pom.xml

<!--spring-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>5.2.6.RELEASE</version>
    </dependency>
    <!--spring整合junit-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>5.2.6.RELEASE</version>
      <scope>test</scope>
    </dependency>
    <!--spring整合web环境-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>5.2.6.RELEASE</version>
    </dependency>
<!--java工具类，SpringUtils-->
    <dependency>
      <groupId>cn.hutool</groupId>
      <artifactId>hutool-all</artifactId>
      <version>5.3.8</version>
    </dependency>

配置类

MyWebApplicationInitializer.java

// 等价于web.xml配置文件
public class MyWebApplicationInitializer implements WebApplicationInitializer {
    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        // Load Spring web application configuration
        AnnotationConfigWebApplicationContext ac = new AnnotationConfigWebApplicationContext();
        ac.register(SpringConfig.class);
        ac.refresh();
        StaticLog.info("初始化spring容器");
    }
}

spring配置类

// spring配置类
@Configuration
@ComponentScan(value = {"cn.itcast","cn.hutool.extra.spring"}) //cn.itcast 自己程序的包，
public class SpringConfig {

}

使用

Demo2 testDemo = SpringUtil.getBean("testDemo");