SpringBoot（五）-- 整合Spring的攔截器

一、步驟

1.創建我們自己的攔截器類並實現 HandlerInterceptor 接口。 

2.創建一個Java類繼承WebMvcConfigurerAdapter，並重寫 addInterceptors 方法。

3.實例化我們自定義的攔截器，然后將對像手動添加到攔截器鏈中（在addInterceptors方法中添加）。

二、實例

1.創建自定義攔截器並實現HandlerInterceptor 接口

package com.xsjt.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

/**  
 * ClassName:XbqInterceptor 
 * 自定義攔截器
 * Date:     2017年11月6日 下午4:56:27
 * @author   Joe  
 * @version    
 * @since    JDK 1.8
 */
public class XbqInterceptor implements HandlerInterceptor{
    
    private static final Logger logger = LoggerFactory.getLogger(XbqInterceptor.class);

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        logger.info(this.getClass().getName() + "<---xbq--->preHandle");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        logger.info(this.getClass().getName() + "<---xbq--->postHandle");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        logger.info(this.getClass().getName() + "<---xbq--->afterCompletion");
    }
}

package com.xsjt.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

/**  
 * ClassName:XbqInterceptor 
 * 自定義攔截器
 * Date:     2017年11月6日 下午4:56:27
 * @author   Joe  
 * @version    
 * @since    JDK 1.8
 */
public class JoeInterceptor implements HandlerInterceptor{
    
    private static final Logger logger = LoggerFactory.getLogger(JoeInterceptor.class);

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        logger.info(this.getClass().getName() + "<---joe--->preHandle");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        logger.info(this.getClass().getName() + "<---joe--->postHandle");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        logger.info(this.getClass().getName() + "<---joe--->afterCompletion");
    }
}

2.創建一個Java類繼承WebMvcConfigurerAdapter，並重寫 addInterceptors 方法

3.實例化我們自定義的攔截器，然后將對像手動添加到攔截器鏈中（在addInterceptors方法中添加）

package com.xsjt.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import com.xsjt.interceptor.JoeInterceptor;
import com.xsjt.interceptor.XbqInterceptor;

/**  
 * ClassName:SpringInterceptorRegister 
 * Spring 攔截器 注冊器
 * Date:     2017年11月6日 下午4:58:32
 * @author   Joe  
 * @version    
 * @since    JDK 1.8
 */
@Configuration
public class SpringInterceptorRegister extends WebMvcConfigurerAdapter{

    /**
     * TODO 添加spring中的攔截器.  
     * @see org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter#addInterceptors(org.springframework.web.servlet.config.annotation.InterceptorRegistry)
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // 攔截所有路徑
        registry.addInterceptor(new XbqInterceptor()).addPathPatterns("/**");
        // 攔截/freemarker后路徑
        registry.addInterceptor(new JoeInterceptor()).addPathPatterns("/freemarker/**");
        super.addInterceptors(registry);
    }

    /**
     * TODO  注冊靜態文件的自定義映射路徑  
     * @see org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter#addResourceHandlers(org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry)
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/image/**").addResourceLocations("classpath:/image/");
        registry.addResourceHandler("/picture/**").addResourceLocations("file:D:/picture/");
        super.addResourceHandlers(registry);
    }
}

4.源碼下載

　　https://gitee.com/xbq168/spring-boot-learn