SpringBoot 配置拦截器

SpringBoot 配置拦截器

用途：

• 日志记录
• 权限检查
• 性能监控

直接上代码：

MyInterceptor.java

package com.zhuantai.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

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

/**
 * @author ANTIA1
 * @date 2021/7/8 12:49
 */
public class MyInterceptor implements HandlerInterceptor {

    //该方法返回 false,请求将不再继续向下执行.
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("preHandle");
        return true;
    }

    //Controller 执行之后被调用
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("postHandle");
    }

    //preHandle方法返回true, afterCompletion才会执行，可以做一些清理工作
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("afterCompletion");
    }
}

WebMvcConfig.java

package com.zhuantai.interceptor;

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

/**
 * @author ANTIA1
 * @date 2021/7/8 12:54
 */
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new MyInterceptor())
                .addPathPatterns("/**")//拦截那些请求
                .excludePathPatterns("/hello");//排除哪些请求
    }
}

运行结果:

hello2 被成功拦截