将单个Spring bean实例注入到实用程序类的静态变量中

public class UtilityClass implements ApplicationContextAware {
    private static ApplicationContext applicationContext;
    private static SomeBean someBean;

    @Override
    public void setApplicationContext(ApplicationContext context) throws BeansException {
        applicationContext = context;
    }

    public static void doSomething() {
        // 使用注入的Spring bean实例执行操作
        someBean.doSomething();
    }

    public static void main(String[] args) {
        // 调用实用程序类的方法
        UtilityClass.doSomething();
    }
}

<bean id="utilityClass" class="com.example.UtilityClass" />

<bean id="someBean" class="com.example.SomeBean" />

<bean class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
    <property name="staticMethod" value="com.example.UtilityClass.setApplicationContext" />
    <property name="arguments">
        <list>
            <ref bean="utilityClass" />
        </list>
    </property>
</bean>

<bean class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
    <property name="targetObject" ref="utilityClass" />
    <property name="targetMethod" value="doSomething" />
</bean>