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SpringCloud使用HandlerInterceptor拦截器

作者:互联网

一、编写自定义拦截器SignAutheInterceptor.class

preHandle:在业务处理器处理请求之前被调用。预处理,可以进行编码、安全控制、权限校验等处理;
postHandle:在业务处理器处理请求执行完成后,生成视图之前执行。后处理(调用了Service并返回ModelAndView,但未进行页面渲染),有机会修改ModelAndView (这个博主就基本不怎么用了);
afterCompletion:在DispatcherServlet完全处理完请求后被调用,可用于清理资源等。返回处理(已经渲染了页面);

package com.xiaohang.socialcard.pre.intercepter;

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

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

/**
 * 自定义拦截器
 */
public class SignAutheInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        /**
         * 通过HttpServletRequest和HttpServletResponse做相应数据处理
         */
        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 {

    }
}

二、配置拦截器InterceptorConfig.class

通过addPathPatterns属性可配置需要进行拦截的请求路径
通过excludePathPatterns属性可配置不进行拦截的请求路径

package com.xiaohang.socialcard.pre.intercepter;

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

/**
 * 配置拦截器
 */
@Configuration
public class InterceptorConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new SignAutheInterceptor()).addPathPatterns("/api/v1/get/getToken");
        super.addInterceptors(registry);
    }
}

标签:拦截器,SpringCloud,springframework,org,import,servlet,public,HandlerInterceptor
来源: https://blog.51cto.com/12012821/2418335