构建一个spring boot项目。
添加拦截器需要添加一个configuration
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@Configuration
@ComponentScan (basePackageClasses = Application. class , useDefaultFilters = true )
public class ServletContextConfig extends WebMvcConfigurationSupport {
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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:
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#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/**
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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:
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@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler( "/" ).addResourceLocations( "/**" );
registry.addResourceHandler( "/static/**" ).addResourceLocations( "classpath:/static/" );
}
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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:
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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);
}
}
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写好interceptor之后需要在开始创建的ServletContextConfig中添加这个拦截器:
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@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor( new LoginInterceptor())
.addPathPatterns( "/**" )
.excludePathPatterns(FAVICON_URL)
;
}
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完整的ServletContextConfig为:
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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)
;
}
}
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github地址:https://github.com/chenxing12/spring-boot-demo
本demo源码:spring-boot-demo.rar
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://www.cnblogs.com/woshimrf/p/5734956.html