springboot苍穹外卖实战：九、小程序微信登录代码开发+商品浏览

微信登录

application.yml和application-dev.yml

application-dev.yml

sky:wechat:appid: xxxsecret: xxx

application.yml

sky:wechat:appid: ${sky.wechat.appid}secret: ${sky.wechat.secret}

配置为微信用户生成jwt令牌时使用的配置项：

application.yml

sky:jwt:# 设置jwt签名加密时使用的秘钥admin-secret-key: itcast# 设置jwt过期时间admin-ttl: 7200000# 设置前端传递过来的令牌名称admin-token-name: tokenuser-secret-key: itheimauser-ttl: 7200000user-token-name: authentication

##DTO和VO设计
在sky-pojo模块，UserLoginDTO.java已定义
在sky-pojo模块，UserLoginVO.java已定义

controller层

创建UserController的login方法：

@RestController
@RequestMapping("/user/user")
@Api(tags = "C端用户相关接口")
@Slf4j
public class UserController {@Autowiredprivate UserService userService;@Autowiredprivate JwtProperties jwtProperties;/*** 微信登录* @param userLoginDTO* @return*/@PostMapping("/login")@ApiOperation("微信登录")public Result<UserLoginVO> login(@RequestBody UserLoginDTO userLoginDTO){log.info("微信用户登录：{}",userLoginDTO.getCode());//微信登录User user = userService.wxLogin(userLoginDTO);//后绪步骤实现//为微信用户生成jwt令牌Map<String, Object> claims = new HashMap<>();claims.put(JwtClaimsConstant.USER_ID,user.getId());String token = JwtUtil.createJWT(jwtProperties.getUserSecretKey(), jwtProperties.getUserTtl(), claims);UserLoginVO userLoginVO = UserLoginVO.builder().id(user.getId()).openid(user.getOpenid()).token(token).build();return Result.success(userLoginVO);}
}

Service和其实现类

public interface UserService {/*** 微信登录* @param userLoginDTO* @return*/User wxLogin(UserLoginDTO userLoginDTO);
}

@Service
@Slf4j
public class UserServiceImpl implements UserService {//微信服务接口地址public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";@Autowiredprivate WeChatProperties weChatProperties;@Autowiredprivate UserMapper userMapper;/*** 微信登录* @param userLoginDTO* @return*/public User wxLogin(UserLoginDTO userLoginDTO) {String openid = getOpenid(userLoginDTO.getCode());//判断openid是否为空，如果为空表示登录失败，抛出业务异常if(openid == null){throw new LoginFailedException(MessageConstant.LOGIN_FAILED);}//判断当前用户是否为新用户User user = userMapper.getByOpenid(openid);//如果是新用户，自动完成注册if(user == null){user = User.builder().openid(openid).createTime(LocalDateTime.now()).build();userMapper.insert(user);//后绪步骤实现}//返回这个用户对象return user;}/*** 调用微信接口服务，获取微信用户的openid* @param code* @return*/private String getOpenid(String code){//调用微信接口服务，获得当前微信用户的openidMap<String, String> map = new HashMap<>();map.put("appid",weChatProperties.getAppid());map.put("secret",weChatProperties.getSecret());map.put("js_code",code);map.put("grant_type","authorization_code");String json = HttpClientUtil.doGet(WX_LOGIN, map);JSONObject jsonObject = JSON.parseObject(json);String openid = jsonObject.getString("openid");return openid;}
}

mapper和其映射文件

@Mapper
public interface UserMapper {/*** 根据openid查询用户* @param openid* @return*/@Select("select * from user where openid = #{openid}")User getByOpenid(String openid);/*** 插入数据* @param user*/void insert(User user);
}

<?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.sky.mapper.UserMapper"><insert id="insert" useGeneratedKeys="true" keyProperty="id">insert into user (openid, name, phone, sex, id_number, avatar, create_time)values (#{openid}, #{name}, #{phone}, #{sex}, #{idNumber}, #{avatar}, #{createTime})</insert></mapper>

编写拦截器并注册

编写拦截器JwtTokenUserInterceptor：统一拦截用户端发送的请求并进行jwt校验

/*** jwt令牌校验的拦截器*/
@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {@Autowiredprivate JwtProperties jwtProperties;/*** 校验jwt** @param request* @param response* @param handler* @return* @throws Exception*/public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {//判断当前拦截到的是Controller的方法还是其他资源if (!(handler instanceof HandlerMethod)) {//当前拦截到的不是动态方法，直接放行return true;}//1、从请求头中获取令牌String token = request.getHeader(jwtProperties.getUserTokenName());//2、校验令牌try {log.info("jwt校验:{}", token);Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);Long userId = Long.valueOf(claims.get(JwtClaimsConstant.USER_ID).toString());log.info("当前用户的id：", userId);BaseContext.setCurrentId(userId);//3、通过，放行return true;} catch (Exception ex) {//4、不通过，响应401状态码response.setStatus(401);return false;}}
}

