关于后端:SpringBoot还不会SpringBoot项目模块分层来这手把手教你

常常看到网上很多 优良的开源我的项目中，代码简洁，模块分层完满 。反观本人代码层级凌乱，，却不知如何整顿分层。此文 手把手教你一步一步创立模块 ，左手右手一个慢动作。联合自己理论开发及集体我的项目中 分层思路的分享，大神请勿喷。

约 25 分钟

熟练掌握 SpringBoot 我的项目分层思路，丝滑拆分模块
相熟代码层级依赖，规范化治理模块散布
手把手实战学习，实践实际相结合

对于 Springboot 相熟然而不晓得正当分层小白
有本人分层思路能够相互分享学习

公众号：JavaDog 程序狗
在公众号，发送【分层】，无任何套路即可取得

或拜访 https://blog.javadog.net/archives/boot-module

下图反面教材，传统单体利用，构造臃肿

下图分层截选自自己的一个小我的项目，模块清晰，分工明确

咱们要实现的小栗子的分层

起名第一步，一个好名字, 说不定是个好的开始

如果咱们的我的项目是个 聊天相干 的我的项目，英文对应chat, 所以定义我的项目名为chat-boot，其余的以此效仿

点击 New->project

抉择 Maven 项 目，并抉择 适合 JDK 版本, 点击 Next

录入项目名称，并填写 GAV 坐标，点击 Finish

删除无用文件及目录，如 src 目录和 *.iml 文件

删除后我的项目目录

批改 pom.xml 中依赖，减少 spring-boot-starter-parent

 <parent>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-parent</artifactId>
     <version>2.3.1.RELEASE</version>
 </parent>

右击我的项目 chat-boot，new ->Moudle 新建模块 chat-boot-dependencies

抉择对应 Module SDK 版本，自己抉择 jdk1.8

填写子模块名 chat-boot-dependencies，而后查看对应 GAV，点击 Finish

生成子模块 chat-boot-dependencies 如下图

删除 chat-boot-dependencies 下无用文件及目录，如 src 目录，删除无用目录如下

欠缺 chat-boot-dependencies 下 pom.xml 依赖，罕用依赖 放入，作为 依赖主体 ，以下是本狗罕用依赖，可酌情抉择； 记得把 packaging 改为 pom

<?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">
    <parent>
        <artifactId>chat-boot</artifactId>
        <groupId>net.javadog.chat</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>chat-dependencies</artifactId>

    <packaging>pom</packaging>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <mysql-connector-java.version>8.0.17</mysql-connector-java.version>
        <druid.version>1.1.21</druid.version>
        <mybatis-plus.version>3.4.1</mybatis-plus.version>
        <fastjson.version>1.2.75</fastjson.version>
        <hutool.version>5.5.8</hutool.version>
        <lombok.versin>1.18.12</lombok.versin>
        <easypoi.version>4.2.0</easypoi.version>
        <springfox-swagger2.version>2.9.2</springfox-swagger2.version>
        <springfox-swagger-ui.version>2.9.2</springfox-swagger-ui.version>
        <knife4j.version>2.0.4</knife4j.version>
        <weixin.version>4.4.5.B</weixin.version>
        <shiro.version>1.3.2</shiro.version>
        <jwt.version>3.2.0</jwt.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <!--mybatis-plus-->
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus-boot-starter</artifactId>
                <version>${mybatis-plus.version}</version>
            </dependency>

            <!-- 数据库驱动, 可依据本人须要自行删减，默认应用 mysql -->
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>${mysql-connector-java.version}</version>
            </dependency>

            <!-- 数据库连接池 -->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>${druid.version}</version>
            </dependency>

            <!--fastjson-->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>${fastjson.version}</version>
            </dependency>

            <!--hutool-->
            <dependency>
                <groupId>cn.hutool</groupId>
                <artifactId>hutool-all</artifactId>
                <version>${hutool.version}</version>
            </dependency>

            <!--lombok-->
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>${lombok.versin}</version>
            </dependency>

            <!--swagger2-->
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger2</artifactId>
                <version>${springfox-swagger2.version}</version>
            </dependency>

            <!--swagger-ui-->
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger-ui</artifactId>
                <version>${springfox-swagger-ui.version}</version>
            </dependency>

