前言：
此刻咱们对“net五层架构”大体比较注重，各位老铁们都想要了解一些“net五层架构”的相关内容。那么小编同时在网络上收集了一些有关“net五层架构””的相关资讯，希望朋友们能喜欢，姐妹们一起来学习一下吧！前言缘由
经常看到网上很多优秀的开源项目中，代码简洁，模块分层完美。反观自己代码层级混乱，，却不知如何整理分层。此文手把手教你一步一步创建模块，左手右手一个慢动作。结合本人实际开发及个人项目中分层思路的分享，大神请勿喷。
主要目标熟练掌握SpringBoot项目分层思路，丝滑拆分模块熟悉代码层级依赖，规范化管理模块分布手把手实战学习，理论实践相结合试用人群对于Springboot熟悉但是不知道合理分层小白有自己分层思路可以互相分享学习水图
下图反面教材，传统单体应用，结构臃肿
下图分层截选自本人的一个小项目，模块清晰，分工明确
我们要实现的小栗子的分层
正文1.IDEA新建项目
起名第一步，一个好名字,说不定是个好的开始
假如我们的项目是个聊天相关的项目，英文对应chat,所以定义项目名为chat-boot，其他的以此效仿
点击New->project
选择Maven项目，并选择合适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
删除后项目目录
修改pom.xml中依赖，增加spring-boot-starter-parent
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.3.1.RELEASE</version> </parent>复制代码2.创建子模块-dependencies(依赖层)
右击项目chat-boot，new ->Moudle新建模块chat-boot-dependencies
选择对应Module SDK版本，本人选择jdk1.8
填写子模块名 chat-boot-dependencies，然后检查对应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
完善chat-boot-dependencies下pom.xml依赖， 常用依赖放入，作为依赖主体，以下是本狗常用依赖，可酌情选择；记得把packaging改为pom
<?xml version="1.0" encoding="UTF-8"?><project xmlns="; xmlns:xsi="; xsi:schemaLocation=" ;> <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>${mybatis-plus.version}</version> </dependency> <!-- 数据库驱动,可根据自己需要自行删减，默认使用mysql --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${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>${weixin.version}</version> </dependency> <!--整合Shiro安全框架--> <dependency> <groupId>org.apache.shiro</groupId> <artifactId>shiro-spring</artifactId> <version>${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>复制代码重点此处用的标签是 dependencyManagement，
dependencyManagement只是声明依赖，并不实现引入，因此子项目需要显示的声明需要用的依赖。如果不在子项目中声明依赖，是不会从父项目中继承下来；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，那么会使用子项目中指定的jar版本。
3.创建子模块-main(主启动层)
右击项目chat-boot，new ->Moudle新建模块chat-boot-main
选择对应Module SDK版本，本狗选择jdk1.8，点击Next
填写子模块名 chat-boot-main，然后检查对应GAV，点击Finish
生成子模块chat-boot-main如下图
完善chat-boot-main模块下pom.xml中依赖
引入必要依赖完善profiles标签中环境相关配置build标签中插件
<?xml version="1.0" encoding="UTF-8"?><project xmlns="; xmlns:xsi="; xsi:schemaLocation=" ;> <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>复制代码重点配置引入依赖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>复制代码配置build标签用于完善插件plugins，其中包含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>复制代码配置profiles环境变量标签，用于方便打包切换，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>复制代码
操作可在IDEA右上角方便切换环境
切记一定主动Reload一下Maven依赖 切记一定主动Reload一下Maven依赖 切记一定主动Reload一下Maven依赖
在chat-boot-main模块中加入启动类，在src/main/java下右键New=>Java Class
录入启动类名ChatApplication
完善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@EnableKnife4jpublic class ChatApplication { public static void main(String[] args) throws UnknownHostException { // 启动类 ConfigurableApplicationContext application = SpringApplication.run(ChatApplication.class, args); // 打印基础信息 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" + "欢迎访问 \t\n\t" + "示例程序【" + active + "】环境已启动! 地址如下:\n\t" + "Local: \t\t; + port + contextPath + "\n\t" + "External: \t; + ip + ':' + port + contextPath + '\n' + "Swagger文档: \t; + ip + ":" + port + contextPath + "/doc.html\n" + "----------------------------------------------------------"); }}复制代码配置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: # 应用名 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: # 格式化输出 indent_output: false main: allow-circular-references: true #解决swagger版本路径不兼容问题 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，则需要配置为blobType: BINARY blobType: BLOB #如果数据库为oracle或mssql，则需要配置为boolValue: 1 boolValue: true#============================## logging 配置#============================#logging: level: root: info file: path: /root/javadog/chat/logs/${spring.application.name}/ name: ${spring.application.name} logback: rollingpolicy: max-history: 7 max-file-size: 10MB#============================## file 配置#============================#file: # 静态附件前缀 static-prefix: attach # 上传的文件对外暴露的访问路径 access-path-pattern: /${file.static-prefix}/** # 文件上传目录 upload-folder: /root/javadog/chat/ # 文件上传最大 max-post-size: 10复制代码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:复制代码
