一、项目背景
项目做的是一个线上婚庆服务平台，客户可以在线上对主持人以及策划团队进行选择，该项目包含后台管理以及客户网站两个模块，我将这两个模块创建在同一个父项目中，将父项目声明为pom用来管理资源，两个模块用继承资源。
二、dependencyManagement
父项目
4.0.0 tingyu_project 1.0-SNAPSHOT tingyu_project pom 8.0.11 3.5.2 5.2.2.RELEASE 2.0.4 1.7.25 1.2 3.1.0 2.2 4.12 2.9.9 1.8 1.8 5.7.0 commons-io commons-io 2.5 org.springframework spring-context ${spring-version} org.springframework spring-jdbc ${spring-version} org.springframework spring-test ${spring-version} org.aspectj aspectjweaver 1.9.4 org.springframework spring-webmvc ${spring-version} org.mybatis mybatis ${mybatis-version} mysql mysql-connector-java ${mysql-version} org.mybatis mybatis-spring ${mybatis-spring-version} com.fasterxml.jackson.core jackson-databind ${jackson-version} org.slf4j slf4j-log4j12 ${slf4j-version} org.projectlombok lombok-maven-plugin 1.18.12.0 provided junit junit ${junit-version} test javax.servlet javax.servlet-api ${servlet-api-version} provided javax.servlet.jsp jsp-api ${jsp-version} provided jstl jstl ${jstl-version} org.apache.logging.log4j log4j-core 2.9.0 org.apache.logging.log4j log4j-api 2.5 commons-fileupload commons-fileupload 1.3.2
后台管理模块
tingyu_project com.codeXie 1.0-SNAPSHOT 4.0.0 com.codeXie tingyu_backend 1.0-SNAPSHOT tingyu_backend backend_pojo backend_service backend_mapper backend_web pom commons-io commons-io org.springframework spring-context org.springframework spring-jdbc org.springframework spring-test org.aspectj aspectjweaver org.springframework spring-webmvc org.mybatis mybatis mysql mysql-connector-java org.mybatis mybatis-spring com.fasterxml.jackson.core jackson-databind org.slf4j slf4j-log4j12 org.projectlombok lombok-maven-plugin provided junit junit test javax.servlet javax.servlet-api provided javax.servlet.jsp jsp-api provided jstl jstl org.apache.logging.log4j log4j-core org.apache.logging.log4j log4j-api commons-fileupload commons-fileupload
若在子模块中也声明了dependenceManagement，则必须声明依赖的版本号，否则子模块无法执行maven指令，会报错missing version的错误(版本号缺失)
