@FilterRegistration和@ServletRegistration注解

前言

@FilterRegistration和@ServletRegistration注解是Springboot3.5.x版本之后提供的注解，使用 @ServletRegistration 注册 Servlet，使用 @FilterRegistration注册Filter

注解使用

@FilterRegistration使用

创建一个Springboot3.5.x版本新属性，然后

@Slf4j
public class TestFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        log.info("TestFilter:{{}}", request.getRequestURI());

        //执行
        filterChain.doFilter(servletRequest, servletResponse);
    }

    @Override
    public void destroy() {

    }
}

@Configuration(proxyBeanMethods = false)
public class FilterConfiguration {

    @Bean
    @FilterRegistration(name = "encoding-filter", urlPatterns = "/*", order = 0)
    public TestFilter encodingFilter() {
        return new TestFilter();
    }
    

}

输出结果为

@ServletRegistration使用

public class MyServlet extends HttpServlet {
 
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.getOutputStream().println("hello world");
    }
}

@Configuration(proxyBeanMethods = false)
public class FilterConfiguration {
    


    @Bean
    @ServletRegistration(name = "encoding-filter1", order = 0)
    public MyServlet myServlet() {
        return new MyServlet();
    }

}

总结

Springboot3.5.x版本之后，更新了许多优秀属性，可以用用看