            <!-- swagger 接口文档 -->
            <dependency>
                <groupId>com.github.xiaoymin</groupId>
                <artifactId>knife4j-spring-boot-starter</artifactId>
                <version>${knife4j.version}</version>
            </dependency>

            <!--easypoi 导入导出 -->
            <dependency>
                <groupId>cn.afterturn</groupId>
                <artifactId>easypoi-base</artifactId>
                <version>${easypoi.version}</version>
            </dependency>

            <!--WxJava - 微信开发 Java SDK-->
            <dependency>
                <groupId>com.github.binarywang</groupId>
                <artifactId>weixin-java-miniapp</artifactId>
                <version>${weixin.version}</version>
            </dependency>

            <!-- 整合 Shiro 平安框架 -->
            <dependency>
                <groupId>org.apache.shiro</groupId>
                <artifactId>shiro-spring</artifactId>
                <version>${shiro.version}</version>
            </dependency>

            <!-- 集成 jwt 实现 token 认证 -->
            <dependency>
                <groupId>com.auth0</groupId>
                <artifactId>java-jwt</artifactId>
                <version>${jwt.version}</version>
            </dependency>
        </dependencies>
    </dependencyManagement>
</project>

此处用的标签是 dependencyManagement，

dependencyManagement 只是申明依赖，并不实现引入 ，因而 子项目须要显示的申明须要用的依赖 。如果 不在子项目中申明依赖，是不会从父我的项目中继承下来 ； 只有在子项目中写了该依赖项，并且没有指定具体版本，才会从父我的项目中继承该项，并且 version 和 scope 都读取自父 pom; 另外如果子项目中指定了版本号，那么会应用子项目中指定的 jar 版本。

右击我的项目 chat-boot，new ->Moudle 新建模块 chat-boot-main

抉择对应 Module SDK 版本，本狗抉择 jdk1.8，点击 Next

填写子模块名 chat-boot-main，而后查看对应 GAV，点击 Finish

生成子模块 chat-boot-main 如下图

欠缺 chat-boot-main 模块下 pom.xml 中依赖

引入必要依赖
欠缺 profiles 标签中环境相干
配置 build 标签中插件

<?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">
    <parent>
        <artifactId>chat-boot</artifactId>
        <groupId>net.javadog.chat</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>chat-boot-main</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>net.javadog.chat</groupId>
                <artifactId>chat-boot-dependencies</artifactId>
                <version>1.0-SNAPSHOT</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <!-- web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <!--swagger2-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
        </dependency>
        <!--swagger-ui-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
        </dependency>
        <!-- swagger 接口文档 -->
        <dependency>
            <groupId>com.github.xiaoymin</groupId>
            <artifactId>knife4j-spring-boot-starter</artifactId>
        </dependency>
    </dependencies>

    <build>
        <finalName>chat</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <fork>true</fork>
                </configuration>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>src/main/webapp</directory>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
        </resources>
    </build>

    <profiles>
        <profile>
            <id>local</id>
            <properties>
                <spring.active>local</spring.active>
            </properties>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
        </profile>
        <profile>
            <id>dev</id>
            <properties>
                <spring.active>dev</spring.active>
            </properties>
        </profile>
        <profile>
            <id>prod</id>
            <properties>
                <spring.active>prod</spring.active>
            </properties>
        </profile>
    </profiles>
</project>

配置引入依赖 chat-boot-dependencies, 用作此模块依赖引入

<dependencyManagement>
     <dependencies>
         <dependency>
             <groupId>net.javadog.chat</groupId>
             <artifactId>chat-boot-dependencies</artifactId>
             <version>1.0-SNAPSHOT</version>
             <type>pom</type>
             <scope>import</scope>
         </dependency>
     </dependencies>
</dependencyManagement>

配置 build 标签用于欠缺插件 plugins，其中蕴含 maven-compiler-plugin 和 maven-resources-plugin

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <delimiters>
                        <delimiter>@</delimiter>
                    </delimiters>
                    <useDefaultDelimiters>false</useDefaultDelimiters>
                </configuration>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>src/main/webapp</directory>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
        </resources>
    </build>

