电商网站开发面试题百度推广深圳分公司

1.1 需求分析和设计

1.1.1 产品原型

地址簿，指的是消费者用户的地址信息，用户登录成功后可以维护自己的地址信息。同一个用户可以有多个地址信息，但是只能有一个默认地址。

对于地址簿管理，有以下几个功能：

• 查询地址列表
• 新增地址
• 修改地址
• 删除地址
• 设置默认地址
• 查询默认地址

1.1.2 接口设计

根据上述原型图先粗粒度设计接口，共包含7个接口。

接口设计：

• 新增地址
• 查询登录用户所有地址
• 查询默认地址
• 根据id修改地址
• 根据id删除地址
• 根据id查询地址
• 设置默认地址

接下来细粒度分析每个接口，明确每个接口的请求方式、请求路径、传入参数和返回值。

1). 新增地址

2). 查询登录用户所有地址

3). 查询默认地址

4). 修改地址

5). 根据id删除地址

6). 根据id查询地址

7). 设置默认地址

1.1.3 表设计

用户的地址信息会存储在address_book表，即地址簿表中。具体表结构如下：

字段名	数据类型	说明	备注
id	bigint	主键	自增
user_id	bigint	用户id	逻辑外键
consignee	varchar(50)	收货人
sex	varchar(2)	性别
phone	varchar(11)	手机号
province_code	varchar(12)	省份编码
province_name	varchar(32)	省份名称
city_code	varchar(12)	城市编码
city_name	varchar(32)	城市名称
district_code	varchar(12)	区县编码
district_name	varchar(32)	区县名称
detail	varchar(200)	详细地址信息	具体到门牌号
label	varchar(100)	标签	公司、家、学校
is_default	tinyint(1)	是否默认地址	1是 0否

这里面有一个字段is_default，实际上我们在设置默认地址时，只需要更新这个字段就可以了。

1.2 代码实现

1.2.1 Mapper层

创建AddressBookMapper.java

package com.sky.mapper;import com.sky.entity.AddressBook;
import org.apache.ibatis.annotations.*;
import java.util.List;@Mapper
public interface AddressBookMapper {/*** 条件查询* @param addressBook* @return*/List<AddressBook> list(AddressBook addressBook);/*** 新增* @param addressBook*/@Insert("insert into address_book" +"        (user_id, consignee, phone, sex, province_code, province_name, city_code, city_name, district_code," +"         district_name, detail, label, is_default)" +"        values (#{userId}, #{consignee}, #{phone}, #{sex}, #{provinceCode}, #{provinceName}, #{cityCode}, #{cityName}," +"                #{districtCode}, #{districtName}, #{detail}, #{label}, #{isDefault})")void insert(AddressBook addressBook);/*** 根据id查询* @param id* @return*/@Select("select * from address_book where id = #{id}")AddressBook getById(Long id);/*** 根据id修改* @param addressBook*/void update(AddressBook addressBook);/*** 根据 用户id修改 是否默认地址* @param addressBook*/@Update("update address_book set is_default = #{isDefault} where user_id = #{userId}")void updateIsDefaultByUserId(AddressBook addressBook);/*** 根据id删除地址* @param id*/@Delete("delete from address_book where id = #{id}")void deleteById(Long id);}

创建AddressBookMapper.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.sky.mapper.AddressBookMapper"><select id="list" parameterType="AddressBook" resultType="AddressBook">select * from address_book<where><if test="userId != null">and user_id = #{userId}</if><if test="phone != null">and phone = #{phone}</if><if test="isDefault != null">and is_default = #{isDefault}</if></where></select><update id="update" parameterType="addressBook">update address_book<set><if test="consignee != null">consignee = #{consignee},</if><if test="sex != null">sex = #{sex},</if><if test="phone != null">phone = #{phone},</if><if test="detail != null">detail = #{detail},</if><if test="label != null">label = #{label},</if><if test="isDefault != null">is_default = #{isDefault},</if></set>where id = #{id}</update></mapper>

