SpringMVC訪問靜態資源

SpringMVC訪問靜態資源

 

在SpringMVC中經常使用的就是Controller與View。可是咱們經常會須要訪問靜態資源,如html,js,css,image等。css

默認的訪問的URL都會被DispatcherServlet所攔截,可是咱們但願靜態資源能夠直接訪問。該腫麼辦呢?html

在配置文件:web.xml能夠看到: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>

 

靜態資源訪問,其實方法有多種,如:經過開放tomcat的defaultServlet,修改默認的url-parttern。web

 

可是SpringMVC提供了更爲便捷的方式處理靜態資源。spring

解決方案:spring-mvc

直接在servlet-context.xml中添加資源映射。tomcat

 

個人開發環境: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的路徑以下:

配置文件內容:

<?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>

 

資源映射

<!-- 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:本地資源路徑,注意必須是webapp根目錄下的路徑。

兩個*,它表示映射resources/下全部的URL,包括子路徑(即接多個/)

 

這樣咱們就能夠直接訪問該文件夾下的靜態內容了。

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根目錄下才行,若是你將資源目錄,放置到webapp/WEB-INF下面的話,則就會訪問失敗。這個問題經常會犯。

錯誤方式:

WEB-INF目錄做用

WEB-INF是Java的WEB應用的安全目錄。所謂安全就是客戶端沒法訪問,只有服務端能夠訪問的目錄。
若是想在頁面中直接訪問其中的文件,必須經過web.xml文件對要訪問的文件進行相應映射才能訪問。
 
固然,你非要放在WEB-INF中,則必須修改resources映射,如:
<resources mapping="/js/**" location="/WEB-INF/js/" />

 

推薦方式:本文的目錄結構爲以下圖所示。

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