spring boot 添加拦截器

来源：互联网发布：ubuntu 如何编辑文件编辑：程序博客网时间：2024/05/17 01:09

构建一个spring boot项目。

添加拦截器需要添加一个configuration

@Configuration@ComponentScan(basePackageClasses = Application.class, useDefaultFilters = true)public class ServletContextConfig extends WebMvcConfigurationSupport {

为了方便扫描位置，我们可以写一个接口或者入口类Application放置于最外一层的包内，这样就会扫描该类以及子包的类。

1 resources配置

在没有配置这个类的时候，我们可以在application.ym中修改静态文件位置和匹配方式：

#指定环境配置文件spring:  profiles:    active: dev  # 修改默认静态路径，默认为/**，当配置hello.config.ServletContextConfig后此处配置失效  mvc:    static-path-pattern: /static/**

但当我们继承了WebMvcConfigurationSupport 并配置扫描后，上述resources的配置失效，还原默认配置。那么我们需要在这个类中再次指定静态资源位置：

@Override    public void addResourceHandlers(ResourceHandlerRegistry registry) {        registry.addResourceHandler("/").addResourceLocations("/**");        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");    }

这样访问classpath下的static包下的静态资源的url匹配为/static/xxx.js。默认匹配static下的静态文件url为/xxx.js，虽然清洁，但我感觉idea不会识别这种路径，还是改成完整的路径比较好。

2.Interceptor配置

配置登录拦截或者别的。需要创建一个拦截器类来继承HandlerInterceptorAdapter,然后只需要覆盖你想要拦截的位置就可以了。比如，我只是拦截访问方法之前：

package hello.interceptor;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/** * Created by miaorf on 2016/8/3. */public class LoginInterceptor extends HandlerInterceptorAdapter {    private Logger logger = LoggerFactory.getLogger(LoginInterceptor.class);    @Override    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {        String authorization = request.getHeader("Authorization");        logger.info("The authorization is: {}",authorization);        return super.preHandle(request, response, handler);    }}

写好interceptor之后需要在开始创建的ServletContextConfig中添加这个拦截器：

@Override    public void addInterceptors(InterceptorRegistry registry) {        registry.addInterceptor(new LoginInterceptor())                .addPathPatterns("/**")                .excludePathPatterns(FAVICON_URL)        ;    }

完整的ServletContextConfig为：

/* * The MIT License (MIT) * * Copyright (c) 2014-2016 abel533@gmail.com * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */package hello.config;import hello.Application;import hello.interceptor.LoginInterceptor;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;import org.springframework.web.servlet.config.annotation.InterceptorRegistry;import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;/** * */@Configuration@ComponentScan(basePackageClasses = Application.class, useDefaultFilters = true)public class ServletContextConfig extends WebMvcConfigurationSupport {    static final private String FAVICON_URL = "/favicon.ico";    static final private String PROPERTY_APP_ENV = "application.environment";    static final private String PROPERTY_DEFAULT_ENV = "dev";    /**     * 发现如果继承了WebMvcConfigurationSupport，则在yml中配置的相关内容会失效。     * @param registry     */    @Override    public void addResourceHandlers(ResourceHandlerRegistry registry) {        registry.addResourceHandler("/").addResourceLocations("/**");        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");    }    /**     * 配置servlet处理     */    @Override    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {        configurer.enable();    }    @Override    public void addInterceptors(InterceptorRegistry registry) {        registry.addInterceptor(new LoginInterceptor())                .addPathPatterns("/**")                .excludePathPatterns(FAVICON_URL)        ;    }}

View Code

3.AOP拦截方法

相关测试代码http://www.cnblogs.com/woshimrf/p/5677337.html

本demo源码：

https://github.com/chenxing12/spring-boot-demo

0 0