1.环境配置

1.创建会员中心模块

2.检查父子模块的pom.xml

1.父模块

注意：如果父模块中的依赖显示not found，原因是子模块并没有引用，不用在意

2.子模块

3.pom.xml 引入相关依赖（别忘记刷新maven）

    <dependencies><!-- springboot web starter --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId><!-- 如果在子工程/模块指定了 version，则以指定为准 --></dependency><!-- 1. starter-actuator 是 springboot 程序的监控系统，可以实现健康检查，info 信息等2. 访问 http://localhost:10000/actuator 可以看到相关链接, 还可以做相关设置. --><!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!-- mybatis --><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId></dependency><!-- druid --><dependency><groupId>com.alibaba</groupId><artifactId>druid-spring-boot-starter</artifactId><!-- 这里我们重新指定一下 version 因为父项目中没有对这个依赖进行版本仲裁--><version>1.1.13</version></dependency><!-- mysql --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId></dependency><!-- jdbc --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency><!-- lombok --><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><!-- test --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies>

4.application.yml 进行基本配置

server:port: 10000 # 配置服务端口
spring:application:name: member-service-provider-10000 # 配置服务的名称，名字任意这里与项目名保持一致datasource:type: com.alibaba.druid.pool.DruidDataSource# 别忘记创建数据库之后修改数据库名称url: jdbc:mysql://localhost:3306/xxx?useSSL=false&useUnicode=true&characterEncoding=UTF-8username: rootpassword: root
mybatis:mapper-locations: classpath:mapper/*.xml # 扫描所有Mapper.xmltype-aliases-package: com.sun.springcloud.entity # 扫描所有实体类，可以直接使用类名来标识

5.com/sun/springcloud/MemberApplication.java 编写主程序测试

package com.sun.springcloud;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;/*** Description:** @Author sun* @Create 2024/3/22 12:49* @Version 1.0*/
@SpringBootApplication
public class MemberApplication {public static void main(String[] args) {SpringApplication.run(MemberApplication.class, args);}
}

6.出现两个问题

1.端口冲突，所以这里换一个端口为10001，将子模块名也一并修改！

2.数据库没创建

7.使用云数据库

1.数据库表设计

CREATE DATABASE e_commerce_center_db;
USE e_commerce_center_db;
CREATE TABLE member
(id BIGINT NOT NULL AUTO_INCREMENT COMMENT 'id',NAME VARCHAR(64) COMMENT '用户名',pwd CHAR(32) COMMENT '密码',mobile VARCHAR(20) COMMENT '手机号码',email VARCHAR(64) COMMENT '邮箱',gender TINYINT COMMENT '性别', PRIMARY KEY (id)
);
INSERT INTO member VALUES(NULL, 'smith', MD5('123'), '123456789000', 'smith@sohu.com', 1);
SELECT * from member;

2.修改application.yml 的port，name以及数据库配置

server:port: 10001 # 配置服务端口
spring:application:name: member-service-provider-10001 # 配置服务的名称，名字任意这里与项目名保持一致datasource:type: com.alibaba.druid.pool.DruidDataSource# 别忘记创建数据库之后修改数据库名称url: 你连接数据库的urlusername: sdfsdfsdpassword: 88888
mybatis:mapper-locations: classpath:mapper/*.xml # 扫描所有Mapper.xmltype-aliases-package: com.sun.springcloud.entity # 扫描所有实体类，可以直接使用类名来标识

3.执行主程序测试

2.代码编写

1.com/sun/springcloud/entity/Member.java 创建实体类

package com.sun.springcloud.entity;import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;import java.io.Serializable;/*** Description:** @Author sun* @Create 2024/3/23 11:10* @Version 1.0*/@AllArgsConstructor
@NoArgsConstructor
@Data
//Serializable 加上，后面可能使用
public class Member implements Serializable {private Long id;private String name;private String pwd;private String mobile;private String email;private Integer gender;
}

2.com/sun/springcloud/util/Result.java 封装响应结果的工具类

package com.sun.springcloud.util;/*** Description: 用于返回结果， 利于 json 格式** @Author sun* @Create 2024/3/23 11:12* @Version 1.0*/public class Result<T> {private String code;private String msg;private T data;public String getCode() {return code;}public void setCode(String code) {this.code = code;}public String getMsg() {return msg;}public void setMsg(String msg) {this.msg = msg;}public T getData() {return data;}public void setData(T data) {this.data = data;}public Result() {}public Result(T data) {this.data = data;}public static Result success() {Result result = new Result<>();result.setCode("200");result.setMsg("success");return result;}public static <T> Result<T> success(T data) {Result<T> result = new Result<>(data);result.setCode("200");result.setMsg("success");return result;}public static <T> Result<T> success(String msg, T data) {Result<T> result = new Result<>(data);result.setCode("200");result.setMsg(msg);return result;}public static Result error(String code, String msg) {Result result = new Result();result.setCode(code);result.setMsg(msg);return result;}public static <T> Result<T> error(String code, String msg, T data) {Result<T> result = new Result<>(data);result.setCode(code);result.setMsg(msg);return result;}
}

