springboot添加过滤器

 

1、

package com.gooney.filter;


import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebFilter(urlPatterns = "/api/*",filterName = "loginFilter")
public class LoginFileter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.println("doFilter");
        String name=servletRequest.getParameter("name");
        System.out.println(name);
        if(name.equals("wjl")){
            filterChain.doFilter(servletRequest,servletResponse);
        }else {
            HttpServletResponse response=(HttpServletResponse)servletResponse;
            response.sendRedirect("/upload.html");
            return;
        }
    }

    @Override
    public void destroy() {

    }
}

2、添加@ServletComponentScan注解，否则不起作用

package com.gooney;

        
        import com.gooney.config.InterceptorConfig;
        import org.springframework.boot.SpringApplication;
        import org.springframework.boot.autoconfigure.SpringBootApplication;
        import org.springframework.boot.web.servlet.ServletComponentScan;
        import org.springframework.context.annotation.Import;

@SpringBootApplication
@Import(InterceptorConfig.class)
@ServletComponentScan//
public class SpringbootStartApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringbootStartApplication.class, args);
    }

}