配置 profiles 环境变量标签，用于不便打包切换，本狗设置了 local、dev、prod 三种环境

 <profiles>
     <profile>
         <id>local</id>
         <properties>
             <spring.active>local</spring.active>
         </properties>
         <activation>
             <activeByDefault>true</activeByDefault>
         </activation>
     </profile>
     <profile>
         <id>dev</id>
         <properties>
             <spring.active>dev</spring.active>
         </properties>
     </profile>
     <profile>
         <id>prod</id>
         <properties>
             <spring.active>prod</spring.active>
         </properties>
     </profile>
 </profiles>

操作可在 IDEA 右上角不便切换环境

💥切记肯定被动 Reload 一下 Maven 依赖
💥切记肯定被动 Reload 一下 Maven 依赖
💥切记肯定被动 Reload 一下 Maven 依赖

在 chat-boot-main 模块中退出启动类，在 src/main/java 下右键 New=>Java Class

录入启动类名 ChatApplication

欠缺 ChatApplication 启动类代码

package net.javadog.chat;

import com.github.xiaoymin.knife4j.spring.annotations.EnableKnife4j;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.env.Environment;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * @author: hdx
 * @Date: 2023-01-28 11:24
 * @version: 1.0
 **/
@SpringBootApplication
@ServletComponentScan
@Slf4j
@EnableSwagger2
@EnableKnife4j
public class ChatApplication {public static void main(String[] args) throws UnknownHostException {
        // 启动类
        ConfigurableApplicationContext application = SpringApplication.run(ChatApplication.class, args);
        // 打印根底信息
        info(application);
    }

    static void info(ConfigurableApplicationContext application) throws UnknownHostException {Environment env = application.getEnvironment();
        String ip = InetAddress.getLocalHost().getHostAddress();
        String port = env.getProperty("server.port");
        String active = env.getProperty("spring.profiles.active");
        String contextPath = env.getProperty("server.servlet.context-path");
        if (contextPath == null) {contextPath = "";}
        log.info("\n----------------------------------------------------------\n\t" +
                "欢送拜访  \thttps://blog.javadog.net\n\t" +
                "示例程序【" + active + "】环境已启动! 地址如下:\n\t" +
                "Local: \t\thttp://localhost:" + port + contextPath + "\n\t" +
                "External: \thttp://" + ip + ':' + port + contextPath + '\n' +
                "Swagger 文档: \thttp://" + ip + ":" + port + contextPath + "/doc.html\n" +
                "----------------------------------------------------------");
    }
}

配置 application.yml 文件

application.yml

#============================#
# server 配置
#============================#
server:
  port: 82
  max-http-header-size: 10240
  servlet:
    context-path: /chat/v1

#============================#
# spring 配置
#============================#
spring:
  application:
    # 利用名
    name: chat
  profiles:
    active: @spring.active@
  servlet:
    multipart:
      max-request-size: 100MB
      max-file-size: 100MB
  jackson:
    time-zone: GMT+8
    date-format: yyyy-MM-dd HH:mm:ss.SSS
    locale: zh_CN
    serialization:
      # 格式化输入
      indent_output: false
  main:
    allow-circular-references: true
    #解决 swagger 版本门路不兼容问题
  mvc:
    pathmatch:
      matching-strategy: ant_path_matcher

#============================#
# mybatisplus 配置
#============================#
mybatis-plus:
  mapper-locations: classpath:mapper/*.xml
  configuration:
    map-underscore-to-camel-case: true
    cache-enabled: true
    lazy-loading-enabled: true
    multiple-result-sets-enabled: true
    log-impl: org.apache.ibatis.logging.nologging.NoLoggingImpl
  global-config:
    banner: false
    db-config:
      id-type: assign_id
      table-underline: true
    enable-sql-runner: true
      #数据库类型
    db-type: MYSQL
  configuration-properties:
    prefix:
    #如果数据库为 postgresql，则须要配置为 blobType: BINARY
    blobType: BLOB
    #如果数据库为 oracle 或 mssql，则须要配置为 boolValue: 1
    boolValue: true

#============================#
# logging 配置
#============================#
logging:
  level:
    root: info
  file:
    path: /root/javadog/chat/logs/${spring.application.name}/
    name: ${spring.application.name}
  logback:
    rollingpolicy:
      max-history: 7
      max-file-size: 10MB

