springboot中使用filter用配置类方式

在03-springboot-web的Filter包下，创建HeFilter类

代码示例：

package com.bjpowernode.springboot.filter;  import javax.servlet.*; import java.io.IOException;  public class HeFilter implements Filter {     @Override     public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {         System.out.println("您已经进入HeFilter过滤器……");         filterChain.doFilter(servletRequest,servletResponse);     } }

在配置包config下的servlet配置类中添加对filter的配置

在03-springboot-web的config包的ServletConfig配置类中添加如下代码

代码如下：

package com.bjpowernode.springboot.config;  import com.bjpowernode.springboot.filter.HeFilter; import com.bjpowernode.springboot.servlet.HeServlet; import org.springframework.boot.web.servlet.FilterRegistrationBean; import org.springframework.boot.web.servlet.ServletRegistrationBean; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration;  import javax.servlet.ServletRegistration;  @Configuration public class ServletConfig {      @Bean     public ServletRegistrationBean heServletRegisterBen() {         ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(                 new HeServlet(), "/servlet/heservlet"         );         return servletRegistrationBean;     }      @Bean     public FilterRegistrationBean heFilterRegisterBen(){         FilterRegistrationBean filterRegistrationBean=new FilterRegistrationBean();         filterRegistrationBean.setFilter(new HeFilter());         filterRegistrationBean.addUrlPatterns("/*");         return filterRegistrationBean;     }  }

启动springboot项目使用postman访问：http://localhost:8080/servlet/heservlet

在控制台上会看到过滤器里面的输出文字。