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Spring Boot拦截器的使用

使用注解@Configuration

继承WebMvcConfigurerAdapter

重写addInterceptors添加需要拦截器地址：

运行截图如下：

后端拦截如下：

这里主要是依靠注册拦截器实现的

这里一个拦截器可以进行多个链接过滤，只需在后面加入addPathPatterns即可

程序结构如下：

WebMvcConfig.java

package com.example.demo.config;import com.example.demo.interceptor.OneInterceptor;import com.example.demo.interceptor.TwoInterceptor;import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.config.annotation.InterceptorRegistry;import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;@Configurationpublic class WebMvcConfig extends WebMvcConfigurerAdapter {    @Override    public void addInterceptors(InterceptorRegistry registry) {        registry.addInterceptor(new OneInterceptor()).addPathPatterns("/one/**");        registry.addInterceptor(new TwoInterceptor()).addPathPatterns("/two/**");        registry.addInterceptor(new OneInterceptor()).addPathPatterns("/three/**");        registry.addInterceptor(new TwoInterceptor()).addPathPatterns("/three/**");        super.addInterceptors(registry);    }}

OneController.java

package com.example.demo.interceptor;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;@Controller@RequestMapping("one")public class OneController {    @RequestMapping("/index")    public String index(){        return "index";    }    @RequestMapping("/index2")    public String index2(){        return "index2";    }    @RequestMapping("/index3")    public String index3(){        return "index3";    }}

OneInterceptor.java

package com.example.demo.interceptor;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class OneInterceptor implements HandlerInterceptor {    /**     * 在请求处理之前进行调用（Controller方法调用之前）     */    @Override    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,                             Object object) throws Exception {        System.out.println("OneInterceptor preHandle");        return true;    }    @Override    public void postHandle(HttpServletRequest request, HttpServletResponse response,                           Object object, ModelAndView mv)            throws Exception {        System.out.println("OneInterceptor postHandle");    }    /**     * 在整个请求结束之后被调用，也就是在DispatcherServlet 渲染了对应的视图之后执行     * （主要是用于进行资源清理工作）     */    @Override    public void afterCompletion(HttpServletRequest request, HttpServletResponse response,                                Object object, Exception ex)            throws Exception {        System.out.println("OneInterceptor afterCompletion");    }}

ThreeController.java

package com.example.demo.interceptor;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;@Controller@RequestMapping("three")public class ThreeController {    @RequestMapping("/index")    public String index(){        return "index";    }    @RequestMapping("/index2")    public String index2(){        return "index2";    }    @RequestMapping("/index3")    public String index3(){        return "index3";    }}

TwoController.java

package com.example.demo.interceptor;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;@Controller@RequestMapping("two")public class TwoController{    @RequestMapping("/index")    public String index(){        return "index";    }    @RequestMapping("/index2")    public String index2(){        return "index2";    }    @RequestMapping("/index3")    public String index3(){        return "index3";    }}

TwoInterceptor.java

package com.example.demo.interceptor;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class TwoInterceptor implements HandlerInterceptor {    /**     * 在请求处理之前进行调用（Controller方法调用之前）     */    @Override    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,                             Object object) throws Exception {        System.out.println("TwoController preHandle");        return false;    }    @Override    public void postHandle(HttpServletRequest request, HttpServletResponse response,                           Object object, ModelAndView mv)            throws Exception {        System.out.println("TwoController postHandle");    }    /**     * 在整个请求结束之后被调用，也就是在DispatcherServlet 渲染了对应的视图之后执行     * （主要是用于进行资源清理工作）     */    @Override    public void afterCompletion(HttpServletRequest request, HttpServletResponse response,                                Object object, Exception ex)            throws Exception {        System.out.println("TwoController afterCompletion");    }}

index相关.html

    
       
INDEX PAGE

porn.xml

   
       
    
     4.0.0
        
            
     
      org.springframework.boot
             
     
      spring-boot-starter-parent
             
     
      2.1.12.RELEASE
             
      
         
        
    
     com.example
        
    
     demo
        
    
     0.0.1-SNAPSHOT
        
    
     demo
        
    
     Demo project for Spring Boot
        
            
     
      1.8
         
        
            
                 
      
       org.springframework.boot
                  
      
       spring-boot-starter-web
              
             
                 
      
       org.projectlombok
                  
      
       lombok
                  
      
       true
              
             
                 
      
       org.springframework.boot
                  
      
       spring-boot-starter-test
                  
      
       test
              
             
                 
      
       org.springframework.boot
                  
      
       spring-boot-starter-thymeleaf
              
         
        
            
                 
                      
       
        org.springframework.boot
                       
       
        spring-boot-maven-plugin
                   
              
         
    
   

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