#============================#
# file 配置
#============================#
file:
  # 动态附件前缀
  static-prefix: attach
  # 上传的文件对外裸露的拜访门路
  access-path-pattern: /${file.static-prefix}/**
  # 文件上传目录
  upload-folder: /root/javadog/chat/
  # 文件上传最大
  max-post-size: 10

application-local.yml

# 服务配置
server:
  port: 8001
  max-http-header-size: 10240

# Mysql 数据库
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/chat-boot?autoReconnect=true&useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=CONVERT_TO_NULL&useSSL=false&serverTimezone=CTT&nullCatalogMeansCurrent=true
    username: root
    password: root
  redis:
    host: localhost
    port: 6379
    password:

application-dev.yml

# 服务配置
server:
  port: 7001
  max-http-header-size: 10240

# mybatisplus 配置
mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

application-prod.yml

# 服务配置
server:
  port: 8005

🌊顺便加一下 logback-spring.xml 日志文件

<?xml version="1.0" encoding="UTF-8" ?>
<configuration scan="true" scanPeriod="60 seconds" debug="false">
    <conversionRule conversionWord="clr" converterClass="org.springframework.boot.logging.logback.ColorConverter"/>
    <conversionRule conversionWord="wex"
                    converterClass="org.springframework.boot.logging.logback.WhitespaceThrowableProxyConverter"/>
    <conversionRule conversionWord="wEx"
                    converterClass="org.springframework.boot.logging.logback.ExtendedWhitespaceThrowableProxyConverter"/>
    <property name="CONSOLE_LOG_PATTERN"
              value="${CONSOLE_LOG_PATTERN:-%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:-}){magenta} %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>
    <property name="FILE_LOG_PATTERN"
              value="${FILE_LOG_PATTERN:-%d{yyyy-MM-dd HH:mm:ss.SSS} ${LOG_LEVEL_PATTERN:-%5p} ${PID:-} --- [%t] %-40.40logger{39} : %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>

    <springProperty scope="context" name="application.name" source="spring.application.name" defaultValue="javadog"/>
    <springProperty scope="context" name="logging.path" source="logging.file.path" defaultValue="logs"/>
    <springProperty scope="context" name="logging.file.max-size" source="logging.logback.rollingpolicy.max-size"
                    defaultValue="10MB"/>
    <springProperty scope="context" name="logging.file.max-history" source="logging.logback.rollingpolicy.max-history"
                    defaultValue="30"/>
    <contextName>${application.name}</contextName>

    <springProfile name="dev,prod">
        <!-- 输入到控制台 -->
        <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
            <encoder>
                <pattern>${CONSOLE_LOG_PATTERN}</pattern>
            </encoder>
        </appender>
        <root level="info">
            <appender-ref ref="console"/>
        </root>
    </springProfile>

    <springProfile name="dev,test,prod">
        <!-- 输入到文件 -->
        <appender name="file-info" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <file>${logging.path}/info/${application.name}-info.log</file>
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                <fileNamePattern>${logging.path}/info/${application.name}-info.%d{yyyy-MM-dd}.%i.log</fileNamePattern>

                <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                    <maxFileSize>${logging.file.max-size}</maxFileSize>
                </timeBasedFileNamingAndTriggeringPolicy>
                <!-- 只保留最近 n 天的日志 -->
                <maxHistory>${logging.file.max-history}</maxHistory>
            </rollingPolicy>
            <!-- 追加形式记录日志 -->
            <append>true</append>
            <encoder>
                <pattern>${FILE_LOG_PATTERN}</pattern>
            </encoder>
        </appender>
        <appender name="file-warn" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <filter class="ch.qos.logback.classic.filter.LevelFilter">
                <level>warn</level>
                <onMatch>ACCEPT</onMatch>
                <onMismatch>DENY</onMismatch>
            </filter>
            <file>${logging.path}/warn/${application.name}-warn.log</file>
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                <fileNamePattern>${logging.path}$/warn/${application.name}-warn.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
                <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                    <maxFileSize>${logging.file.max-size}</maxFileSize>
                </timeBasedFileNamingAndTriggeringPolicy>
                <!-- 只保留最近 n 天的日志 -->
                <maxHistory>${logging.file.max-history}</maxHistory>
            </rollingPolicy>
            <encoder>
                <pattern>${FILE_LOG_PATTERN}</pattern>
            </encoder>
        </appender>
        <appender name="file-error" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <filter class="ch.qos.logback.classic.filter.LevelFilter">
                <level>error</level>
                <onMatch>ACCEPT</onMatch>
                <onMismatch>DENY</onMismatch>
            </filter>
            <file>${logging.path}/error/${application.name}-error.log</file>
            <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
                <fileNamePattern>${logging.path}/error/${application.name}-error.%d{yyyy-MM-dd}.%i.log</fileNamePattern>
                <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
                    <maxFileSize>${logging.file.max-size}</maxFileSize>
                </timeBasedFileNamingAndTriggeringPolicy>
                <!-- 只保留最近 n 天的日志 -->
                <maxHistory>${logging.file.max-history}</maxHistory>
            </rollingPolicy>
            <encoder>
                <pattern>${FILE_LOG_PATTERN}</pattern>
            </encoder>
        </appender>

