive).serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(keySerializer())).serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(valueSerializer())).disableCachingNullValues();RedisCacheManager redisCacheManager = RedisCacheManager.builder(connectionFactory).cacheDefaults(config).transactionAware().build();return redisCacheManager;}@BeanRedisMessageListenerContainer listenerContainer(RedisConnectionFactory connectionFactory) {RedisMessageListenerContainer listenerContainer = new RedisMessageListenerContainer();listenerContainer.setConnectionFactory(connectionFactory);return listenerContainer;}/*** key 类型* @return*/private RedisSerializer<String> keySerializer() {return  new StringRedisSerializer();}/*** 值采用JSON序列化* @return*/private RedisSerializer<Object> valueSerializer() {return new GenericJackson2JsonRedisSerializer();}}

FoodController.java


package com.example.controller;import com.example.entity.Food;
import com.example.service.IFoodService;
import com.example.util.ServerResult;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RestController;import javax.servlet.http.HttpServletRequest;
import java.util.List;/*** <p>*  前端控制器* </p>** @author dd* @since 2024-04-20*/
@RestController
@RequestMapping("/food")
public class FoodController {@Autowiredprivate IFoodService foodService;@GetMapping("hot")public ServerResult getHotProducts(HttpServletRequest request){List<Food> list = foodService.getHotFood();if(list != null && list.size()>0){ServerResult result = ServerResult.getSuccess(list);return result;}//list.get(0).getFoodMainImg();return ServerResult.getFail(null);}}

Food.java


package com.example.entity;import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import java.io.Serializable;
import java.math.BigDecimal;
import java.time.LocalDateTime;/*** <p>* * </p>** @author dd* @since 2024-04-20*/
public class Food implements Serializable {private static final long serialVersionUID = 1L;/*** 美食id*/@TableId(value = "food_id", type = IdType.AUTO)private Integer foodId;/*** 美食名*/private String foodName;/*** 美食价格*/private BigDecimal foodPrice;/*** 美食评分*/private Float foodScore;/*** 美食详情*/private String foodDetail;/*** 美食类型*/private String foodType;/*** 美食图片*/private String foodMainImg;/*** 美食推荐状态*/private Integer foodRecommendStatus;/*** 创建时间*/private LocalDateTime foodCteateTime;/*** 更新时间*/private LocalDateTime foodUpdateTime;private String other1;private String other2;public Integer getFoodId() {return foodId;}public void setFoodId(Integer foodId) {this.foodId = foodId;}public String getFoodName() {return foodName;}public void setFoodName(String foodName) {this.foodName = foodName;}public BigDecimal getFoodPrice() {return foodPrice;}public void setFoodPrice(BigDecimal foodPrice) {this.foodPrice = foodPrice;}public Float getFoodScore() {return foodScore;}public void setFoodScore(Float foodScore) {this.foodScore = foodScore;}public String getFoodDetail() {return foodDetail;}public void setFoodDetail(String foodDetail) {this.foodDetail = foodDetail;}public String getFoodType() {return foodType;}public void setFoodType(String foodType) {this.foodType = foodType;}public String getFoodMainImg() {return foodMainImg;}public void setFoodMainImg(String foodMainImg) {this.foodMainImg = foodMainImg;}public Integer getFoodRecommendStatus() {return foodRecommendStatus;}public void setFoodRecommendStatus(Integer foodRecommendStatus) {this.foodRecommendStatus = foodRecommendStatus;}public LocalDateTime getFoodCteateTime() {return foodCteateTime;}public void setFoodCteateTime(LocalDateTime foodCteateTime) {this.foodCteateTime = foodCteateTime;}public LocalDateTime getFoodUpdateTime() {return foodUpdateTime;}public void setFoodUpdateTime(LocalDateTime foodUpdateTime) {this.foodUpdateTime = foodUpdateTime;}public String getOther1() {return other1;}public void setOther1(String other1) {this.other1 = other1;}public String getOther2() {return other2;}public void setOther2(String other2) {this.other2 = other2;}@Overridepublic String toString() {return "Food{" +"foodId=" + foodId +", foodName=" + foodName +", foodPrice=" + foodPrice +", foodScore=" + foodScore +", foodDetail=" + foodDetail +", foodType=" + foodType +", foodMainImg=" + foodMainImg +", foodRecommendStatus=" + foodRecommendStatus +", foodCteateTime=" + foodCteateTime +", foodUpdateTime=" + foodUpdateTime +", other1=" + other1 +", other2=" + other2 +"}";}
}

