【20180928】SpringBoot Filter添加Header头

这里是一些废话

• SpringBoot实现过滤器和SpringMVC上实现没有多大差别，主要的差别就是在过滤器注册上，SpringMVC是通过XML配置文件注册过滤器，而SpringBoot则是通过代码注解的形式进行注册。下面一起看下在SpringBoot上怎么实现Filter过滤器吧。

Filter过滤器具体实现类

@Component
public class AuthFilter implements Filter {
    public static final String X_CLACKS_OVERHEAD = "X-Clacks-Overhead";
    @Override
    public void doFilter(ServletRequest req, ServletResponse res,
                         FilterChain chain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) res;
        response.setHeader(X_CLACKS_OVERHEAD, "GNU Terry Pratchett");
        chain.doFilter(req, res);
    }
    @Override
    public void destroy() {}
    @Override
    public void init(FilterConfig arg0) throws ServletException {}
}

注册Filter过滤器

/**
 * 自定义配置项类，该类中和存入拦截器、过滤器等配置项信息
 * @author Administrator
 */
@Configuration
public class CustemConfigurerAdapter {
    @Bean
    public FilterRegistrationBean authFilterRegistrationBean() {
        FilterRegistrationBean registrationBean = new FilterRegistrationBean();
        registrationBean.setName("authFilter");
        AuthFilter authFilter = new AuthFilter();
        registrationBean.setFilter(authFilter);
        registrationBean.setOrder(1);
        List<String> urlList = new ArrayList<String>();
        urlList.add("/*");
        registrationBean.setUrlPatterns(urlList);
        return registrationBean;
    }
}

调试效果示意图