spring - 如何使用类路径位置

Question

为了解决这个问题，我到处搜索，但找不到解决方案。问题如下：我在 Tomcat 7 服务器上构建了一个 Spring-mvc webapp - 准确地说是 7.0.12 - 我无法让<mvc:resources>标签正常工作。正如您将在下面看到<mvc:resources>旧资源文件夹的作品，但我更喜欢将资源文件夹放在/WEB-INF/web/目录中。

MediorkoorVOICES-Web-servlet.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:context="http://www.springframework.org/schema/context"
   xmlns:mvc="http://www.springframework.org/schema/mvc"
   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
      http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">        

    <context:component-scan base-package="com.oudejans.mediorkoorvoices.web" /> 

    <mvc:resources mapping="/resources/**" location="/WEB-INF/web/resources/"  />  
    <mvc:annotation-driven />

    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/web/jsp/" />
        <property name="suffix" value=".jsp" />
        <property name="order" value="1" />
    </bean>

    <bean id="handlerMapping" class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" /> 

    <import resource="web/tiles/web-tiles.xml" />
</beans>

文件夹结构：

META-INF
resources (Old resources folder)
    - web
        - images
        - css
            - main.css      
WEB-INF
    - classes
    - lib
    - admin
    - shared
    - web
        - jsp
        - tiles
        - resources (New resources folder i want to access)
            - images
                - banner.png
            - js
            - etc.

现在，如果我想访问旧的资源文件夹，下面的代码就可以了。

<mvc:resources mapping="/resources/**" location="/resources/" />
&
<img src="${pageContext.request.contextPath}/resources/oldBanner.png" />

但我更喜欢做这样的事情：

<mvc:resources mapping="/resources/**" location="classpath:/WEB-INF/web/resources/" />
&
<img src="${pageContext.request.contextPath}/resources/images/banner.png" />

有人可以向我解释我是如何做到这一点的吗？我对spring-mvc相当陌生。

EDIT1：附加数据：我使用的是netbeans 7.1.2，spring-mvc 版本是3.1.0，结合了maven。

下面是 Pom.xml

<!-- groupId config, etc. removed -->
<!-- packaging type is war -->
<properties>
    <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <org.springframework.version>3.1.0.RELEASE</org.springframework.version>
    <org.hibernate.version>3.5.6-Final</org.hibernate.version>
    <org.apache.tiles.version>2.2.2</org.apache.tiles.version>
    <netbeans.hint.deploy.server>Tomcat</netbeans.hint.deploy.server>
    <netbeans.hint.j2eeVersion>1.6</netbeans.hint.j2eeVersion>
</properties>

<repositories>
    <repository>
        <id>com.springsource.repository.bundles.release</id>
        <name>EBR Spring Release Repository</name>
        <url>http://repository.springsource.com/maven/bundles/release</url>
    </repository>
    <repository>
        <id>com.springsource.repository.bundles.external</id>
        <name>EBR External Release Repository</name>
        <url>http://repository.springsource.com/maven/bundles/external</url>
    </repository>    
</repositories>

