spring boot 中设置默认网页

ゝ一纸荒年。 2022-06-07 00:23 257阅读 0赞

废话不多说，直接上代码，相信都能看的懂  
一共两布，第一步，创建Interceptor拦截

package com.cy.example.config;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.web.servlet.HandlerInterceptor;
    import org.springframework.web.servlet.ModelAndView;
    
    public class LoginInterceptor implements HandlerInterceptor { 
    
        private Logger logger = LoggerFactory.getLogger(LoginInterceptor.class);
    
        public void postHandle(HttpServletRequest request,
                HttpServletResponse response, Object handler,
                ModelAndView modelAndView) throws Exception {
            // TODO Auto-generated method stub
    
        }
    
        public void afterCompletion(HttpServletRequest request,
                HttpServletResponse response, Object handler, Exception ex)
                throws Exception {
            // TODO Auto-generated method stub
    
        }
    
        public boolean preHandle(HttpServletRequest request,
                HttpServletResponse response, Object handler) throws Exception {
            // TODO Auto-generated method stub
            //获取session
            HttpSession session = request.getSession(true);
            logger.info("----进入登录拦截器--url："+request.getServletPath()+"-----");
            if(session.getAttribute(WebConfig.LOGIN_USER) == null){
                logger.info("------跳转到login页面-----");
                response.sendRedirect(request.getContextPath()+"/index");
                return false;
            }else{
                session.setAttribute(WebConfig.LOGIN_USER, session.getAttribute(WebConfig.LOGIN_USER));
                return true;
            }
        }
    
    }

第二步，注册创建的拦截器

package com.cy.example.config;
    
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
    import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
    import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
    
    @Configuration
    public class WebConfig extends WebMvcConfigurerAdapter { 
    
        public static String LOGIN_USER = "loginUser";
    
        public WebConfig() {
            super();
        }
        //因为新加了拦截器，这里需要重新设置资源地址
        @Override
        public void addResourceHandlers(ResourceHandlerRegistry registry) {
            registry.addResourceHandler("/static/**").addResourceLocations(
                    "classpath:/static/");
            registry.addResourceHandler("/templates/**").addResourceLocations(
                    "classpath:/templates/");
    
            super.addResourceHandlers(registry);
        }
    
        @Override
        public void configureDefaultServletHandling(
                DefaultServletHandlerConfigurer configurer) {
            configurer.enable();
        }
    
        @Override
        public void addInterceptors(InterceptorRegistry registry) {
            // 拦截规则：除了login，其他都拦截判断,excludePathPatterns是排除拦截的路径，一个是登录验证地址，一个是登录页
            registry.addInterceptor(new
    LoginInterceptor()).addPathPatterns("/**").excludePathPatterns("/index","/system/user/validate");
            super.addInterceptors(registry);
        }
    
    }