（一）从零开始搭建个人商城项目

一直想自己写一个完整的电商项目,但是一直下不了决心.

今天开始慢慢更新吧.

个人参考:1.尚硅谷谷粒商城;2.拉勾在线教育平台;3.开源商城mall 感谢

使用gitee创建仓库

拉到本地

新建父级pom.xml文件,其中有多余的依赖管理。

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.alter</groupId>
    <artifactId>mall-parent</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>pom</packaging>
    <name>ysl-mall</name>

    <!--
        1. 聚合工程里可以分为顶级项目（顶级工程、父工程）与子工程，这两者的关系其实就是父子继承的关系
        子工程在maven里称之为模块（module），模块之间是平级，是可以相互依赖的。
        2. 子模块可以使用顶级工程里所有的资源（依赖），子模块之间如果要使用资源，必须构建依赖（构建关系）
        3. 一个顶级工程是可以由多个不同的子工程共同组合而成。
    -->
    <!--依赖springboot-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.12.RELEASE</version>
        <relativePath/>
    </parent>
    <!--属性值-->
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR5</spring-cloud.version>
        <spring-cloud-alibaba.version>2.2.0.RELEASE</spring-cloud-alibaba.version>
        <!--starter-->
        <alter-mybatis-starter.version>1.0-SNAPSHOT</alter-mybatis-starter.version>
        <alter-starter-core.version>1.0-SNAPSHOT</alter-starter-core.version>
        <alter-starter-redis.version>1.0-SNAPSHOT</alter-starter-redis.version>
        <alter-starter-logback.version>1.0-SNAPSHOT</alter-starter-logback.version>
        <alter-selector-starter.version>1.0-SNAPSHOT</alter-selector-starter.version>
        <!--datasource-->
        <mysql-connector.version>8.0.25</mysql-connector.version>
        <druid.version>1.2.8</druid.version>
        <mybatis-plus-boot.version>3.4.3.3</mybatis-plus-boot.version>
        <mybatis-plus-generator.version>3.5.1</mybatis-plus-generator.version>

    </properties>

    <dependencies>
        <!-- 工具类 -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

    </dependencies>

    <!--    依赖版本管理    -->
    <dependencyManagement>
        <dependencies>
            <!--Spring Cloud 相关依赖-->
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!--Spring Cloud Alibaba 相关依赖-->
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <!--    自定义starter    -->
            <dependency>
                <groupId>com.alter</groupId>
                <artifactId>alter-mybatis-starter</artifactId>
                <version>${alter-mybatis-starter.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alter</groupId>
                <artifactId>alter-starter-core</artifactId>
                <version>${alter-starter-core.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alter</groupId>
                <artifactId>alter-starter-redis</artifactId>
                <version>${alter-starter-redis.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alter</groupId>
                <artifactId>alter-starter-logback</artifactId>
                <version>${alter-starter-logback.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alter</groupId>
                <artifactId>alter-selector-starter</artifactId>
                <version>${alter-selector-starter.version}</version>
            </dependency>
            <!--    mybatis、数据源    -->
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-generator</artifactId>
                <version>${mybatis-plus-generator.version}</version>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>${mybatis-plus-boot.version}</version>
            </dependency>
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                <version>${druid.version}</version>
            </dependency>
            <!--     Swagger-UI API文档生产工具    -->
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-boot-starter</artifactId>
                <version>${swagger2.version}</version>
            </dependency>
            <!--整合Knife4j-->
            <dependency>
                <groupId>com.github.xiaoymin</groupId>
                <artifactId>knife4j-spring-boot-starter</artifactId>
                <version>${knife4j.version}</version>
            </dependency>
            <!--hu-tool工具-->
            <dependency>
                <groupId>cn.hutool</groupId>
                <artifactId>hutool-core</artifactId>
                <version>${hutool.version}</version>
            </dependency>
            <dependency>
                <groupId>cn.hutool</groupId>
                <artifactId>hutool-json</artifactId>
                <version>${hutool.version}</version>
            </dependency>
            <dependency>
                <groupId>cn.hutool</groupId>
                <artifactId>hutool-crypto</artifactId>
                <version>${hutool.version}</version>
            </dependency>
        </dependencies>

    </dependencyManagement>
</project>

搭建后台admin项目

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.alter</groupId>
        <artifactId>ysl-mall</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <artifactId>mall-admin</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>mall-admin</name>
    <description>后台用户管理</description>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

</project>

自定义alter-mybatis-starter

alter-starter-mybatis的pom.xml

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <artifactId>alter-starter-mybatis</artifactId>
  <version>1.0-SNAPSHOT</version>
  <name>alter-starter-mybatis</name>

  <parent>
    <artifactId>mall-parent</artifactId>
    <groupId>com.alter</groupId>
    <version>1.0-SNAPSHOT</version>
  </parent>

  <dependencies>
    <dependency>
      <groupId>com.baomidou</groupId>
      <artifactId>mybatis-plus-boot-starter</artifactId>
    </dependency>
  </dependencies>
</project>

