SpringBoot-攔截器配置

SpringBoot-攔截器配置

在我們的SSM項目中，可以在web.xml中配置攔截器，但是在SpringBoot中只能使用java類來配置，配置方法如下。

創建攔截器

1. 首先創建一個類如MyInterceptor
2. 實現HandlerInterceptor接口
3. 重寫其方法

package cn.ryafoo.core.interceptor;

import lombok.Builder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.lang.Nullable;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

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


/**
 * @author 張瑞豐
 * @description
 * @date 2019/11/19
 */
@Slf4j
public class MyInterepter implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        log.info("into my api");
        return  true;
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable ModelAndView modelAndView) throws Exception {
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable Exception ex) throws Exception {
    }
}

加載攔截器

1. 創建一個新類，如WebMvcConfig
2. 實現WebMvcConfigurer
3. 在其類上加入@Configuration注解
4. 重寫addInterceptors方法
5. 在方法內加入攔截規則，如registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**");

package cn.ryafoo.core.config;

import cn.ryafoo.core.interceptor.MyInterepter;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**
 * @author 張瑞豐
 * @description
 * @date 2019/11/19
 */
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new MyInterepter()).addPathPatterns("/**");
    }
}