SpringBoot中在除controller以外注入service-过滤器中注入

一般我们都是在controller层注入service那么如何在过滤器中注入service呢一般使用过滤器在启动类中添加如下代码

 1 @SpringBootApplication
 2 @MapperScan("com.cmbchina.ccd.itpm.baffle.dao")
 3 
 4 public class BaffleApplication extends SpringBootServletInitializer {
 5     @Override
 6     protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
 7         return builder.sources(BaffleApplication.class);
 8     }
 9 
10     public static void main(String[] args) {
11         SpringApplication.run(BaffleApplication.class, args);
12     }
13     //配置过滤器
14     @Bean
15     public FilterRegistrationBean filterRegistrationBean(){
16         FilterRegistrationBean filterFilterRegistrationBean = new FilterRegistrationBean(new UrlFilter());
17         filterFilterRegistrationBean.addUrlPatterns("/*");
18         return filterFilterRegistrationBean;
19     }
20 
21 
22 }

这样的话启动的时候就会加载这个过滤器要是直接在过滤器中直接@Autowired 会出先空指针的我们可以采用下面的方法

 1 @Component
 2 public class UrlFilter implements Filter {
 3     @Autowired
 4     private UrlServicer urlServicer;
 5    /* private static  Logger logger= LoggerFactory.getLogger(UrlFilter .class);*/
 6     @Override
 7     public void init(FilterConfig filterConfig) throws ServletException {
 8         ServletContext sc = filterConfig.getServletContext();
 9         WebApplicationContext cxt = WebApplicationContextUtils.getWebApplicationContext(sc);
10         if(cxt != null && cxt.getBean(UrlServicer.class) != null && urlServicer == null) {
11             urlServicer =cxt.getBean(UrlServicer.class);
12         }
13     }

在过滤器加上@Component注解在init方法中初始化你要注入的service就可以了

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SpringBoot中在除controller以外注入service-过滤器中注入

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