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复制代码
application-prod.yml
#服务配置server: port: 8005复制代码
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>${application.name}</contextName> <springProfile name="dev,prod"> <!--输出到控制台--> <appender name="console" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>${CONSOLE_LOG_PATTERN}</pattern> </encoder> </appender> <root level="info"> <appender-ref ref="console"/> </root> </springProfile> <springProfile name="dev,test,prod"> <!--输出到文件--> <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> <!-- 追加方式记录日志 --> <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>复制代码启动一下项目试试，启动如下证明成功。如果报错少依赖请再拉一下Maven依赖！！！
4.创建子模块-module(模块层)
右击项目chat-boot，new ->Moudle新建模块chat-boot-module
填写子模块名 chat-boot-module，然后检查对应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
自此外部大框架初步搭建成功
完善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="; xmlns:xsi="; xsi:schemaLocation=" ;> <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安全框架--> <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>复制代码一定要重新拉取依赖！ 一定要重新拉取依赖！ 一定要重新拉取依赖！
5.创建chat-boot-module模块下对应功能分层
目前本狗分为如下6层
common-共通层controller-控制器层dao-数据持久层dto-数据传输对象层entity-实体层service-业务逻辑层
依次按照上述添加模块方式进行新增子模块，本狗如下示例一个，其余都如法炮制
右击项目chat-boot-module，new ->Moudle新建模块chat-boot-common
一定看清楚父模块是否正确 一定看清楚父模块是否正确 一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
依次按照上述方法，新建其他模块
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
总体模块雏形基本完成
6.实际流程填充模拟正常前端请求到后台服务调用过程，进行实际代码补充
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 **/@Datapublic class User { private Long id; private String username; private String idCard;}复制代码在chat-boot-dto下新建目request和response，分别代表请求传输对象和返回传输对象，并分别在目录下创建UserRequest.java和UserResponse.java
package net.javadog.chat.request;import lombok.Data;/** * @author: hdx * @Date: 2023-01-28 14:59 * @version: 1.0 **/@Datapublic class UserRequest { private Long id; private String username;}复制代码package net.javadog.chat.response;import lombok.Data;/** * @author: hdx * @Date: 2023-01-28 14:59 * @version: 1.0 **/@Datapublic class UserResponse { private Long id; private String username;}复制代码在chat-boot-dao下修改chat-boot-dao模块下修改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> {}复制代码<?xml version="1.0" encoding="UTF-8"?><project xmlns="; xmlns:xsi="; xsi:schemaLocation=" ;> <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>复制代码在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，并修改chat-boot-service模块下修改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> {}复制代码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 **/@Servicepublic class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {}复制代码<?xml version="1.0" encoding="UTF-8"?><project xmlns="; xmlns:xsi="; xsi:schemaLocation=" ;> <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>复制代码在chat-boot-controller创建UserController.java,并修改chat-boot-controller模块下修改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; }}复制代码重要补充 1.切记修改chat-boot-main下的pom.xml依赖，将chat-boot-controller模块加入 2.切记修改chat-boot-main下的pom.xml依赖，将chat-boot-dao模块加入 3.切记修改启动类ChatApplication中加入@MapperScan注解
<?xml version="1.0" encoding="UTF-8"?><project xmlns="; xmlns:xsi="; xsi:schemaLocation=" ;> <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>复制代码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); // 打印基础信息 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" + "欢迎访问 \t\n\t" + "示例程序【" + active + "】环境已启动! 地址如下:\n\t" + "Local: \t\t; + port + contextPath + "\n\t" + "External: \t; + ip + ':' + port + contextPath + '\n' + "Swagger文档: \t; + ip + ":" + port + contextPath + "/doc.html\n" + "----------------------------------------------------------"); }}复制代码7.示例DB更新模拟正常前端请求到后台服务调用过程，进行实际代码补充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');复制代码8.访问测试
浏览器访问
测试成功如下图所示
总结
以上示例只是简单示范分层思路，其中代码逻辑实现方式有很多种，大家选取适用自己就好，希望自己的思路能对大家有帮助
如遇缺少依赖情况，一定要重新拉取依赖！
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标签： #net五层架构 #springboot项目架构分层