        <root level="INFO">
            <appender-ref ref="file-info"/>
            <appender-ref ref="file-warn"/>
            <appender-ref ref="file-error"/>
        </root>
    </springProfile>

</configuration>

启动一下我的项目试试，启动如下证实胜利。如果报错少依赖请再拉一下 Maven 依赖！！！

右击我的项目 chat-boot，new ->Moudle 新建模块 chat-boot-module

填写子模块名 chat-boot-module，而后查看对应 GAV，点击 Finish

生成子模块 chat-boot-module 如下图

删除 chat-boot-module 下无用文件及目录，如 src 目录，删除无用目录如下

自此内部大框架初步搭建胜利

欠缺 chat-boot-module 下 pom.xml 依赖，如 lombok，web 等必要依赖

<?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">
    <parent>
        <artifactId>chat-boot</artifactId>
        <groupId>net.javadog.chat</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>chat-boot-module</artifactId>
    <packaging>pom</packaging>
    <modules>
        <module>chat-boot-common</module>
        <module>chat-boot-controller</module>
        <module>chat-boot-dao</module>
        <module>chat-boot-dto</module>
        <module>chat-boot-entity</module>
        <module>chat-boot-service</module>
    </modules>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>net.javadog.chat</groupId>
                <artifactId>chat-boot-dependencies</artifactId>
                <version>${project.parent.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <!-- web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--WxJava - 微信开发 Java SDK-->
        <dependency>
            <groupId>com.github.binarywang</groupId>
            <artifactId>weixin-java-miniapp</artifactId>
        </dependency>
        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <!--hutool-->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
        </dependency>
        <!--swagger2-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
        </dependency>
        <!--swagger-ui-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
        </dependency>
        <!-- 整合 Knife4j-->
        <dependency>
            <groupId>com.github.xiaoymin</groupId>
            <artifactId>knife4j-spring-boot-starter</artifactId>
        </dependency>
        <!-- 整合 Shiro 平安框架 -->
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
        </dependency>
        <!--jwt-->
        <dependency>
            <groupId>com.auth0</groupId>
            <artifactId>java-jwt</artifactId>
        </dependency>
        <!--mybatis-plus-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
    </dependencies>

</project>

肯定要从新拉取依赖！
肯定要从新拉取依赖！
肯定要从新拉取依赖！

目前本狗分为如下 6 层

common- 共通层
controller- 控制器层
dao- 数据长久层
dto- 数据传输对象层
entity- 实体层
service- 业务逻辑层

顺次依照上述增加模块形式进行新增子模块，本狗如下示例一个，其余都如法炮制

右击我的项目 chat-boot-module，new ->Moudle 新建模块 chat-boot-common

肯定看清楚父模块是否正确
肯定看清楚父模块是否正确
肯定看清楚父模块是否正确

确认父级模块后，点击 Finish，生成 chat-boot-common 模块

顺次依照上述办法，新建其余模块

chat-boot-controller模块

chat-boot-dao模块

chat-boot-dto模块

chat-boot-entity模块

chat-boot-service模块

总体模块雏形根本实现

模仿失常 前端申请 到后盾服务调用过程，进行理论代码补充

在 chat-boot-entity 下新建实体类 User，在 src/main/java 下右键 New=>Java Class，录入包名及类名

package net.javadog.chat.entity;

import lombok.Data;

/**
 * @author: hdx
 * @Date: 2023-01-28 14:26
 * @version: 1.0
 **/
@Data
public class User {

    private Long id;

    private String username;

    private String idCard;
}

在 chat-boot-dto 下新建目 request 和 response，别离代表 申请传输对象和返回传输对象，并别离在目录下创立 UserRequest.java 和 UserResponse.java

package net.javadog.chat.request;

import lombok.Data;

