spring boot拦截器配置

时间：2022-02-01 12:39:54

1.在spring boot配置文件application.properties中添加要拦截的链接

com.url.interceptor=/user/test

2.编写拦截器代码 ，创建UrlInterceptorUtil 类

 import org.springframework.core.io.ClassPathResource;

 import org.springframework.core.io.Resource;

 import org.springframework.core.io.support.PropertiesLoaderUtils;

 import org.springframework.stereotype.Component;

 import org.springframework.web.servlet.ModelAndView;

 import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import javax.servlet.http.HttpSession;

 import java.util.Properties;

 @Component

 public class UrlInterceptorUtil extends HandlerInterceptorAdapter {

     private String noCheckUrls;

     private static Properties props ;

     @Override

     public boolean preHandle(HttpServletRequest request,

                              HttpServletResponse response, Object handler) throws Exception {

         String url=request.getRequestURI();

         Resource resource = new ClassPathResource("/application.properties");//

         props = PropertiesLoaderUtils.loadProperties(resource);

         noCheckUrls=props.getProperty("com.url.interceptor","");

         if(!noCheckUrls.contains(url)){

                 return true;

         }

         HttpSession session=request.getSession();

 　　　　　//业务逻辑处理

         if (session.getAttribute("User")==null){

             response.sendRedirect("/index");

             return false;

         }

         return true;

     }

         @Override

         public void postHandle(HttpServletRequest request,

                                HttpServletResponse response, Object o, ModelAndView mav)

             throws Exception {

 //        System.out.println("postHandle");

     }

     @Override

     public void afterCompletion(HttpServletRequest request,

                                 HttpServletResponse response, Object o, Exception excptn)

             throws Exception {

 //        System.out.println("afterCompletion");

     }

 }

3.配置spring boot拦截

import org.springframework.context.annotation.Configuration;

import org.springframework.web.servlet.config.annotation.InterceptorRegistry;

import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

//标注此文件为一个配置项，spring boot才会扫描到该配置。该注解类似于之前使用xml进行配置

@Configuration

public class CustomWebMvcConfigurerAdapter extends WebMvcConfigurerAdapter {

    @Override

    public void addInterceptors(InterceptorRegistry registry) {

        //对所有的请求进行拦截

        registry.addInterceptor(new UrlInterceptorUtil()).addPathPatterns("/**");

    }

}


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