SpringBoot（五）-- 整合Spring的拦截器

一、步骤

1.创建我们自己的拦截器类并实现 HandlerInterceptor 接口。 

2.创建一个Java类继承WebMvcConfigurerAdapter，并重写 addInterceptors 方法。

3.实例化我们自定义的拦截器，然后将对像手动添加到拦截器链中（在addInterceptors方法中添加）。

二、实例

1.创建自定义拦截器并实现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 
 * 自定义拦截器
 * 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 
 * 自定义拦截器
 * 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.创建一个Java类继承WebMvcConfigurerAdapter，并重写 addInterceptors 方法

3.实例化我们自定义的拦截器，然后将对像手动添加到拦截器链中（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 拦截器 注册器
 * 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中的拦截器.  
     * @see org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter#addInterceptors(org.springframework.web.servlet.config.annotation.InterceptorRegistry)
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // 拦截所有路径
        registry.addInterceptor(new XbqInterceptor()).addPathPatterns("/**");
        // 拦截/freemarker后路径
        registry.addInterceptor(new JoeInterceptor()).addPathPatterns("/freemarker/**");
        super.addInterceptors(registry);
    }

    /**
     * TODO  注册静态文件的自定义映射路径  
     * @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.源码下载

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