JwtInterceptor.java


package com.example.interceptor;import com.example.util.JwtUtil;
import org.springframework.web.servlet.HandlerInterceptor;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;/*** 登录检查拦截器* 被拦截下来的URL:* 1.获得token* 2.check token*/
public class JwtInterceptor implements HandlerInterceptor {//在访问前拦截@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {System.out.println("登录检查拦截器正在拦截URL>>>"+request.getRequestURI());//跨域请求会首先发一个option请求,直接返回正常状态并放行//if(request.getMethod().equals("OPTION"))//return true;//1.获得tokenString token = request.getHeader("token");if(token == null || token.equals("")){System.out.println("登录检查拦截器正在拦截,没有获得到token");//跳转到登录页面response.sendRedirect(request.getContextPath()+"/static/login.html");return false;}else {//2.check tokenSystem.out.println("登录检查拦截器正在拦截,获得到的token:"+token);if (JwtUtil.checkToken(token)){//有效tokenreturn true;}else {System.out.println("被拦截了，无效token");return false;}}//        if(token != null){
//            if(JwtUtil.checkToken(token))
//                return true;//token有效
//        }
//        return false;}}

FoodMapper.java


package com.example.mapper;import com.example.entity.Food;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;/*** <p>*  Mapper 接口* </p>** @author dd* @since 2024-04-20*/
public interface FoodMapper extends BaseMapper<Food> {}

IFoodService.java


package com.example.service;import com.example.entity.Food;
import com.baomidou.mybatisplus.extension.service.IService;import java.util.List;/*** <p>*  服务类* </p>** @author dd* @since 2024-04-20*/
public interface IFoodService extends IService<Food> {//评分排名前8的食物public List<Food> getHotFood();}

FoodServiceImpl.java


package com.example.service.impl;import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.example.entity.Food;
import com.example.mapper.FoodMapper;
import com.example.service.IFoodService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.ListOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;import java.util.List;
import java.util.concurrent.TimeUnit;/*** <p>*  服务实现类* </p>** @author dd* @since 2024-04-20*/
@Service
public class FoodServiceImpl extends ServiceImpl<FoodMapper, Food> implements IFoodService {@Autowiredprivate FoodMapper foodMapper;@Autowiredprivate RedisTemplate redisTemplate;@Overridepublic List<Food> getHotFood(){ListOperations<String,Food> operations =  redisTemplate.opsForList();// hotFood(K) - (V)String key = "hotFood";if (redisTemplate.hasKey(key)){//直接从缓存中返回List<Food> hotFoodList = operations.range(key,0,7);return hotFoodList;}else{//从数据库查询一份，放到Redis缓存中QueryWrapper<Food> queryWrapper = new QueryWrapper<>();queryWrapper.orderByDesc("food_score");Page<Food> page = new Page<>(1,8);page = foodMapper.selectPage(page,queryWrapper);List<Food> hotProductList =  page.getRecords();operations.leftPushAll(key,hotProductList);redisTemplate.expire(key,30, TimeUnit.SECONDS);// 30s过期，过期后Redis中没有了，则需要重新到MySQL中获得最新的数据return hotProductList;}}}

