SpringBoot的URL拦截器

1、数据验证拦截器类

package com.yt.interceptor;

import lombok.extern.log4j.Log4j2;
import org.springframework.http.MediaType;
import org.springframework.lang.Nullable;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 拦截器数据验证
 * @author tyg
 * @date   2020年8月5日下午3:46:09
 */
@Log4j2
@Component
public class AuthHandlerInterceptor extends HandlerInterceptorAdapter {

	private long startTime = 0;

	/**
	 * 请求处理前调用
	 */
	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
		startTime = System.currentTimeMillis();
		return super.preHandle(request, response, handler);
	}

	/**
	 * 请求处理完后渲染视图前调用
	 */
	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable ModelAndView modelAndView) throws Exception {
		log.info("\n======请求地址：{}，耗时：{}ms", request.getServletPath(), System.currentTimeMillis() - startTime);
		super.postHandle(request, response, handler, modelAndView);
	}

	/**
	 * 渲染视图后调用
	 */
	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
		super.afterCompletion(request, response, handler, ex);
	}

	/**
	 * 响应未授权信息
	 * @param response 响应
	 * @return void
	 * @author tyg
	 * @date   2018年12月7日下午2:01:59
	 */
	private void writeUnAuth(HttpServletResponse response) {
		Result<?> result = ResultUtil.unAuth();
		response.setContentType(MediaType.APPLICATION_JSON_VALUE);
		response.setCharacterEncoding(WechatConstant.UTF8);
		response.setStatus(HttpServletResponse.SC_OK);
		try {
			response.getWriter().print(JSONObject.toJSONString(result));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}

2、将数据验证拦截器类加入到拦截器中

package com.yt.interceptor;

import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import javax.annotation.Resource;

/**
 * 加入URL拦截
 * @author tyg
 * @date 2020-12-31 14:59
 */
@Configuration
public class InterceptorConfig extends WebMvcConfigurationSupport {

    @Resource
    private AuthHandlerInterceptor globalInterceptor;

    /**
     * 加入权限拦截
     * @param registry 帮助配置映射的拦截器列表
     * @author tyg
     * @date 2020-12-31 14:59
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(globalInterceptor).addPathPatterns("/**");
        super.addInterceptors(registry);
    }

    /**
     * 设置默认数据
     */
    @Override
    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
        // 默认返回格式 JSON
        configurer.defaultContentType(MediaType.APPLICATION_JSON);
    }
}

3、第2步中，会存在一个问题，如果设置了返回时间格式为如下，是不会生效的，还是会返回时间戳，如果要返回格式化了的时间，那么就要将第2步进行替换，具体原因就与加载机制有关了。

spring.jackson.date-format: yyyy-MM-dd HH:mm:ss

替换为：

package com.yt.interceptor;

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

import javax.annotation.Resource;

/**
 * 加入URL拦截
 * @author tyg
 * @date 2020-12-31 14:59
 */
@Configuration
public class InterceptorConfig implements WebMvcConfigurer {

    @Resource
    private AuthHandlerInterceptor globalInterceptor;

    /**
     * 加入权限拦截
     * @param registry 帮助配置映射的拦截器列表
     * @author tyg
     * @date 2020-12-31 14:59
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(globalInterceptor).addPathPatterns("/**");
    }
}

本文地址：https://blog.csdn.net/qq_26365837/article/details/112022854