springboot自學之路-18（springboot註冊攔截器）

一、定義攔截器 MyIntercepter
 

package com.example._09intercepter;

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

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

/**
 * @Package: com.example._09intercepter
 * @ClassName: MyIntercepter
 * @Description: <p>Description: </p>
 * @author: zq
 * @since: 2020/5/5 19:27
 * @version: 1.0
 * @Copyright: 2020 zq. All rights reserved.
 */
public class MyIntercepter extends HandlerInterceptorAdapter {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("MyIntercepter 攔截器");
        return true;
    }

}

二、定義測試controller

package com.example._09intercepter;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * @Package: com.example._09intercepter
 * @ClassName: IntercepterController
 * @Description: <p>Description: </p>
 * @author: zq
 * @since: 2020/5/5 19:31
 * @version: 1.0
 * @Copyright: 2020 zq. All rights reserved.
 */
@Controller
public class IntercepterController {

    @RequestMapping("/helloIntercepter")
    @ResponseBody
    public String helloIntercepter() {

        return "helloIntercepter";

    }

}

三、定義啓動類，繼承 WebMvcConfigurerAdapter，註冊攔截器

package com.example._09intercepter;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**
 * @Package: com.example._09intercepter
 * @ClassName: AppConfig
 * @Description: <p>Description: </p>
 * @author: zq
 * @since: 2020/5/5 19:28
 * @version: 1.0
 * @Copyright: 2020 zq. All rights reserved.
 */
@SpringBootApplication
public class AppConfig extends WebMvcConfigurerAdapter {

    //註冊攔截器
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(myIntercepter()).addPathPatterns("/*");
    }

    @Bean
    public MyIntercepter myIntercepter() {

        return new MyIntercepter();

    }

    public static void main(String[] args) {
        SpringApplication.run(AppConfig.class, args);
    }

}

四、測試驗證;http://localhost:8084/citic/helloIntercepter