sitemesh和spring装饰器模式问题

Question

我有spring的站点，这是配置: decorator.xml

<?xml version="1.0" encoding="UTF-8"?>
<decorators defaultdir="/styles">
    <excludes>
        <pattern>/exclude.jsp</pattern>
        <pattern>/exclude/*</pattern>
    </excludes>
    <decorator page="application/themeManager/theme.jsp" name="dos">
        <pattern>/*</pattern>
    </decorator>
</decorators>

这是我的web.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    version="2.4">

    <!-- The master configuration file for this Spring web application -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/config/web-application-config.xml
        </param-value>
    </context-param>

    <!-- Enables Spring Security -->
    <filter>
        <filter-name>springSecurityFilterChain</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>springSecurityFilterChain</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>


    <!-- Agregamos el filtro de sitemesh que permite interceptar todas las llamadas que necesitamos -->
    <filter>
        <filter-name>sitemesh</filter-name>
        <filter-class>com.opensymphony.sitemesh.webapp.SiteMeshFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>sitemesh</filter-name>
        <url-pattern>/*</url-pattern>
        <dispatcher>REQUEST</dispatcher>
        <dispatcher>FORWARD</dispatcher>
        <dispatcher>ERROR</dispatcher>
    </filter-mapping>

    <!-- Loads the Spring web application context -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- Serves static resource content from .jar files such as spring-faces.jar -->
    <servlet>
        <servlet-name>Resources Servlet</servlet-name>
        <servlet-class>org.springframework.js.resource.ResourceServlet</servlet-class>
        <load-on-startup>0</load-on-startup>
    </servlet>

    <!-- Map all /resources requests to the Resource Servlet for handling -->
    <servlet-mapping>
        <servlet-name>Resources Servlet</servlet-name>
        <url-pattern>/resources/*</url-pattern>
    </servlet-mapping>

    <!-- The front controller of this Spring Web application, responsible for handling all application requests -->
    <servlet>
        <servlet-name>Spring MVC Dispatcher Servlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value></param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <!-- Map all *.spring requests to the DispatcherServlet for handling -->
    <servlet-mapping>
        <servlet-name>Spring MVC Dispatcher Servlet</servlet-name>
        <url-pattern>/spring/*</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
    </welcome-file-list>

</web-app>

这是可行的，但是当我将decorator.xml中的模式更改为类似

<decorator page="application/themeManager/theme.jsp" name="dos">
    <pattern>/spring/cliente/index</pattern>
</decorator>

它不起作用，我尝试了很多组合，但什么也没有。然后更改web.xml中servlet的映射，如下所示

          Spring MVC Dispatcher Servlet         \*.htm       

并定义如下新模式：

<decorator page="application/themeManager/theme.jsp" name="dos">
    <pattern>/cliente/index.htm</pattern>
</decorator>

它可以工作，那么有什么方法可以使它与servlet的映射一起工作呢？

<servlet-mapping>
    <servlet-name>Spring MVC Dispatcher Servlet</servlet-name>
    <url-pattern>/spring/*</url-pattern>
</servlet-mapping>

Answer 1

问题是SiteMesh使用了Request.getServletPath()，在您的spring应用程序中，它将返回"/spring“所有内容。我是通过实现com.opensymphony.module.sitemesh.DecoratorMapper接口并使用它来代替普通的ConfigDecoratorMapper来发现这一点的。然后，我能够检查用于将装饰者映射到请求的各种参数。不幸的是，我认为这给您留下了唯一的选择，就是在*.html映射中使用DispatcherServelet后缀或其中的某些变体。

另一个选项是配置一个PageDecoratorMapper，并在原始未修饰页面中使用这个标记来指定要使用的布局：

 <meta name="decorator" content="layoutName" /> 

尽管这样，您取消了url映射的好处。

Answer 2

我确实遇到过这个问题。正在发生的情况是，您在web.xml中指定的url路径的任何部分在传递到Spring之前都会被web服务器删除，但前提是必须将通配符放在最后。您已经发现，当您的url是www.myapp.com/spring/cliente/index.html时，如果将它放在您的web.xml中

<servlet-mapping>
   <servlet-name>Spring MVC Dispatcher Servlet</servlet-name>
   <url-pattern>/spring/*</url-pattern>
</servlet-mapping>

Spring只会在/spring之后看到请求路径的部分。在这种情况下，需要将RequestMapping指定为"/cliente/index.html“。

您还可以以这种方式指定servlet映射。

<servlet-mapping>
   <servlet-name>Spring MVC Dispatcher Servlet</servlet-name>
   <url-pattern>*.html</url-pattern>
</servlet-mapping>

然后Spring将看到整个请求路径，您可以指定如下"/spring/cliente/index.html“这样的请求映射。Sitemesh也是如此。它只看到web服务器通过的内容。

Answer 3

也许这对某些人是有用的，我也遇到了同样的问题，在谷歌和存储站点资源的研究之后，通过扩展ConfigDecoratorMapping来解决这个问题。这就是：

/**
 * Created by IntelliJ IDEA.
 * User: Inf-root
 * Date: 30.06.11
 * Time: 1:00
 *
 */

public class ConfigDecoratorMapperSpringMvcSupport extends ConfigDecoratorMapper {

    private static final Logger LOG = Logger.getLogger(ConfigDecoratorMapperSpringMvcSupport.class);

    private ConfigLoader configLoader = null;

     /** Create new ConfigLoader using '/WEB-INF/decorators.xml' file. */
    public void init(Config config, Properties properties, DecoratorMapper parent) throws InstantiationException {
        LOG.debug("init()...");
        super.init(config, properties, parent);
        try {
            String fileName = properties.getProperty("config", "/WEB-INF/decorators.xml");
            configLoader = new ConfigLoader(fileName, config);
        }
        catch (Exception e) {
            throw new InstantiationException(e.toString());
        }
    }

    /** Retrieve {@link com.opensymphony.module.sitemesh.Decorator} based on 'pattern' tag. */
    public Decorator getDecorator(HttpServletRequest request, Page page) {
        LOG.debug("getDecorator()...");
        String thisPath = request.getServletPath();
        LOG.debug("\tThisPath: " + thisPath);
        String requestURI = request.getRequestURI();
        LOG.debug("\t\tGet request URI: " + requestURI);
        //TODO check indexes
        thisPath = "/springURITemplate" + requestURI.substring(request.getContextPath().length(), requestURI.length() - 1);
        LOG.debug("\t\t\tThisPath: " + thisPath);
        String name = null;
        try {
            name = configLoader.getMappedName(thisPath);
        }
        catch (ServletException e) {
            e.printStackTrace();
        }
        LOG.debug("\tResolved decorator name: " + name);
        Decorator result = getNamedDecorator(request, name);
        LOG.debug("Decorator is null ? " + (result == null));
        return result == null ? super.getDecorator(request, page) : result;
    }
}

我的decorators.xml包含这样的东西

<?xml version="1.0" encoding="ISO-8859-1"?>
<decorators defaultdir="/web/decorators">
    <decorator name="admin_decorator" page="admin_decorator.jsp">
        <pattern>/springURITemplate/a/administration*</pattern>
    </decorator>
</decorators>

用Spring3.0.5在tomcat 7上进行测试