springboot 拦截器配置

创建目录 interceptor——MyInterceptor.java文件，该文件实现 HandlerInterceptor 接口

MyInterceptor.java文件实现 HandlerInterceptor接口代码如下：

代码案例：（已验证cookie为案列）

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class MyInterceptor implements HandlerInterceptor {
    @Value("${token.name}")
    String tokenName;

    @Value("${token.value}")
    String tokenValue;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("拦截的请求"+request.getRequestURI());
        Cookie[] cookies = request.getCookies();
        for(int i = 0 , length = cookies.length ; i< length ; i++){
            if(cookies[i].getName().equals(tokenName) && cookies[i].getValue().equals(tokenValue)){
                return true;
            }
        }
        request.getRequestDispatcher("/nologin").forward(request,response);
        return false;
    }
}

创建目录 config —— MvcAppConfig.java文件 实现 WebMvcConfigurer接口

代码如下：

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import xyz.ark.backstage_09.interceptor.MyInterceptor;

import java.util.ArrayList;
import java.util.List;

@Configuration
public class MvcAppConfig  implements  WebMvcConfigurer{     //这里其实 也可以 去继承 extends  WebMvcConfigurerAdapter类 重写方法

    /**
     * 添加拦截器
     * @param registry
     */
    @Bean
    public MyInterceptor myInterceptor(){
        return new MyInterceptor();
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        List list = new ArrayList();
        list.add("/user/find");
        list.add("/index");

        //addInterceptor(添加自定义的拦截器)   addPathPatterns(要拦截的路径) excludePathPatterns(放心的路径)
        registry.addInterceptor(myInterceptor()).addPathPatterns(list); 
    }
}

搞定！！！