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

									 *

									 */

									@Component

									public 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

									    }      

									}