Add favorite module with simple listing endpoint

Author: zjncs

TjuFood/src/main/java/xyz/tjucomments/tjufood/controller/FavoriteController.java

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+package xyz.tjucomments.tjufood.controller;
+
+import jakarta.annotation.Resource;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import xyz.tjucomments.tjufood.entity.Favorite;
+import xyz.tjucomments.tjufood.entity.RestBean;
+import xyz.tjucomments.tjufood.service.FavoriteService;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/favorite")
+public class FavoriteController {
+
+    @Resource
+    FavoriteService service;
+
+    @GetMapping("/user/{userId}")
+    public RestBean<List<Favorite>> listByUser(@PathVariable long userId) {
+        return RestBean.success(service.listByUser(userId));
+    }
+}

TjuFood/src/main/java/xyz/tjucomments/tjufood/entity/Favorite.java

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+package xyz.tjucomments.tjufood.entity;
+
+import lombok.Data;
+
+import java.time.LocalDateTime;
+
+@Data
+public class Favorite {
+    private Long id;
+    private Long userId;
+    private Long favoriteId;
+    private Integer type;
+    private LocalDateTime createTime;
+}

TjuFood/src/main/java/xyz/tjucomments/tjufood/mapper/FavoriteMapper.java

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+package xyz.tjucomments.tjufood.mapper;
+
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Select;
+import xyz.tjucomments.tjufood.entity.Favorite;
+
+import java.util.List;
+
+@Mapper
+public interface FavoriteMapper {
+    @Select("select * from tb_favorite where user_id = #{userId}")
+    List<Favorite> findByUser(long userId);
+}

TjuFood/src/main/java/xyz/tjucomments/tjufood/service/FavoriteService.java

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+package xyz.tjucomments.tjufood.service;
+
+import xyz.tjucomments.tjufood.entity.Favorite;
+
+import java.util.List;
+
+public interface FavoriteService {
+    List<Favorite> listByUser(long userId);
+}

TjuFood/src/main/java/xyz/tjucomments/tjufood/service/impl/FavoriteServiceImpl.java

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+package xyz.tjucomments.tjufood.service.impl;
+
+import jakarta.annotation.Resource;
+import org.springframework.stereotype.Service;
+import xyz.tjucomments.tjufood.entity.Favorite;
+import xyz.tjucomments.tjufood.mapper.FavoriteMapper;
+import xyz.tjucomments.tjufood.service.FavoriteService;
+
+import java.util.List;
+
+@Service
+public class FavoriteServiceImpl implements FavoriteService {
+
+    @Resource
+    FavoriteMapper mapper;
+
+    @Override
+    public List<Favorite> listByUser(long userId) {
+        return mapper.findByUser(userId);
+    }
+}