JwtUtil.java


package com.example.util;import com.example.entity.LoginCustomer;
import io.jsonwebtoken.*;import java.util.Date;
import java.util.HashMap;
import java.util.Map;public class JwtUtil {private static final String jwtToken = "dahkgag7*$";private static long expireTime = 1000*60*60*24;/*** 创建新token* @param customerId 用户id* @param customerName* @return*/public static String createToken(Integer customerId,String customerName){Map<String,Object> claims = new HashMap<>();claims.put("customerId",customerId);claims.put("customerName",customerName);System.out.println("创建token"+customerId);System.out.println("创建token"+customerName);JwtBuilder jwtBuilder = Jwts.builder().signWith(SignatureAlgorithm.HS256,jwtToken)//签发算法(head部分),秘钥为jwtToken.setClaims(claims)//body数据,要唯一,自行设。payload部分数据 //1.(customerId,customerName)--token.setIssuedAt(new Date())//设置签发时间:保证每次生成的token不同.setExpiration(new Date(System.currentTimeMillis()+expireTime));//一天的有效时间String token = jwtBuilder.compact();return token;}//验证token是否有效/*** 验证token是否有效* @param token 客户端携带的token* @return 返回是否有效*///2.验证token是否过期public static boolean checkToken(String token){if(token != null && !token.equals("")){try {Jwt parse = Jwts.parser().setSigningKey(jwtToken).parseClaimsJws(token);return true;}catch (ExpiredJwtException e){System.out.println("token已经过期了");return false;} catch (Exception e) {System.out.println("无效的token");return false;}}elsereturn false;}/*** 解析token中的用户数据* @param token 客户端携带的token* @return 返回登录用户信息(customerIs)*/public static LoginCustomer parseToken(String token){if(token != null && !token.equals("")) {try {Jwt parse = Jwts.parser().setSigningKey(jwtToken).parseClaimsJws(token);Map<String,Object> map = (Map<String, Object>)parse.getBody();if(map != null){Integer custId = (Integer)map.get("customerId");//注意，此处的key 要与当初绑定进去的key一致String custName = (String)map.get("customerName");//注意，此处的key 要与当初绑定进去的key一致LoginCustomer loginCustomer = new LoginCustomer(custId,custName);System.out.println("获得到的登录用户的信息是:" + loginCustomer);return loginCustomer;}else{System.out.println("获得到的登录用户的信息失败");return null;}} catch (Exception e){e.printStackTrace();return null;}}elsereturn null;}}

ServerResult.java


package com.example.util;public class ServerResult {private int code;private String msg;private Object data;public static ServerResult getSuccess(Object data){return new ServerResult(200,"查询成功",data);}public static ServerResult getFail(Object data){return new ServerResult(201,"查询失败",data);}/*** 添加、删除、修改的成功* @param data* @return*/public static ServerResult updateSuccess(Object data){return new ServerResult(200,"处理成功",data);}/*** 添加、删除、修改的失败* @param data* @return*/public static ServerResult updateFail(Object data){return new ServerResult(201,"处理失败",data);}public static ServerResult loginSuccess(Object data){return new ServerResult(200,"登录成功",data);}public static ServerResult loginFail(Object data){return new ServerResult(201,"登录失败",data);}public ServerResult() {}public ServerResult(int code, String msg, Object data) {this.code = code;this.msg = msg;this.data = data;}public int getCode() {return code;}public void setCode(int code) {this.code = code;}public String getMsg() {return msg;}public void setMsg(String msg) {this.msg = msg;}public Object getData() {return data;}public void setData(Object data) {this.data = data;}@Overridepublic String toString() {return "ServerResult{" +"code=" + code +", msg='" + msg + '\'' +", data=" + data +'}';}
}

ServletInitializer.java


package com.example;import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;public class ServletInitializer extends SpringBootServletInitializer {@Overrideprotected SpringApplicationBuilder configure(SpringApplicationBuilder application) {return application.sources(SpringbootLoginApplication.class);}}

SpringbootLoginApplication.java


package com.example;import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;@SpringBootApplication
@MapperScan("com.example.mapper")
@EnableCaching
public class SpringbootLoginApplication {public static void main(String[] args) {SpringApplication.run(SpringbootLoginApplication.class, args);}}

