解决SpringMvc中普通类注入Service为null的问题

SpringMvc中普通类注入Service为null场景：

使用Quartz定时器时,普通的java类需要注入spring的service类,在调用时报错!

解决方式：

    /**     * 定时获取课程的service     */    @Autowired    protected QuartzGetCourseService quartzGetCourseService = (QuartzGetCourseService) SpringContextUtil            .getBean("quartzGetCourseService");

import org.springframework.beans.BeansException;import org.springframework.beans.factory.NoSuchBeanDefinitionException;import org.springframework.context.ApplicationContext;import org.springframework.context.ApplicationContextAware;import org.springframework.stereotype.Component; /** * 在Spring 注解中，普通类获取@Service标记的方法或者bean对象 * */@Componentpublic class SpringContextUtil implements ApplicationContextAware {    private static ApplicationContext applicationContext = null;     @Override    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {        SpringContextUtil.applicationContext = applicationContext;    }     public static ApplicationContext getApplicationContext() {        return applicationContext;    }     /**     * 注意 bean name默认 = 类名(首字母小写) 例如: A8sClusterDao = getBean("a8sClusterDao")     *     * @param name     * @return     * @throws BeansException     */    public static Object getBean(String name) throws BeansException {        return applicationContext.getBean(name);    }     /**     * 根据类名获取到bean     *     * @param <T>     * @param clazz     * @return     * @throws BeansException     */    @SuppressWarnings("unchecked")    public static <T> T getBeanByName(Class<T> clazz) throws BeansException {        try {            char[] cs = clazz.getSimpleName().toCharArray();            cs[0] += 32;// 首字母大写到小写            return (T) applicationContext.getBean(String.valueOf(cs));        }        catch (Exception e) {            e.printStackTrace();            return null;        }    }     public static boolean containsBean(String name) {        return applicationContext.containsBean(name);    }     public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {        return applicationContext.isSingleton(name);    } }

调用结束，测试可以获取Service.

spring之工具类使用service注入

一般需要在一个工具类中使用@Autowired 注解注入一个service。但是由于工具类方法一般都写成static，所以直接注入就存在问题。

栗子:

@Component  public class SmsController {        private static Logger logger = LoggerFactory.getLogger(SmsController.class);        @Autowired      private MessagesInfoService messagesInfoService;      private static SmsController smsController;               @PostConstruct      public void init() {          smsController = this;          smsController.messagesInfoService = this.messagesInfoService;        }        /**     *短信历史查询接口(查询某个时间段发送的短信)     */    @RequestMapping(value = "/queryMessage",method = RequestMethod.GET)    public ModelAndView queryMessage{         pager = messagesInfoService.findPager(map,5,pIndex);        ModelAndView modelAndView = new ModelAndView("manage/jgdxgl/jgdx_qm");        List<MessagesInfo> list = pager.getItem();        modelAndView.addObject("pager",pager);        modelAndView.addObject("list",list);        return modelAndView    }      }  

以上为个人经验，希望能给大家一个参考，也希望大家多多支持。

有的旅行时为了寻找逝去的年华，重温青春的惆怅。