spring boot拦截器配置

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

com.url.interceptor=/user/test

2.编写拦截器代码 ，建立UrlInterceptorUtil 类

 1 import org.springframework.core.io.ClassPathResource;
 2 import org.springframework.core.io.Resource;
 3 import org.springframework.core.io.support.PropertiesLoaderUtils;
 4 import org.springframework.stereotype.Component;
 5 import org.springframework.web.servlet.ModelAndView;
 6 import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
 7 
 8 
 9 import javax.servlet.http.HttpServletRequest;
10 import javax.servlet.http.HttpServletResponse;
11 import javax.servlet.http.HttpSession;
12 import java.util.Properties;
13 
14 @Component
15 public class UrlInterceptorUtil extends HandlerInterceptorAdapter {
16 
17     private String noCheckUrls;
18     private static Properties props ;
19 
20     @Override
21     public boolean preHandle(HttpServletRequest request,
22                              HttpServletResponse response, Object handler) throws Exception {
23         String url=request.getRequestURI();
24         Resource resource = new ClassPathResource("/application.properties");//
25         props = PropertiesLoaderUtils.loadProperties(resource);
26         noCheckUrls=props.getProperty("com.url.interceptor","");
27         if(!noCheckUrls.contains(url)){
28                 return true;
29         }
30         HttpSession session=request.getSession();
31 　　　　　//业务逻辑处理
32         if (session.getAttribute("User")==null){
33             
34             response.sendRedirect("/index");
35             return false;
36         }
37         return true;
38     }
39 
40         @Override
41         public void postHandle(HttpServletRequest request,
42                                HttpServletResponse response, Object o, ModelAndView mav)
43             throws Exception {
44 //        System.out.println("postHandle");
45     }
46 
47     @Override
48     public void afterCompletion(HttpServletRequest request,
49                                 HttpServletResponse response, Object o, Exception excptn)
50             throws Exception {
51 //        System.out.println("afterCompletion");
52     }
53 }

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。该注解相似于以前使用xml进行配置
@Configuration
public class CustomWebMvcConfigurerAdapter extends WebMvcConfigurerAdapter {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //对全部的请求进行拦截
        registry.addInterceptor(new UrlInterceptorUtil()).addPathPatterns("/**");
    }
}