Springboot实现过滤器有以下俩种方式，第一种方式俩步走，即向spring容器注册filter
第一种：
1.Filter过滤器具体实现类
@Component @Slf4j public class MyTestFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { log.info("[ {} ] 创建啦...", this.getClass().getSimpleName()); } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { log.info("[ {} ] 执行啦...", this.getClass().getSimpleName()); chain.doFilter(request, response); } @Override public void destroy() { log.info("[ {} ] 被摧毁啦...", this.getClass().getSimpleName()); } }
2.向spring容器注册filter
@Configuration public class FilterConfig { @Resource private MyTestFilter myTestFilter; @Bean public FilterRegistrationBean testFilterRegistration() { FilterRegistrationBean registration = new FilterRegistrationBean(myTestFilter); registration.addUrlPatterns("/filter/*"); registration.setName("testFilter"); registration.setOrder(1); return registration; } }
第二种：
通过@WebFilter 注解来配置
@Component @WebFilter(urlPatterns = "/filter/*", filterName = "myTestFilter") @Slf4 public class MyTestFilter implements Filter { @Override public void init(FilterConfig filterConfig) throws ServletException { log.info("[ {} ] 创建啦...", this.getClass().getSimpleName()); } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { log.info("[ {} ] 执行啦...", this.getClass().getSimpleName()); chain.doFilter(request, response); } @Override public void destroy() { log.info("[ {} ] 被摧毁啦...", this.getClass().getSimpleName()); } }
还需要在 SpringBootApplication 上使用@ServletComponentScan
注解后
Servlet可以直接通过@WebServlet注解自动注册
Filter可以直接通过@WebFilter注解自动注册
Listener可以直接通过@WebListener 注解自动注册
