springboot-FilterRegistrationBean

主要用来对servlet filter进行自定义，比如设置order。

先写一个普通的filter：

public class FilterDemo implements Filter {
    private final Logger log = LoggerFactory.getLogger(FilterDemo.class);  

    @Override
    public void destroy() {
        log.info("" + getClass() + " destroy");  

    }  

    @Override
    public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException {
        log.info( " doFilter " );
        arg2.doFilter(arg0, arg1);  

    }  

    @Override
    public void init(FilterConfig arg0) throws ServletException {
        log.info("" + getClass() + " init");  

    }  

}  

配置如下：

@Configuration
public class WebComponent2Config   {  

    @Bean
    public FilterRegistrationBean filterDemo3Registration() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(filterDemo3());
        registration.addUrlPatterns("/*");
        registration.setName("filterDemo3");
        registration.setOrder();
        return registration;
    }  

    @Bean
    public FilterRegistrationBean filterDemo4Registration() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(filterDemo4());
        registration.addUrlPatterns("/*");
        registration.setName("filterDemo4");
        registration.setOrder();
        return registration;
    }  

    @Bean
    public Filter filterDemo3() {
        return new FilterDemo3();
    }  

    @Bean
    public Filter filterDemo4() {
        return new FilterDemo4();
    }  

}