1.2.2 Service层

创建AddressBookService.java

package com.sky.service;import com.sky.entity.AddressBook;
import java.util.List;public interface AddressBookService {List<AddressBook> list(AddressBook addressBook);void save(AddressBook addressBook);AddressBook getById(Long id);void update(AddressBook addressBook);void setDefault(AddressBook addressBook);void deleteById(Long id);}

创建AddressBookServiceImpl.java

package com.sky.service.impl;@Service
@Slf4j
public class AddressBookServiceImpl implements AddressBookService {@Autowiredprivate AddressBookMapper addressBookMapper;/*** 条件查询** @param addressBook* @return*/public List<AddressBook> list(AddressBook addressBook) {return addressBookMapper.list(addressBook);}/*** 新增地址** @param addressBook*/public void save(AddressBook addressBook) {addressBook.setUserId(BaseContext.getCurrentId());addressBook.setIsDefault(0);addressBookMapper.insert(addressBook);}/*** 根据id查询** @param id* @return*/public AddressBook getById(Long id) {AddressBook addressBook = addressBookMapper.getById(id);return addressBook;}/*** 根据id修改地址** @param addressBook*/public void update(AddressBook addressBook) {addressBookMapper.update(addressBook);}/*** 设置默认地址** @param addressBook*/@Transactionalpublic void setDefault(AddressBook addressBook) {//1、将当前用户的所有地址修改为非默认地址 update address_book set is_default = ? where user_id = ?addressBook.setIsDefault(0);addressBook.setUserId(BaseContext.getCurrentId());addressBookMapper.updateIsDefaultByUserId(addressBook);//2、将当前地址改为默认地址 update address_book set is_default = ? where id = ?addressBook.setIsDefault(1);addressBookMapper.update(addressBook);}/*** 根据id删除地址** @param id*/public void deleteById(Long id) {addressBookMapper.deleteById(id);}}

1.2.3 Controller层

package com.sky.controller.user;@RestController
@RequestMapping("/user/addressBook")
@Api(tags = "C端地址簿接口")
public class AddressBookController {@Autowiredprivate AddressBookService addressBookService;/*** 查询当前登录用户的所有地址信息** @return*/@GetMapping("/list")@ApiOperation("查询当前登录用户的所有地址信息")public Result<List<AddressBook>> list() {AddressBook addressBook = new AddressBook();addressBook.setUserId(BaseContext.getCurrentId());List<AddressBook> list = addressBookService.list(addressBook);return Result.success(list);}/*** 新增地址** @param addressBook* @return*/@PostMapping@ApiOperation("新增地址")public Result save(@RequestBody AddressBook addressBook) {addressBookService.save(addressBook);return Result.success();}@GetMapping("/{id}")@ApiOperation("根据id查询地址")public Result<AddressBook> getById(@PathVariable Long id) {AddressBook addressBook = addressBookService.getById(id);return Result.success(addressBook);}/*** 根据id修改地址** @param addressBook* @return*/@PutMapping@ApiOperation("根据id修改地址")public Result update(@RequestBody AddressBook addressBook) {addressBookService.update(addressBook);return Result.success();}/*** 设置默认地址** @param addressBook* @return*/@PutMapping("/default")@ApiOperation("设置默认地址")public Result setDefault(@RequestBody AddressBook addressBook) {addressBookService.setDefault(addressBook);return Result.success();}/*** 根据id删除地址** @param id* @return*/@DeleteMapping@ApiOperation("根据id删除地址")public Result deleteById(Long id) {addressBookService.deleteById(id);return Result.success();}/*** 查询默认地址*/@GetMapping("default")@ApiOperation("查询默认地址")public Result<AddressBook> getDefault() {//SQL:select * from address_book where user_id = ? and is_default = 1AddressBook addressBook = new AddressBook();addressBook.setIsDefault(1);addressBook.setUserId(BaseContext.getCurrentId());List<AddressBook> list = addressBookService.list(addressBook);if (list != null && list.size() == 1) {return Result.success(list.get(0));}return Result.error("没有查询到默认地址");}}

后记
👉👉💕💕美好的一天，到此结束，下次继续努力！欲知后续，请看下回分解，写作不易，感谢大家的支持！！ 🌹🌹🌹