SpringBoot构建电商基础秒杀项目 学习笔记

修改 DOMapper

在 UserPasswordDOMapper.xml 添加：

  <select id="selectByUserId" parameterType="java.lang.Integer" resultMap="BaseResultMap">select<include refid="Base_Column_List" />from user_passwordwhere user_id = #{userId,jdbcType=INTEGER}</select>

在 UserPasswordDOMapper 添加：

UserPasswordDO selectByUserId(Integer userId);

添加 model

public class UserModel {private Integer id;private String name;private Byte gender;private Integer age;private String telphone;private String registerMode;private String thirdPartyId;private String encrptPassword;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Byte getGender() {return gender;}public void setGender(Byte gender) {this.gender = gender;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public String getTelphone() {return telphone;}public void setTelphone(String telphone) {this.telphone = telphone;}public String getRegisterMode() {return registerMode;}public void setRegisterMode(String registerMode) {this.registerMode = registerMode;}public String getThirdPartyId() {return thirdPartyId;}public void setThirdPartyId(String thirdPartyId) {this.thirdPartyId = thirdPartyId;}public String getEncrptPassword() {return encrptPassword;}public void setEncrptPassword(String encrptPassword) {this.encrptPassword = encrptPassword;}}

添加 service

添加接口：

public interface UserService {UserModel getUserById(Integer id);
}

添加接口的实现：

@Service
public class UserServiceImpl implements UserService {@Autowiredprivate UserDOMapper userDOMapper;@Autowiredprivate UserPasswordDOMapper userPasswordDOMapper;@Overridepublic UserModel getUserById(Integer id){UserDO userDO = userDOMapper.selectByPrimaryKey(id);if(userDO == null){return null;}UserPasswordDO userPasswordDO = userPasswordDOMapper.selectByUserId(userDO.getId());return convertFromDataObject(userDO, userPasswordDO);}private UserModel convertFromDataObject(UserDO userDO, UserPasswordDO userPasswordDO){if(userDO == null){return null;}UserModel userModel = new UserModel();BeanUtils.copyProperties(userDO, userModel);if(userPasswordDO != null){userModel.setEncrptPassword(userPasswordDO.getEncrptPassword());}return userModel;}
}

添加 viewobject

public class UserVO {private Integer id;private String name;private Byte gender;private Integer age;private String telphone;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Byte getGender() {return gender;}public void setGender(Byte gender) {this.gender = gender;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public String getTelphone() {return telphone;}public void setTelphone(String telphone) {this.telphone = telphone;}
}

添加 controller

@Controller("user")
@RequestMapping("/user")
public class UserController {@Autowiredprivate UserService userService;@RequestMapping("/get")@ResponseBodypublic UserVO getUser(@RequestParam(name="id") Integer id){UserModel userModel = userService.getUserById(id);return convertFromModel(userModel);}private UserVO convertFromModel(UserModel userModel){if(userModel == null){return null;}UserVO userVO = new UserVO();BeanUtils.copyProperties(userModel, userVO);return userVO;}
}

• data object: 与数据库完全映射，不包含任何逻辑

• model: 业务交互逻辑模型

• view object: 前端展示数据

源码：spring-boot-seckill