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: xxx
secret: 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: token
user-secret-key: itheima
user-ttl: 7200000
user-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 {
@Autowired
private UserService userService;
@Autowired
private 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";
@Autowired
private WeChatProperties weChatProperties;
@Autowired
private 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openid
Map<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);
}
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 {
@Autowired
private 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：
@Autowired
private 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
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 {
@Autowired
private SetmealMapper setmealMapper;
@Autowired
private SetmealDishMapper setmealDishMapper;
@Autowired
private 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 {
@Autowired
private 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 {
@Autowired
private 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 {
@Autowired
private 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);
}
}