food.sql


-- ----------------------------
-- Table structure for food
-- ----------------------------
DROP TABLE IF EXISTS `food`;
CREATE TABLE `food`  (`food_id` int(0) NOT NULL AUTO_INCREMENT COMMENT '美食id',`food_name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '美食名',`food_price` decimal(10, 1) NULL DEFAULT NULL COMMENT '美食价格',`food_score` float NULL DEFAULT NULL COMMENT '美食评分',`food_detail` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '美食详情',`food_type` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '美食类型',`food_main_img` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '美食图片',`food_recommend_status` int(0) NULL DEFAULT 0 COMMENT '美食推荐状态',`food_cteate_time` datetime(0) NULL DEFAULT NULL COMMENT '创建时间',`food_update_time` datetime(0) NULL DEFAULT NULL COMMENT '更新时间',`other1` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,`other2` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,PRIMARY KEY (`food_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 65 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;-- ----------------------------
-- Records of food
-- ----------------------------
INSERT INTO `food` VALUES (1, '奥尔良翅中', 56.5, 8.31, '翅中5个', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (2, '薄切猪梅花', 54.9, 6.64, '一斤', '烤肉', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (3, '金针菇', 39.4, 8.08, '金针菇', '烤肉', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (4, '私房炸小排', 44.3, 4.66, '油炸', '烤肉', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (5, '荞麦冷面', 59.1, 4.3, '荞麦', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (6, '五花肉', 41.6, 7.99, '五花肉', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (7, '雪花牛里脊', 59.9, 8.34, '牛里脊', '烤肉', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (8, '雪花香翁牛排', 87.1, 3.91, '新鲜牛排', '烤肉', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (9, '粉丝金针菇', 50.3, 8.59, '粉丝金针菇', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (10, '黑椒牛肉粒', 68.0, 3.63, '黑椒牛肉粒', '烤肉', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (11, '香辣鸡腿肉', 77.2, 5.53, '香辣鸡腿肉', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (12, '原切烧汁牛五花', 76.1, 4.07, '原切烧汁牛五花', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (13, '牛肋条', 66.7, 6.82, '牛肋条', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (14, '牛肉五花', 61.8, 5.49, '牛肉', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (15, '猪肉五花', 77.4, 7.32, '猪肉', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (16, '鱼豆腐', 84.7, 8.6, '鱼豆腐', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (17, '德州BBQ烤翅', 30.7, 8.75, '三件套', '汉堡', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (18, '黑松露菌菇和牛堡', 55.5, 8.26, '四件套', '汉堡', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (19, '美式卡真烤去骨鸡腿全餐', 85.2, 9.22, '单个', '汉堡', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (20, '招牌芝士和牛汉堡', 52.8, 7.53, '咖啡', '汉堡', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (21, '茴香小油条', 74.6, 7.9, '茴香小油条', '火锅', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (22, '内蒙草原羔羊', 69.9, 