springboot配置登录拦截器

1.拦截器代码

package com.jf3q.education.Interceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
public class LoginInterceptor implements HandlerInterceptor {
    // 执行Handler方法之前执行
    // 用于身份认证、身份授权
    // 比如身份认证，如果认证通过表示当前用户没有登陆，需要此方法拦截不再向下执行
   //验证用户权限
    @Override
    public boolean preHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession();
        if(session.getAttribute("loginAdmin")!=null){
            return true;
        }else{
            request.getRequestDispatcher("/WEB-INF/jsp/admin/login.jsp").forward(request, response);
            return false;
        }
    }
    // 进入Handler方法之后，返回modelAndView之前执行
    // 应用场景从modelAndView出发：将公用的模型数据(比如菜单导航)在这里
    // 传到视图，也可以在这里统一指定视图
    @Override
    public void postHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler,
            ModelAndView modelAndView) throws Exception {
    }
    // 执行Handler完成执行此方法
    // 应用场景：统一异常处理，统一日志处理
    @Override
    public void afterCompletion(HttpServletRequest request,
            HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
    }
}

2.注册进系统并设置放行拦截的路径

package com.jf3q.education;
import java.util.List;
import org.springframework.context.annotation.Configuration;
import org.springframework.format.FormatterRegistry;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.validation.MessageCodesResolver;
import org.springframework.validation.Validator;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.HandlerMethodReturnValueHandler;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.config.annotation.AsyncSupportConfigurer;
import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.PathMatchConfigurer;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.ViewResolverRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import com.jf3q.education.Interceptor.LoginInterceptor;
@Configuration
public class WebappAdapter implements WebMvcConfigurer{
    /**
     * 注册拦截器
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LoginInterceptor())
                .addPathPatterns("/**") //所有请求都被拦截，包括静态资源
                .excludePathPatterns("/","/index","/login","/static/**","/favicon.ico");//设置不拦截的路径;
    }
    @Override
    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void addCorsMappings(CorsRegistry arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void addFormatters(FormatterRegistry arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void addReturnValueHandlers(
            List<HandlerMethodReturnValueHandler> arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void addViewControllers(ViewControllerRegistry arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void configureAsyncSupport(AsyncSupportConfigurer arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void configureContentNegotiation(ContentNegotiationConfigurer arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void configureDefaultServletHandling(
            DefaultServletHandlerConfigurer arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void configureHandlerExceptionResolvers(
            List<HandlerExceptionResolver> arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void configurePathMatch(PathMatchConfigurer arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void configureViewResolvers(ViewResolverRegistry arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void extendHandlerExceptionResolvers(
            List<HandlerExceptionResolver> arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> arg0) {
        // TODO Auto-generated method stub
    }
    @Override
    public MessageCodesResolver getMessageCodesResolver() {
        // TODO Auto-generated method stub
        return null;
    }
    @Override
    public Validator getValidator() {
        // TODO Auto-generated method stub
        return null;
    }
}