/**
 * @author: hdx
 * @Date: 2023-01-28 14:59
 * @version: 1.0
 **/
@Data
public class UserRequest {

    private Long id;

    private String username;
}

package net.javadog.chat.response;

import lombok.Data;

/**
 * @author: hdx
 * @Date: 2023-01-28 14:59
 * @version: 1.0
 **/
@Data
public class UserResponse {

    private Long id;

    private String username;
}

在 chat-boot-dao 下批改 chat-boot-dao 模块下批改 pom.xml 文件依赖，引入 chat-boot-entity; 并增对应 UserMapper.java

package net.javadog.chat.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import net.javadog.chat.entity.User;

/**
 * 用户 mapper
 *
 * @author: hdx
 * @Date: 2023-01-10 11:43
 * @version: 1.0
 **/
public interface UserMapper extends BaseMapper<User> {
}

<?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">
    <parent>
        <artifactId>chat-boot-module</artifactId>
        <groupId>net.javadog.chat</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>chat-boot-dao</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>net.javadog.chat</groupId>
            <artifactId>chat-boot-entity</artifactId>
            <version>${project.parent.version}</version>
        </dependency>
    </dependencies>

</project>

在 chat-boot-service 下新建目录 service 和 impl，并在对应目录下新建 UserService.java 和 UserServiceImpl.java，并批改 chat-boot-service 模块下批改 pom.xml 文件依赖，引入 chat-boot-dto,chat-boot-dao

package net.javadog.chat.service;

import com.baomidou.mybatisplus.extension.service.IService;
import net.javadog.chat.entity.User;

/**
 * 用户接口
 *
 * @author: hdx
 * @Date: 2023-01-10 11:53
 * @version: 1.0
 **/
public interface UserService extends IService<User> {

}

package net.javadog.chat.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import net.javadog.chat.entity.User;
import net.javadog.chat.mapper.UserMapper;
import net.javadog.chat.service.UserService;
import org.springframework.stereotype.Service;

/**
 * 用户接口实现类
 *
 * @author: hdx
 * @Date: 2023-01-10 11:55
 * @version: 1.0
 **/
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {}

<?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">
    <parent>
        <artifactId>chat-boot-module</artifactId>
        <groupId>net.javadog.chat</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>chat-boot-service</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>net.javadog.chat</groupId>
            <artifactId>chat-boot-dao</artifactId>
            <version>${project.parent.version}</version>
        </dependency>
        <dependency>
            <groupId>net.javadog.chat</groupId>
            <artifactId>chat-boot-dto</artifactId>
            <version>${project.parent.version}</version>
        </dependency>
    </dependencies>

</project>

在 chat-boot-controller 创立 UserController.java, 并批改 chat-boot-controller 模块下批改 pom.xml 文件依赖，引入 chat-boot-dto,chat-boot-service

package net.javadog.chat.controller;

import cn.hutool.core.bean.BeanUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import net.javadog.chat.entity.User;
import net.javadog.chat.request.UserRequest;
import net.javadog.chat.response.UserResponse;
import net.javadog.chat.service.UserService;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;

/**
 * 用户控制器
 *
 * @author: hdx
 * @Date: 2022-12-07 15:48
 * @version: 1.0
 **/
@Api(tags = "用户控制器")
@RestController
@RequestMapping("/user")
public class UserController {

    @Resource
    private UserService userService;

    @ApiOperation(value = "用户详情", notes = "用户详情")
    @GetMapping
    public UserResponse detail(UserRequest userRequest){UserResponse userResponse = new UserResponse();
        User user = userService.getById(userRequest.getId());
        BeanUtil.copyProperties(user, userResponse);
        return userResponse;
    }

}

🎯重要补充
1. 切记批改 chat-boot-main 下的 pom.xml 依赖，将 chat-boot-controller 模块退出
2. 切记批改 chat-boot-main 下的 pom.xml 依赖，将 chat-boot-dao 模块退出
3. 切记批改启动类 ChatApplication 中退出 @MapperScan 注解