3.3, '羊肉', '火锅', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (23, '现炸小酥肉', 67.9, 8, '现炸', '火锅', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (24, '雪花牛肉', 57.6, 8.68, '牛肉', '火锅', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (25, '炸豆皮', 77.5, 3.76, '放学小肉', '火锅', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (26, '干贝咸蛋黄虾滑', 42.0, 5.41, '蛋黄虾滑', '火锅', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (27, '老哥酥肉', 77.5, 9.08, '酥肉', '火锅', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (28, '雪花牛肉', 64.3, 5.42, '毛肚', '火锅', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (29, '风花雪月', 83.2, 3.22, '风花雪月', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (30, '黑牛牡蛎肉', 78.6, 7.09, '黑牛牡蛎肉', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (31, '青海烤饼', 63.7, 8.19, '饼1个', '烤肉', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (32, '黑牛肋条', 61.4, 9.63, '黑牛肋条', '烤肉', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (33, '大片毛肚', 40.2, 9.92, '大片毛肚', '火锅', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (34, '灯影鱼片', 62.6, 6.72, '鱼片', '火锅', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (35, '飞鱼籽虾滑', 66.7, 9.8, '虾滑', '火锅', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (36, '牛舌', 78.9, 3.46, '牛舌', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (37, '迷你汉堡', 53.8, 5.42, '会员专享', '汉堡', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (38, '蘑菇味狠浓牛肉汉堡', 71.8, 6.35, '单人餐', '汉堡', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (39, '四重芝士狠浓牛肉汉堡', 51.6, 3.37, '单人下午茶', '汉堡', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (40, 'M8澳洲和牛', 64.1, 8.5, '澳洲和牛', '火锅', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (41, 'M5牛肉', 81.0, 7.85, '牛肉', '火锅', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (42, '海鲜拼盘', 59.0, 8.94, '海鲜拼盘', '火锅', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (43, '鱼籽鲜虾滑', 40.5, 4.57, '虾滑', '火锅', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (44, '加州汉堡套餐', 43.1, 4.37, '兑换券', '汉堡', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (45, '双层美式汉堡', 88.9, 8.74, '兑换券', '汉堡', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (46, '招牌安格斯牛肉汉堡单人餐', 35.0, 6.97, '兑换券', '汉堡', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (47, '孜然鸡肉条', 82.6, 5.25, '兑换券', '汉堡', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (48, '上等黑虎虾', 56.7, 9.95, '虾', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (49, '上等牛五花', 85.7, 6.99, '牛五花', '烤肉', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (50, '土豆泥', 50.5, 5.52, '土豆泥', '烤肉', '', 1, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (52, '现切冰鲜牛排', 53.4, 4, '现切冰鲜牛排', '烤肉', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (53, '超传统超级棒约翰', 43.0, 5.33, '超传统超级棒约翰', '汉堡', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (54, '榴莲芝士条', 54.3, 7.11, '榴莲芝士条', '汉堡', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (55, '洋葱圈', 55.0, 8.2, '洋葱圈', '汉堡', '', 0, NULL, NULL, NULL, NULL);
INSERT INTO `food` VALUES (56, '意式红烩牛肉焗饭', 40.0, 5.44, '意式红烩牛肉焗饭', '汉堡', '', 0, NULL, NULL, NULL, NULL);

