拦截器与过滤器的实现代码

1.新建一个interceptor包

LoginInterceptor.java

import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        if (request.getSession().getAttribute("uid") == null) {
            response.sendRedirect("/web/login.html");
            return false;
        }
        return true;
    }
}

2.新建一个配置包config

LoginInterceptorConfigurer.java

import com.cy.store.interceptor.LoginInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.ArrayList;
import java.util.List;


@Configuration
public class LoginInterceptorConfigurer implements WebMvcConfigurer {
    
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // 创建拦截器对象
        HandlerInterceptor interceptor = new LoginInterceptor();

        // 白名单
        List patterns = new ArrayList<>();
        patterns.add("/bootstrap3
@WebFilter(filterName = "loginCheckFilter",urlPatterns = "
    public boolean check(String[] urls,String requestURI){
        for (String url : urls) {
            boolean match = PATH_MATCHER.match(url, requestURI);
            if(match){
                return true;
            }
        }
        return false;
    }
}