导入用户地址簿相关功能代码

菜品展示

 购物车模块

 加入购物车：

@PostMapping("/add")
public R add(@RequestBody ShoppingCart shoppingCart){
    //获取当前线程用户的id并设置到shoppingCart中
    Long currentId = BaseContext.getCurrentId();

    shoppingCart.setUserId(currentId);
    //首先我们要判断当前购物车是否已经有同样的dish或者setmeal
    LambdaQueryWrapper<ShoppingCart> lambdaQueryWrapper=new LambdaQueryWrapper<>();
    //先判断
    lambdaQueryWrapper.eq(ShoppingCart::getUserId,shoppingCart.getUserId());
    //如果有dishID说明是添加的是菜品，没有则表示是套餐
    if (shoppingCart.getDishId()!=null){
        lambdaQueryWrapper.eq(ShoppingCart::getDishId,shoppingCart.getDishId());
    }else {
        lambdaQueryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
    }

    ShoppingCart shoppingCart1 = shoppingCartService.getOne(lambdaQueryWrapper);
    //如果查出来了说明当前已经有了，我们把number+1
    if (shoppingCart1!=null){
        shoppingCart1.setNumber(shoppingCart1.getNumber()+1);
        shoppingCartService.updateById(shoppingCart1);
    }else {
        //如果没查出来说明没有，我们存储数据 初始化number为1
        shoppingCart.setNumber(1);

        //给控的shoppingCart1赋值，保持两种情况返回的都是shoppingCart1
        shoppingCart1=shoppingCart;
        shoppingCartService.save(shoppingCart1);
    }


    return new R(1,"添加菜品或套餐成功",shoppingCart1);

数量减少

@PostMapping("/sub")
public R sub(@RequestBody ShoppingCart shoppingCart){
    //首先获取当前用户id
    Long currentId = BaseContext.getCurrentId();
    LambdaQueryWrapper<ShoppingCart> queryWrapper=new LambdaQueryWrapper<>();
    queryWrapper.eq(ShoppingCart::getUserId,currentId);
    //判断是dish还是setmeal
    if (shoppingCart.getDishId()!=null){
        queryWrapper.eq(ShoppingCart::getDishId,shoppingCart.getDishId());
    }else {
        queryWrapper.eq(ShoppingCart::getSetmealId,shoppingCart.getSetmealId());
    }
    ShoppingCart one = shoppingCartService.getOne(queryWrapper);
    int number=one.getNumber();
    //如果number>1就减，如果是1就删除数据
    if (number>1){
        one.setNumber(number-1);
        shoppingCartService.updateById(one);
    }else if(number==1){
        one.setNumber(0);
        shoppingCartService.removeById(one);
    }
    return new R(1,"减少成功",one);

}

清空购物车

@DeleteMapping("clean")
public R clean(){
    LambdaQueryWrapper<ShoppingCart> queryWrapper =new LambdaQueryWrapper<>();
    queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());
    shoppingCartService.remove(queryWrapper);

    return new R(1,"清空购物车成功");


}

用户下单