3.编写dao层

1.com/sun/springcloud/dao/MemberDao.java 编写Mapper接口并注入容器

package com.sun.springcloud.dao;import com.sun.springcloud.entity.Member;
import org.apache.ibatis.annotations.Mapper;/*** Description: 对member表进行操作** @Author sun* @Create 2024/3/23 21:06* @Version 1.0*/
@Mapper // 注入容器
public interface MemberDao {/*** 根据id进行查询* @param id* @return 查询成功返回Member对象，查询失败返回null*/public Member queryMemberById(Long id);/*** 保存一条记录* @param member* @return 返回受影响的行数*/public int save(Member member);
}

2.mapper/MemberMapper.xml 编写Mapper实现类

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""https://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.sun.springcloud.dao.MemberDao"><resultMap id="BaseResultMap" type="Member"><id column="id" property="id" jdbcType="BIGINT"></id><id column="name" property="name" jdbcType="VARCHAR"></id><id column="pwd" property="pwd" jdbcType="VARCHAR"></id><id column="mobile" property="mobile" jdbcType="VARCHAR"></id><id column="email" property="email" jdbcType="VARCHAR"></id><id column="gender" property="gender" jdbcType="TINYINT"></id></resultMap><select id="queryMemberById" parameterType="Long" resultMap="BaseResultMap">select * from `member` where `id` = #{id}</select><!-- useGeneratedKeys="true" keyProperty="id" 表示插入之后将自增的主键id的值返回到Member对象中 --><insert id="save" parameterType="Member" useGeneratedKeys="true" keyProperty="id">INSERT INTO `member` VALUES(NULL, #{name}, MD5(#{pwd}), #{mobile}, #{email}, #{gender});</insert>
</mapper>

3.com/sun/springcloud/MemberApplicationTest.java 测试dao层

package com.sun.springcloud;import com.sun.springcloud.dao.MemberDao;
import com.sun.springcloud.entity.Member;
import lombok.extern.slf4j.Slf4j;
import org.junit.Assert;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;import javax.annotation.Resource;/*** Description:** @Author sun* @Create 2024/3/23 21:46* @Version 1.0*/
@SpringBootTest
@Slf4j
public class MemberApplicationTest {@Resourceprivate MemberDao memberDao;@Testpublic void queryMemberById() {Member member = memberDao.queryMemberById(1L);log.info("member={}", member);}@Testpublic void save() {Member member = new Member();member.setName("sun");member.setPwd("12121");member.setMobile("2342343");member.setEmail("123@qq.com");member.setGender(0);int save = memberDao.save(member);Assert.assertEquals(1, save);}
}

4.编写service层

1.com/sun/springcloud/service/MemberService.java 编写service接口

package com.sun.springcloud.service;import com.sun.springcloud.entity.Member;/*** Description: 对member表进行操作的service** @Author sun* @Create 2024/3/23 22:02* @Version 1.0*/
public interface MemberService {/*** 根据id获取一条记录** @param id* @return 成功返回member对象，失败返回null*/public Member queryMemberById(Long id);/*** 保存一条记录** @param member* @return 成功返回1，失败返回0*/public int save(Member member);}

2.com/sun/springcloud/service/Impl/MemberServiceImpl.java 编写service实现类并注入容器

package com.sun.springcloud.service.Impl;import com.sun.springcloud.dao.MemberDao;
import com.sun.springcloud.entity.Member;
import com.sun.springcloud.service.MemberService;
import org.springframework.stereotype.Service;import javax.annotation.Resource;/*** Description: member表的service实现类** @Author sun* @Create 2024/3/23 22:05* @Version 1.0*/
@Service // 注入容器
public class MemberServiceImpl implements MemberService {@Resource // 依赖注入memberdaoprivate MemberDao memberDao;@Overridepublic Member queryMemberById(Long id) {return memberDao.queryMemberById(id);}@Overridepublic int save(Member member) {return memberDao.save(member);}
}

3.测试service层

    @Testpublic void queryMemberById2() {Member member = memberService.queryMemberById(1L);log.info("member={}", member);}@Testpublic void save2() {Member member = new Member();member.setName("sun");member.setPwd("12121");member.setMobile("2342343");member.setEmail("123@qq.com");member.setGender(0);int save = memberService.save(member);Assert.assertEquals(1, save);}

5.编写controller层

1.com/sun/springcloud/controller/MemberController.java 编写controller

package com.sun.springcloud.controller;import com.sun.springcloud.entity.Member;
import com.sun.springcloud.service.MemberService;
import com.sun.springcloud.util.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.*;import javax.annotation.Resource;/*** Description: member表的控制器** @Author sun* @Create 2024/3/23 22:24* @Version 1.0*/
@RestController
@Slf4j
public class MemberController {@Resource // 注入serviceprivate MemberService memberService;/*** 根据前端传进来的json数据插入一条记录** @param member json类型的member对象数据* @return 返回json类型的响应*/@PostMapping("/member/save")public Result save(@RequestBody Member member) {int save = memberService.save(member);if (save > 0) {return Result.success("添加会员成功！", save);} else {return Result.error("401", "添加会员失败");}}/*** 根据id来获取某个会员的信息** @param id 使用路径参数的形式传入参数* @return 返回json格式的数据*/@GetMapping("/member/get/{id}") // 这里使用的路径参数public Result getMemberById(@PathVariable("id") Long id) {Member member = memberService.queryMemberById(id);if (member != null) {return Result.success("查询成功！", member);} else {return Result.error("402", "ID= " + id + "不存在");}}
}

2.postman测试