spring 普通类注入为null，通过自定义SpringUtils解决

 package com.jathams.spring;

 import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 //定义为final类
 @Component
 public final class SpringUtils implements BeanFactoryPostProcessor {
     //静态
     private static ConfigurableListableBeanFactory beanFactory; // Spring应用上下文环境

     @Override
     public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)
             throws BeansException {
         SpringUtils.beanFactory = beanFactory;
     }

     /**
      * 获取对象
      *
      * @param name
      * @return Object 一个以所给名字注册的bean的实例
      * @throws org.springframework.beans.BeansException
      *
      */
     @SuppressWarnings("unchecked")
     public static <T> T getBean(String name) throws BeansException {
         return (T) beanFactory.getBean(name);
     }

     /**
      * 获取类型为requiredType的对象
      *
      * @param clz
      * @return
      * @throws org.springframework.beans.BeansException
      *
      */
     public static <T> T getBean(Class<T> clz) throws BeansException {
         @SuppressWarnings("unchecked")
         T result = (T) beanFactory.getBean(clz);
         return result;
     }

     /**
      * 如果BeanFactory包含一个与所给名称匹配的bean定义，则返回true
      *
      * @param name
      * @return boolean
      */
     public static boolean containsBean(String name) {
         return beanFactory.containsBean(name);
     }

     /**
      * 判断以给定名字注册的bean定义是一个singleton还是一个prototype。
      * 如果与给定名字相应的bean定义没有被找到，将会抛出一个异常（NoSuchBeanDefinitionException）
      *
      * @param name
      * @return boolean
      * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
      *
      */
     public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
         return beanFactory.isSingleton(name);
     }

     /**
      * @param name
      * @return Class 注册对象的类型
      * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
      *
      */
     public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {
         return beanFactory.getType(name);
     }

     /**
      * 如果给定的bean名字在bean定义中有别名，则返回这些别名
      *
      * @param name
      * @return
      * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
      *
      */
     public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
         return beanFactory.getAliases(name);
     }

 }

使用

 ProductionMonthSettleService monthSettleService = SpringUtils.getBean(ProductionMonthSettleService.class);