springboot添加拦截器

1.依赖包引入见前面文章
2.定义一个类实现HandlerInterceptor接口，复写preHadler等实现

package com.zqw.springboot.learn.boot.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 MyInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println(handler);
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}

3.注册拦截器，在主类，或自定义一个类 在@Configuration注解的类内实现WebMvcConfigurationAdaptor类，将前面的拦截器添加进去

package com.zqw.springboot.learn.boot;

import com.zqw.springboot.learn.boot.interceptor.MyInterceptor;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import java.util.Random;

@SpringBootApplication
public class BootApplication extends WebMvcConfigurerAdapter {

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

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(myInterceptor());
    }

    @Bean
    public MyInterceptor myInterceptor(){
        return new MyInterceptor();
    }
}

github地址

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