2.微服务-配置

引入springcloud的pom配置

<parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.7.12</version><relativePath/></parent>

<dependencyManagement><dependencies><!--spring cloud--><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring-cloud.version}</version><type>pom</type><scope>import</scope></dependency><!--spring cloud alibaba--><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-alibaba-dependencies</artifactId><version>${spring-cloud-alibaba.version}</version><type>pom</type><scope>import</scope></dependency>
</dependencyManagement>

注意：

1.引入springcloud相关的type都是pom类型的。

2.springboot与springcloud的版本匹配。

<properties><spring-cloud.version>2021.0.3</spring-cloud.version><spring-cloud-alibaba.version>2021.0.4.0</spring-cloud-alibaba.version>
</properties>

商场项目的模块划分

1.用户模块

2.商品模块

3.购物车模块

4.订单模块

5.支付模块

登录功能代码学习

验证前端传入接口的参数

定义登录请求DTO对象，验证每个参数功能

<dependency><groupId>org.hibernate.validator</groupId><artifactId>hibernate-validator</artifactId></dependency>

@NotNull 

import io.swagger.annotations.ApiModelProperty;
import lombok.Data;import javax.validation.constraints.NotNull;@Data
@ApiModel(description = "登录表单实体")
public class LoginFormDTO {@ApiModelProperty(value = "用户名", required = true)@NotNull(message = "用户名不能为空")private String username;@NotNull(message = "密码不能为空")@ApiModelProperty(value = "用户名", required = true)private String password;@ApiModelProperty(value = "是否记住我", required = false)private Boolean rememberMe = false;
}

@Validated注解来验证 

@ApiOperation("用户登录接口")@PostMapping("login")public UserLoginVO login(@RequestBody @Validated LoginFormDTO loginFormDTO){return userService.login(loginFormDTO);}

lambdaQuery()方法根据某个字段查询DB

mybatisplus中 Service层实现了IService接口后就拥有此功能

// 2.根据用户名或手机号查询
User user = lambdaQuery().eq(User::getUsername, username).one();

定义一个枚举

注意@EnumValue注解

import com.baomidou.mybatisplus.annotation.EnumValue;
import com.hmall.common.exception.BadRequestException;
import lombok.Getter;@Getter
public enum UserStatus {FROZEN(0, "禁止使用"),NORMAL(1, "已激活"),;@EnumValueint value;String desc;UserStatus(Integer value, String desc) {this.value = value;this.desc = desc;}public static UserStatus of(int value) {if (value == 0) {return FROZEN;}if (value == 1) {return NORMAL;}throw new BadRequestException("账户状态错误");}
}

对应数据库表中设计

`status` int DEFAULT '1' COMMENT '使用状态（1正常 2冻结）',
`create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
`update_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',

对应java程序的写法

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import com.hmall.user.enums.UserStatus;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.experimental.Accessors;import java.io.Serializable;
import java.time.LocalDateTime;@Data
@EqualsAndHashCode(callSuper = false)
@Accessors(chain = true)
@TableName("user")
public class User implements Serializable {private static final long serialVersionUID = 1L;/*** 使用状态（1正常 2冻结）*/private UserStatus status;/*** 创建时间*/private LocalDateTime createTime;private LocalDateTime updateTime;
}

枚举对象可以直接使用==来比较

        // 3.校验是否禁用if (user.getStatus() == UserStatus.FROZEN) {throw new ForbiddenException("用户被冻结");}