<dependencies>
    <dependency>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
        <version>1.1.1</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>${org.hibernate.version}</version>
        <exclusions>
            <exclusion>
                <artifactId>slf4j-api</artifactId>
                <groupId>org.slf4j</groupId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-annotations</artifactId>
        <version>${org.hibernate.version}</version>
        <exclusions>
            <exclusion>
                <artifactId>slf4j-api</artifactId>
                <groupId>org.slf4j</groupId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>        
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>${org.hibernate.version}</version>
        <exclusions>
            <exclusion>
                <artifactId>slf4j-api</artifactId>
                <groupId>org.slf4j</groupId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-api</artifactId>
        <version>${org.apache.tiles.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-core</artifactId>
        <version>${org.apache.tiles.version}</version>
        <exclusions>
            <exclusion>
                <artifactId>jcl-over-slf4j</artifactId>
                <groupId>org.slf4j</groupId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.apache.tiles</groupId>
        <artifactId>tiles-jsp</artifactId>
        <version>${org.apache.tiles.version}</version>
    </dependency>
    <dependency>
        <groupId>commons-dbcp</groupId>
        <artifactId>commons-dbcp</artifactId>
        <version>1.4</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.18</version>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.14</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-simple</artifactId>
        <version>1.5.8</version>
    </dependency>
    <dependency>
        <groupId>javax</groupId>
        <artifactId>javaee-api</artifactId>
        <version>6.0</version>
        <scope>provided</scope>
    </dependency>        
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>        
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>3.0-alpha-1</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.10</version>
        <scope>test</scope>
    </dependency>        
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>org.springframework.core</artifactId>
        <version>${org.springframework.version}</version>
    </dependency> 
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>org.springframework.orm</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>org.springframework.web</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>org.springframework.web.servlet</artifactId>
        <version>${org.springframework.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>org.springframework.test</artifactId>
        <version>${org.springframework.version}</version>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.3.2</version>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
                <compilerArguments>
                    <endorseddirs>${endorsed.dir}</endorseddirs>
                </compilerArguments>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.1.1</version>
            <configuration>
                <failOnMissingWebXml>false</failOnMissingWebXml>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <version>2.1</version>
            <executions>
                <execution>
                    <phase>validate</phase>
                    <goals>
                        <goal>copy</goal>
                    </goals>
                    <configuration>
                        <outputDirectory>${endorsed.dir}</outputDirectory>
                        <silent>true</silent>
                        <artifactItems>
                            <artifactItem>
                                <groupId>javax</groupId>
                                <artifactId>javaee-endorsed-api</artifactId>
                                <version>6.0</version>
                                <type>jar</type>
                            </artifactItem>
                        </artifactItems>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

EDIT2：我添加了完整的 MediorkoorVOICES-Web-servlet.xml 和 web.xml

web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/hibernateContext.xml 
            /WEB-INF/applicationContext.xml
        </param-value>
    </context-param>
    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>/WEB-INF/log4j.xml</param-value>
    </context-param>    

    <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <error-page>
        <error-code>404</error-code>
        <location>/errors/404.err</location>
    </error-page>

    <servlet>
        <servlet-name>MediorkoorVOICES-Web</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>    
    <servlet-mapping>
        <servlet-name>MediorkoorVOICES-Web</servlet-name>
        <url-pattern>*.mkvp</url-pattern>
    </servlet-mapping>

    <servlet>
        <servlet-name>MediorkoorVOICES-Admin</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>2</load-on-startup>
    </servlet>    
    <servlet-mapping>
        <servlet-name>MediorkoorVOICES-Admin</servlet-name>
        <url-pattern>*.mkvap</url-pattern>
    </servlet-mapping>

    <servlet>
        <servlet-name>ErrorHandler</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>0</load-on-startup>
    </servlet>    
    <servlet-mapping>
        <servlet-name>ErrorHandler</servlet-name>
        <url-pattern>*.err</url-pattern>
    </servlet-mapping>

    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>redirect.jsp</welcome-file>
    </welcome-file-list>
</web-app>

EDIT3：经过更多测试后，我意识到该<mvc:resources>标签根本不起作用。（查看更新的文件夹结构）例如，如果我这样做：

<mvc:annotation-driven />
<mvc:resources location="/resources/web/" mapping="/resources/**" /> 
&
<a href="${pageContext.request.contextPath}/resources/css/main.css" />click</a>

它也给了我一个 404，而事实上，它应该链接到 /resources/web/css/main.css 文件。所以我现在能想到的就是有一些配置错误。

Answer 1

所以经过大量的调试和“尝试”之后，我尝试将 *.css 和 *.png 映射添加到 web.xml servlet。显然，资源文件没有映射到 servlet，因此无法找到。因此，对于与我具有相同映射的每个人，请将其添加到您的 web.xml servlet-mapping标记中。

<url-pattern>*.css</url-pattern>
<url-pattern>*.png</url-pattern>

Answer 2

这应该有效：

<mvc:resources location="WEB-INF/resources/" mapping="/resources/**" />

您指的是使用 uri 的资源，/resources/somestatic.gif但将从WEB-INF/resources/somestatic.gif

Answer 3

你在做什么是完全错误的。由于您的资源位于文件夹/WEB-INF/web/resources/中，因此您无需在其之前指定classpath:。

所以它就像下面一样

<mvc:resources mapping="/WEB-INF/web/resources/**" location="/WEB-INF/web/resources/"  />

我认为这会解决你的问题。希望这对您有所帮助。干杯。