在WebMvcConfiguration配置类中注册拦截器：

	@Autowiredprivate JwtTokenUserInterceptor jwtTokenUserInterceptor;/*** 注册自定义拦截器* @param registry*/protected void addInterceptors(InterceptorRegistry registry) {log.info("开始注册自定义拦截器...");//.........registry.addInterceptor(jwtTokenUserInterceptor).addPathPatterns("/user/**").excludePathPatterns("/user/user/login").excludePathPatterns("/user/shop/status");}

商品浏览

Mapper层和其映射文件

在SetmealMapper.java中添加list和getDishItemBySetmealId两个方法

	/*** 动态条件查询套餐* @param setmeal* @return*/List<Setmeal> list(Setmeal setmeal);/*** 根据套餐id查询菜品选项* @param setmealId* @return*/@Select("select sd.name, sd.copies, d.image, d.description " +"from setmeal_dish sd left join dish d on sd.dish_id = d.id " +"where sd.setmeal_id = #{setmealId}")List<DishItemVO> getDishItemBySetmealId(Long setmealId);

创建SetmealMapper.xml文件

<?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.sky.mapper.SetmealMapper"><select id="list" parameterType="Setmeal" resultType="Setmeal">select * from setmeal<where><if test="name != null">and name like concat('%',#{name},'%')</if><if test="categoryId != null">and category_id = #{categoryId}</if><if test="status != null">and status = #{status}</if></where></select>
</mapper>

Service层和其实现类

创建SetmealService.java

package com.sky.service;public interface SetmealService {/*** 条件查询* @param setmeal* @return*/List<Setmeal> list(Setmeal setmeal);/*** 根据id查询菜品选项* @param id* @return*/List<DishItemVO> getDishItemById(Long id);}

创建SetmealServiceImpl.java

package com.sky.service.impl;/*** 套餐业务实现*/
@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {@Autowiredprivate SetmealMapper setmealMapper;@Autowiredprivate SetmealDishMapper setmealDishMapper;@Autowiredprivate DishMapper dishMapper;/*** 条件查询* @param setmeal* @return*/public List<Setmeal> list(Setmeal setmeal) {List<Setmeal> list = setmealMapper.list(setmeal);return list;}/*** 根据id查询菜品选项* @param id* @return*/public List<DishItemVO> getDishItemById(Long id) {return setmealMapper.getDishItemBySetmealId(id);}
}

在DishService.java中添加listWithFlavor方法定义

	/*** 条件查询菜品和口味* @param dish* @return*/List<DishVO> listWithFlavor(Dish dish);

在DishServiceImpl.java中实现listWithFlavor方法

	/*** 条件查询菜品和口味* @param dish* @return*/public List<DishVO> listWithFlavor(Dish dish) {List<Dish> dishList = dishMapper.list(dish);List<DishVO> dishVOList = new ArrayList<>();for (Dish d : dishList) {DishVO dishVO = new DishVO();BeanUtils.copyProperties(d,dishVO);//根据菜品id查询对应的口味List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());dishVO.setFlavors(flavors);dishVOList.add(dishVO);}return dishVOList;}

Controller层

创建DishController.java

package com.sky.controller.user;@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {@Autowiredprivate DishService dishService;/*** 根据分类id查询菜品** @param categoryId* @return*/@GetMapping("/list")@ApiOperation("根据分类id查询菜品")public Result<List<DishVO>> list(Long categoryId) {Dish dish = new Dish();dish.setCategoryId(categoryId);dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品List<DishVO> list = dishService.listWithFlavor(dish);return Result.success(list);}}

创建CategoryController.java

package com.sky.controller.user;@RestController("userCategoryController")
@RequestMapping("/user/category")
@Api(tags = "C端-分类接口")
public class CategoryController {@Autowiredprivate CategoryService categoryService;/*** 查询分类* @param type* @return*/@GetMapping("/list")@ApiOperation("查询分类")public Result<List<Category>> list(Integer type) {List<Category> list = categoryService.list(type);return Result.success(list);}
}

创建SetmealController.java

package com.sky.controller.user;@RestController("userSetmealController")
@RequestMapping("/user/setmeal")
@Api(tags = "C端-套餐浏览接口")
public class SetmealController {@Autowiredprivate SetmealService setmealService;/*** 条件查询** @param categoryId* @return*/@GetMapping("/list")@ApiOperation("根据分类id查询套餐")public Result<List<Setmeal>> list(Long categoryId) {Setmeal setmeal = new Setmeal();setmeal.setCategoryId(categoryId);setmeal.setStatus(StatusConstant.ENABLE);List<Setmeal> list = setmealService.list(setmeal);return Result.success(list);}/*** 根据套餐id查询包含的菜品列表** @param id* @return*/@GetMapping("/dish/{id}")@ApiOperation("根据套餐id查询包含的菜品列表")public Result<List<DishItemVO>> dishList(@PathVariable("id") Long id) {List<DishItemVO> list = setmealService.getDishItemById(id);return Result.success(list);}
}