FoodMapper.xml


<?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">
<mapper namespace="com.example.mapper.FoodMapper"></mapper>

application.yaml


server:servlet:context-path: /appport: 80spring:datasource:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://localhost:3306/dicts?useSSL=true&useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghaiusername: rootpassword: 123456redis:host: localhostport: 6379database: 0connect-timeout: 1800000mvc:view:prefix: / #前缀suffix: .jsp #后缀hiddenmethod:filter:enabled: true # 支持表单 method 转换logging:file:path: d://logger #日志记录level:com.example: debug

css_04_首页.css


*{margin: 0;padding: 0;
}
/* =======================头部======================= */
.header{width: 85%;   /*  %: 父元素（父标签的百分比）*/height: 58px;/* background-color: aquamarine; */min-width: 1000px;margin: 0 auto;  /*容器水平居中*/
}/* =======================logo部分 =======================*/
.header .logo{width: 15%;height: 33px;/* background-color: #fa8072; */float: left;   /*不换行*/margin-top: 12px;  /*距离顶部间距*/
}.header .logo a{  /*行内元素不能设置宽高度，转换成 inline-block / block*/display: inline-block;width: 100%;height: 33px;background: url(../images/header-small-sprites3.png) no-repeat 0 -25px;background-size: 125px;
}/*======================= 导航部分 =======================*/
.header .nav{width: 35%;height: 100%;/* background-color: skyblue; */float: left;min-width: 450px;
}/* 1.设置UL 宽高度 ： 100%
2.小黑点去掉UL
3.Li 不换行 ： float :left 
4.设置每个li 宽高度
5.A 超链接宽高度 = li 宽高度
6.设置a超链接文字的大小，居中，下划线
7.鼠标悬浮样式修改 a:hover */.nav .head-nav{width: 100%;height: 100%;/* background-color: burlywood; */list-style: none;  /*小黑点去掉UL*/
}.head-nav li{float: left;  /*不换行 */height: 100%;width: 80px;/* border-right: 1px dotted white;  solid : 实线 , dashed: 虚线 , dotted : 圆点*/
}.head-nav li a{display: inline-block;width: 100%;height: 100%;color: rgb(78, 78, 78);text-decoration: none; /*超链接下划线去除*/font-size: 13px;text-align: center;line-height: 58px;
}
.head-nav li a:hover{  /*鼠标悬浮样式修改 */background-color: rgba(230, 69, 102, 0.1);color: rgb(78, 78, 78);border-bottom: 3px solid rgba(230, 69, 102, 0.1)
}.head-nav .first-item{  /*第一个li ,首页*/background-color: rgba(230, 69, 102, 0.1);color: rgb(78, 78, 78);
}
.head-nav .first-item:hover{ /*第一个li ,首页，鼠标悬浮不变*/background-color: rgba(230, 69, 102, 0.1);color: rgb(78, 78, 78);border-bottom:none;
}/* =====================搜索区域=========================== */
.search{width: 25%;height: 100%;/* background-color: yellow;  */float: left;min-width: 260px;
}.search form{width: 100%;height: 30px;/* background-color: aqua; */margin-top: 12px;}
/* 搜索框 */
.search form .search-kw{width: 180px;height: 100%;border: 1px solid rgba(230, 69, 102, 0.1);border-radius: 4px;outline: none; /*点击输入框的内边框 取消*/padding-left: 10px;/*内部的文字 左间距 ： 左内间距*/color:  rgb(108, 108, 108);
}/* 搜索按钮 */
.search .search-btn{width: 60px;height: 30px;background-color: rgba(230, 69, 102, 0.1);font-size: 12px;color: rgb(78, 78, 78);border: none;cursor: pointer ;  /*鼠标悬浮上去 是小手链接形状*/border-radius: 4px;
}/*======================= 登录区域======================= */
.header  .login{width: 13%;height: 100%;/* background-color: yellow; */float: right;
}.login a{display: inline-block;width: 60px;height: 30px;background-color: rgba(230, 69, 102, 0.1);margin-top: 14px;  /*上间距*/border-radius: 4px;  /*圆角*/text-decoration: none;color: rgb(78, 78, 78);font-size: 12px;text-align: center;line-height: 30px;
}.login a:hover{  /*:hover  鼠标悬浮*//* background-color:white;color: rgba(230, 69, 102, 0.1); *//* border: 1px solid rgba(230, 69, 102, 0.1); */font-weight: bold;
}/* ==========================banner======================== */
.banner{width: 100%;height: 400px;/* background-color: salmon; */
}.banner img{width: 100%;height: 100%;
}/*    =======================  热门商品==================  */
.pro-title{width: 100%;height: 80px;/* background-color: salmon; */text-align: center;line-height: 80px;font-size: 28px;
}
/* 商品列表 */
.pro-list{width: 85%;height: 660px;/* background-color: skyblue;  */margin:  0 auto; /* 容器居中 */
}.pro-list ul{width: 100%;height:  100%;list-style: none;
}.pro-list ul li{width: 230px;height: 320px;/* border: 3px solid salmon; */float: left;  /* 不换行 */margin-right: 30px;margin-bottom: 10px;}.pro-list ul li img{width: 160px;height: 160px;/* background-color: sandybrown; */
}.pro-list ul  .pro-name{width: 190px;height: 48px;/* background-color: chartreuse; */margin-left: 20px;font-size: 13px;color: darkgrey;text-align: center;
}
.pro-name-a{text-decoration: none;
}
.pro-list ul  .pro-price{width: 190px;height: 18px;/* background-color: antiquewhite; */margin-left: 20px;margin-top: 10px;text-align: center;color: rgba(230, 69, 101, 0.591);}.pro-price i{vertical-align: middle;font-size: 12px;font-weight: 700;font-family: MicrosoftYahei-regular,Arial,Helvetica,sans-serif;
}

