spring基础环境搭建

4核心+1依赖
core、beans、context、expression
依赖commons.logging

<dependency>      <groupId>org.springframework</groupId>      <artifactId>spring-core</artifactId>      <version>${org.springframework.version}</version>    </dependency>    <!-- Expression Language (depends on spring-core) Define this if you use        Spring Expression APIs (org.springframework.expression.*) -->    <dependency>      <groupId>org.springframework</groupId>      <artifactId>spring-expression</artifactId>      <version>${org.springframework.version}</version>    </dependency>    <!-- Bean Factory and JavaBeans utilities (depends on spring-core) Define        this if you use Spring Bean APIs (org.springframework.beans.*) -->    <dependency>      <groupId>org.springframework</groupId>      <artifactId>spring-beans</artifactId>      <version>${org.springframework.version}</version>    </dependency>    <!-- Application Context (depends on spring-core, spring-expression, spring-aop,            spring-beans) This is the central artifact for Spring's Dependency Injection            Container and is generally always defined -->    <dependency>      <groupId>org.springframework</groupId>      <artifactId>spring-context</artifactId>      <version>${org.springframework.version}</version>    </dependency>