新增配置类MybatisPlusConfig，用于配置mybatisplus分页插件等配置；

package com.alter.mybatis.config;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.OptimisticLockerInnerInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author alter
 * plus分页插件 https://mp.baomidou.com/guide/page.html
 */
@Configuration
public class MybatisPlusConfig {

    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        // 分页插件
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
        // 乐观锁 https://mp.baomidou.com/guide/interceptor-optimistic-locker.html#optimisticlockerinnerinterceptor
        interceptor.addInnerInterceptor(new OptimisticLockerInnerInterceptor());
        return interceptor;
    }
}

新建实体类AlterDO、BaseDO，用于基础属性映射；

AlterDO:

package com.alter.mybatis.entity;

import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableLogic;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;
import java.time.LocalDateTime;

/**
 * 通用DO 包含逻辑删除字段，创建和更新时间
 * @author xww
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
public class AlterDO implements Serializable {

    @TableField(exist = false)
    private static final long serialVersionUID = 1L;

    @TableField("del_flag")
    @TableLogic
    private Integer delFlag;

    @TableField("create_time")
    private LocalDateTime createTime;

    @TableField("update_time")
    private LocalDateTime updateTime;

}

BaseDO:

package com.alter.mybatis.entity;

import com.baomidou.mybatisplus.annotation.TableField;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.NoArgsConstructor;

/**
 * 实体通用属性 增加创建用户和更新用户
 * @author alter
 */
@EqualsAndHashCode(callSuper = true)
@Data
@AllArgsConstructor
@NoArgsConstructor
public class BaseDO extends AlterDO {

    @TableField("create_user")
    private String createUser;

    @TableField("update_user")
    private String updateUser;

}

在mall-admin项目中引入alter-mybatis-starter,版本由父级pom控制。

<!--引入自定义starter-->
<dependency>
    <groupId>com.alter</groupId>
    <artifactId>alter-mybatis-starter</artifactId>
</dependency>

项目使用mysql，所以引入数据源和连接池，并引入自动生成代码插件

<!--引入数据源-->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-generator</artifactId>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
</dependency>
<!--引入模板文件-->
<dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
    <scope>test</scope>
</dependency>

编写测试类MyBatisGenerator，并生成基础代码

package com.alter.mall.admin;


import com.baomidou.mybatisplus.generator.FastAutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.OutputFile;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;
import org.junit.Test;

import java.io.File;
import java.util.Collections;

/**
 * 代码生成器
 * https://mp.baomidou.com/guide/generator-new.html#%E5%BF%AB%E9%80%9F%E5%85%A5%E9%97%A8
 */
public class MyBatisGenerator {

    /**
     * 数据源配置
     */
    private static final DataSourceConfig.Builder DATA_SOURCE_CONFIG = new DataSourceConfig
            .Builder("jdbc:mysql://localhost:3306/mall-swarm", "root", "root");

    /**
     * 执行 run
     */
    @Test
    public void Generate() {
        String fileOutputPath = new File("src/main/java").getPath();
        String resourcePath = new File("src/main/resources").getPath();
        FastAutoGenerator.create(DATA_SOURCE_CONFIG)
                //全局配置(GlobalConfig)
                .globalConfig(builder -> {
                    builder.author("alter") // 设置作者
                            .enableSwagger() // 开启 swagger 模式
                            .fileOverride() // 覆盖已生成文件
                            .outputDir(fileOutputPath) // 指定输出目录
                            .commentDate("yyyy-MM-dd"); // 注释日期
                })
                //包配置(PackageConfig)
                .packageConfig(builder -> {
                    builder.parent("com.alter.mall.admin") // 设置父包名
                            .moduleName("") // 设置父包模块名
                            .pathInfo(Collections.singletonMap(OutputFile.mapperXml, resourcePath + "/mapper")); // 设置mapperXml生成路径
                })
                //策略配置(StrategyConfig)
                .strategyConfig(builder -> builder
                        // 设置需要生成的表名
                        .addInclude(
                                "ums_admin", "ums_role", "ums_menu",
                                "ums_resource", "ums_resource_category", "ums_role_menu_relation",
                                "ums_role_resource_relation", "ums_admin_role_relation")
                        .addTablePrefix("ums_") //设置过滤表前缀
                        .controllerBuilder() //#配置controller#
                        .enableRestStyle() //生成@RestController
                        .enableHyphenStyle() //驼峰转连字符
                        .serviceBuilder() //#配置service#
                        .formatServiceFileName("%sService") //格式化service接口文件名称
                        .entityBuilder() //#配置实体#
                        .superClass(BaseDO.class) //设置父类
                        .enableLombok() //开启lombok模型
                        .addTableFills( //添加表字段填充
                                new Column("create_time", FieldFill.INSERT),
                                new Column("update_time", FieldFill.UPDATE)
                        )
                        //*配置mapper*
                        .mapperBuilder()
                        .enableMapperAnnotation() //开启@Mapper注解
                )
                //模板配置(TemplateConfig)
                .templateEngine(new FreemarkerTemplateEngine()) // 使用Freemarker引擎模板，默认的是Velocity引擎模板
                .execute();
    }
}

运行测试方法，生成的如下：