SpringMVC访问静态资源

SpringMVC访问静态资源

 

在SpringMVC中经常使用的就是Controller与View。可是咱们经常会须要访问静态资源,如html,js,css,image等。css

默认的访问的URL都会被DispatcherServlet所拦截,可是咱们但愿静态资源能够直接访问。该肿么办呢?html

在配置文件:web.xml能够看到:jquery

    <!-- Processes application requests -->
    <servlet>
        <servlet-name>appServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
        
    <servlet-mapping>
        <servlet-name>appServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

 

静态资源访问,其实方法有多种,如:经过开放tomcat的defaultServlet,修改默认的url-parttern。web

 

可是SpringMVC提供了更为便捷的方式处理静态资源。spring

解决方案:spring-mvc

直接在servlet-context.xml中添加资源映射。tomcat

 

个人开发环境:安全

一、Eclipse Luna SP1cookie

二、Springsource-tool-suite 3.6.4 mvc

 

修改servlet-context.xml,添加resource映射便可。

servlet-context.xml的路径以下:

配置文件内容:

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:beans="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
    
    <!-- Enables the Spring MVC @Controller programming model -->
    <annotation-driven />

    <!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
    <resources mapping="/resources/**" location="/resources/" />
    <resources mapping="/images/**" location="/images/" />
    <resources mapping="/js/**" location="/js/" />

    <!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
    <beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <beans:property name="prefix" value="/WEB-INF/views/" />
        <beans:property name="suffix" value=".jsp" />
    </beans:bean>
    
    <context:component-scan base-package="com.yank.firstapp" />        
    
</beans:beans>

 

资源映射

    <!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
    <resources mapping="/resources/**" location="/resources/" />
    <resources mapping="/images/**" location="/images/" />
    <resources mapping="/js/**" location="/js/" />

mapping:映射

location:本地资源路径,注意必须是webapp根目录下的路径。

两个*,它表示映射resources/下全部的URL,包括子路径(即接多个/)

 

这样咱们就能够直接访问该文件夹下的静态内容了。

如:

http://localhost:8090/firstapp/images/cookie.png

http://localhost:8090/firstapp/js/jquery-1.11.2.js

效果:

陷阱:

配置的location必定要是webapp根目录下才行,若是你将资源目录,放置到webapp/WEB-INF下面的话,则就会访问失败。这个问题经常会犯。

错误方式:

WEB-INF目录做用

WEB-INF是Java的WEB应用的安全目录。所谓安全就是客户端没法访问,只有服务端能够访问的目录。
若是想在页面中直接访问其中的文件,必须经过web.xml文件对要访问的文件进行相应映射才能访问。
 
固然,你非要放在WEB-INF中,则必须修改resources映射,如:
<resources mapping="/js/**" location="/WEB-INF/js/" />

 

推荐方式:本文的目录结构为以下图所示。

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