index.html


<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>首页</title><link href="css/css_04_首页.css" rel="stylesheet"/><link rel="shortcut icon" href="images/favicon.ico" /><script src="js/jquery-3.7.0.min.js"></script></head>
<body>
<!-- ======================1. 头部 ======================-->
<div class="header"><div class="logo"><a href=""> </a></div><div class="nav"><ul class="head-nav"><li><a href="" class="first-item">首页</a></li><li><a href="">菜品</a></li><li><a href="">店铺</a></li><li><a href="">热卖</a></li><li><a href="">优惠券</a></li></ul></div><div class="search"><form><input type="text" class="search-kw" ><input type="submit" class="search-btn" value="搜索"/></form></div><div class="login"><a href="login.html">登录</a><a href="">注册</a></div>
</div><!-- ======================2. 横幅 banner ======================-->
<div class="banner"><img src="images/bg1.jpg" />
</div><!-- =======================3. 热门商品================== -->
<h3 class="pro-title"> 热门商品</h3>
<div class="pro-list"><ul><li><a href="css_06_商品详情.html"><img class="pro-img" src="images/pro2.webp" /></a><a href="" class="pro-name-a"><p  class="pro-name">HUAWEI Mate X5 典藏版 16GB+1TB 青山黛</p></a><div class="pro-price"><i>￥</i><span>6999.00</span></div></li><li><a href="css_06_商品详情.html"><img class="pro-img" src="images/pro3.webp" /></a><a href="" class="pro-name-a"><p  class="pro-name">HUAWEI Mate X5 典藏版 16GB+1TB 青山黛</p></a><div class="pro-price"><i>￥</i><span>6999.00</span></div></li><li><a href="css_06_商品详情.html"><img class="pro-img" src="images/pro2.webp" /></a><a href="" class="pro-name-a"><p  class="pro-name">HUAWEI Mate X5 典藏版 16GB+1TB 青山黛</p></a><div class="pro-price"><i>￥</i><span>6999.00</span></div></li><li><a href="css_06_商品详情.html"><img class="pro-img" src="images/pro3.webp" /></a><a href="" class="pro-name-a"><p  class="pro-name">HUAWEI Mate X5 典藏版 16GB+1TB 青山黛</p></a><div class="pro-price"><i>￥</i><span>6999.00</span></div></li><li><a href="css_06_商品详情.html"><img class="pro-img" src="images/pro2.webp" /></a><a href="" class="pro-name-a"><p  class="pro-name">HUAWEI Mate X5 典藏版 16GB+1TB 青山黛</p></a><div class="pro-price"><i>￥</i><span>6999.00</span></div></li><li><a href="css_06_商品详情.html"><img class="pro-img" src="images/pro3.webp" /></a><a href="" class="pro-name-a"><p  class="pro-name">HUAWEI Mate X5 典藏版 16GB+1TB 青山黛</p></a><div class="pro-price"><i>￥</i><span>6999.00</span></div></li><li><a href="css_06_商品详情.html"><img class="pro-img" src="images/pro2.webp" /></a><a href="" class="pro-name-a"><p  class="pro-name">HUAWEI Mate X5 典藏版 16GB+1TB 青山黛</p></a><div class="pro-price"><i>￥</i><span>6999.00</span></div></li><li><a href="css_06_商品详情.html"><img class="pro-img" src="images/pro3.webp" /></a><a href="" class="pro-name-a"><p  class="pro-name">HUAWEI Mate X5 典藏版 16GB+1TB 青山黛</p></a><div class="pro-price"><i>￥</i><span>6999.00</span></div></li></ul>
</div><script>function loadIndexInfo() {let token = localStorage.getItem("token");console.log(token);let url = "http://localhost:80/app/food/hot";document.addEventListener('DOMContentLoaded', function() {$.ajax({type: "get",url: url,//headers: {'token': token},success: function(result) {console.log(result);if (result.code == 200) {// 使用querySelectorAll来选择所有class为'pro-img'的元素var imgElements = document.querySelectorAll('.pro-img');console.log(imgElements.length);// 确保有足够的数据和图片元素var minLength = Math.min(result.data.length, imgElements.length);for (var i = 0; i < minLength && i < 8; i++) { // 只给前8个元素赋值imgElements[i].src = result.data[i].foodMainImg;console.log('Updated image element #' + (i + 1) + ' with URL: ' + result.data[i].foodMainImg);}// 如果数据不足8条或者图片元素不足8个，打印警告信息if (minLength < 8 || result.data.length < 8) {console.warn('Not enough data or image elements to assign to 8 images.');}} else {// 添加错误处理逻辑，例如：console.error('Request failed with code:', result.code);}}});});}// 调用函数加载信息loadIndexInfo();</script></body>
</html>

pom.xml


<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.7.6</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.example</groupId><artifactId>springboot_login</artifactId><version>0.0.1-SNAPSHOT</version><packaging>war</packaging><name>springboot_login</name><description>springboot_login</description><properties><java.version>1.8</java.version></properties><dependencies><!--引入redis依赖--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId></dependency><dependency><groupId>commons-codec</groupId><artifactId>commons-codec</artifactId><version>1.9</version></dependency><dependency><groupId>io.jsonwebtoken</groupId><artifactId>jjwt</artifactId><version>0.9.1</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><dependency><groupId>taglibs</groupId><artifactId>standard</artifactId><version>1.1.0</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-tomcat</artifactId><scope>provided</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.28</version></dependency><!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-boot-starter --><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.5.2</version></dependency><!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-generate --><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-generator</artifactId><version>3.5.1</version></dependency><dependency><groupId>org.freemarker</groupId><artifactId>freemarker</artifactId><version>2.3.31</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

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