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。