<?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">
    <parent>
        <artifactId>chat-boot</artifactId>
        <groupId>net.javadog.chat</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>chat-boot-main</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>net.javadog.chat</groupId>
                <artifactId>chat-boot-dependencies</artifactId>
                <version>1.0-SNAPSHOT</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <!-- web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <!--swagger2-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
        </dependency>
        <!--swagger-ui-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
        </dependency>
        <!-- swagger 接口文档 -->
        <dependency>
            <groupId>com.github.xiaoymin</groupId>
            <artifactId>knife4j-spring-boot-starter</artifactId>
        </dependency>

        <!-- controller -->
        <dependency>
            <groupId>net.javadog.chat</groupId>
            <artifactId>chat-boot-controller</artifactId>
            <version>${project.parent.version}</version>
        </dependency>
        <!-- dao -->
        <dependency>
            <groupId>net.javadog.chat</groupId>
            <artifactId>chat-boot-dao</artifactId>
            <version>${project.parent.version}</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <delimiters>
                        <delimiter>@</delimiter>
                    </delimiters>
                    <useDefaultDelimiters>false</useDefaultDelimiters>
                </configuration>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>src/main/webapp</directory>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
        </resources>
    </build>

    <profiles>
        <profile>
            <id>local</id>
            <properties>
                <spring.active>local</spring.active>
            </properties>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
        </profile>
        <profile>
            <id>dev</id>
            <properties>
                <spring.active>dev</spring.active>
            </properties>
        </profile>
        <profile>
            <id>prod</id>
            <properties>
                <spring.active>prod</spring.active>
            </properties>
        </profile>
    </profiles>
</project>

package net.javadog.chat;

import com.github.xiaoymin.knife4j.spring.annotations.EnableKnife4j;
import lombok.extern.slf4j.Slf4j;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.env.Environment;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * @author: hdx
 * @Date: 2023-01-28 11:24
 * @version: 1.0
 **/
@SpringBootApplication
@ServletComponentScan
@Slf4j
@EnableSwagger2
@EnableKnife4j
@MapperScan(basePackages = {"net.javadog.chat.mapper"})
public class ChatApplication {public static void main(String[] args) throws UnknownHostException {
        // 启动类
        ConfigurableApplicationContext application = SpringApplication.run(ChatApplication.class, args);
        // 打印根底信息
        info(application);
    }

    static void info(ConfigurableApplicationContext application) throws UnknownHostException {Environment env = application.getEnvironment();
        String ip = InetAddress.getLocalHost().getHostAddress();
        String port = env.getProperty("server.port");
        String active = env.getProperty("spring.profiles.active");
        String contextPath = env.getProperty("server.servlet.context-path");
        if (contextPath == null) {contextPath = "";}
        log.info("\n----------------------------------------------------------\n\t" +
                "欢送拜访  \thttps://blog.javadog.net\n\t" +
                "示例程序【" + active + "】环境已启动! 地址如下:\n\t" +
                "Local: \t\thttp://localhost:" + port + contextPath + "\n\t" +
                "External: \thttp://" + ip + ':' + port + contextPath + '\n' +
                "Swagger 文档: \thttp://" + ip + ":" + port + contextPath + "/doc.html\n" +
                "----------------------------------------------------------");
    }
}

模仿失常 前端申请 到后盾服务调用过程，进行理论代码补充

DROP TABLE IF EXISTS `user`;
CREATE TABLE `user`  (`id` bigint(20) NOT NULL COMMENT 'id',
  `username` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '用户名',
  `id_card` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '身份证',
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES (1, 'JavaDog', '123123');

浏览器拜访 http://localhost:8001/chat/v1/user?id=1

测试胜利如下图所示

以上示例只是简略示范分层思路，其中代码逻辑实现形式有很多种，大家选取实用本人就好，心愿本人的思路能对大家有帮忙

如遇短少依赖状况，肯定要从新拉取依赖！

此生两悔，悔遇见你，更悔未早遇见你，珍惜当下领有，勿念今日美妙。

前言

🍊原因

⏲️本文浏览时长

🎯次要指标

👨‍🎓试用人群

🎁疾速链接

🍩水图

注释

🥫1.IDEA 新建我的项目

🌭2. 创立子模块 -dependencies(依赖层)

🎯重点

🍪3. 创立子模块 -main(主启动层)

🎯重点

🍇4. 创立子模块 -module(模块层)

🍉5. 创立 chat-boot-module 模块下对应性能分层

🍧6. 理论流程填充

🦔7. 示例 DB 更新

🧩8. 拜访测试

总结

写在最初

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