springBoot项目配置拦截器

青旅半醒 2023-09-30 23:09 16阅读 0赞

## springBoot项目如何配置拦截器 ##

1.首先需要需要创建一个springBoot项目，然后在目录下创建一个config目录。

2.创建拦截器类

/**
     * 拦截器
     * @author xiyunhai
     * @date 2023/04/12 18:12
     **/
    public class MyInterceptor implements HandlerInterceptor {
        
    
        /**
         * 访问控制器方法前执行
         */
        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        
    //        System.out.println("拦截器拦截成功");
            response.setHeader("Access-Control-Allow-Origin", "*");
            response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, PUT, HEAD");
            response.setHeader("Access-Control-Allow-Headers", "Content-Type, Token, adminID");
            response.setHeader("Access-Control-Max-Age", "3600");
    
            return HandlerInterceptor.super.preHandle(request, response, handler);
        }
    
        @Override
        public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        
            HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
        }
    
        @Override
        public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        
            HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
        }
    }

创建配置拦截器类

import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
    /**
     * 配置拦截器
     * @author songx
     * @date 2023/04/12 18:18
     **/
    @Configuration
    public class WebConfig implements WebMvcConfigurer {
        
        /**
         * 添加Web项目的拦截器
         */
        @Override
        public void addInterceptors(InterceptorRegistry registry) {
        
    
            // 对所有访问路径，都通过MyInterceptor类型的拦截器进行拦截
    //        addPathPatterns(/**):这个是所有的请求会被拦截
            //排除的路径：静态资源路径。防止被JdkApiInterceptor拦截
    //        excludePathPatterns():就是要放行哪些路径
            registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**")
                    .excludePathPatterns("/openAi","/login", "/index.html", "/user/login", "/css/**", "/images/**", "/js/**", "/fonts/**");
        }
    }

然后我们启动springBoot项目，当我们在进行访问后端接口时，前置拦截器就会进行拦截。