spring boot 2.x 攔截器

一、spring1.x配置方式

    在spring boot1.x中，使用攔截器，通常進行以下配置：

@Configuration
public class AppConfig extends WebMvcConfigurerAdapter {
	@Resource
	private FRInterceptor fRInterceptor;

	@Override
	public void addInterceptors(InterceptorRegistry registry) {
		//自定義攔截器，添加攔截路徑和排除攔截路徑 
		registry.addInterceptor(fRInterceptor).addPathPatterns("api/**").excludePathPatterns("api/login");
	}
}

    

    可是在spring boot2.x中，WebMvcConfigurerAdapter被deprecated，雖然繼承WebMvcConfigurerAdapter這個類雖然有此便利，但在Spring5.0裏面已經deprecated了。

    　官方文檔也說了，WebMvcConfigurer接口如今已經有了默認的空白方法，因此在Springboot2.0（Spring5.0）下更好的作法仍是implements WebMvcConfigurer。

二、spring2.x配置方式

2.1攔截器統一管理

import javax.annotation.Resource;

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

import com.spring.pro.interceptor.FileUploadInterceptor;

/**
 * @ClassName: WebConfig
 * @Description:
 * @author weiyb
 * @date 2018年5月7日 上午11:30:58
 */
@Configuration
public class WebConfig implements WebMvcConfigurer {
	@Resource
	private FileUploadInterceptor fileUploadInterceptor;

	@Override
	public void addInterceptors(InterceptorRegistry registry) {
		// 自定義攔截器，添加攔截路徑和排除攔截路徑
		registry.addInterceptor(fileUploadInterceptor).addPathPatterns("/**");
	}
}

2.2自定義攔截器

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

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

/**
 * 文件上傳攔截器
 * @ClassName: FileUploadInterceptor
 * @Description:
 * @author weiyb
 * @date 2018年5月7日 上午11:51:53
 */
@Component
public class FileUploadInterceptor implements HandlerInterceptor {
	/*
	 * 視圖渲染以後的操做
	 */
	@Override
	public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)
			throws Exception {

	}

	/*
	 * 處理請求完成後視圖渲染以前的處理操做
	 */
	@Override
	public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
			throws Exception {

	}

	/*
	 * 進入controller層以前攔截請求
	 */
	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object obj) throws Exception {
		System.out.println("getContextPath:" + request.getContextPath());
		System.out.println("getServletPath:" + request.getServletPath());
		System.out.println("getRequestURI:" + request.getRequestURI());
		System.out.println("getRequestURL:" + request.getRequestURL());
		System.out.println("getRealPath:" + request.getSession().getServletContext().getRealPath("image"));
		return true;
	}

}