Java、Spring 将主题属性文件 Hook 到 css 文件

Question

这就是我初始化主题 bean 的方式:

<bean id="themeSource"
class="org.springframework.ui.context.support.ResourceBundleThemeSource">
    <property name="basenamePrefix" value="resources.theme-" />
</bean>

<bean id="themeChangeInterceptor"
    class="org.springframework.web.servlet.theme.ThemeChangeInterceptor">
    <property name="paramName" value="theme" />
</bean>

<bean id="themeResolver"
    class="org.springframework.web.servlet.theme.CookieThemeResolver">
    <property name="defaultThemeName" value="default" />
</bean>

    <bean id="handlerMapping"
    class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
    <property name="interceptors">
        <list>
            <ref bean="localeChangeInterceptor" />
            <ref bean="themeChangeInterceptor" />
        </list>
    </property>
</bean>

这是我的文件夹结构:

这些是我的 3 个属性文件的内部:

css=themes/black.css
css=themes/blue.css
css=themes/default.css

我也尝试过这些:

1. css=classpath:themes/default.css
2. css=/themes/default.css
3. css=./themes/default.css

CSS 是否应该位于 WEB-INF/classes 中？我尝试过将其移出和移入等，但似乎从未完全使其正常工作。

以下是我将其放入 JSP 中的方式:

<link rel="stylesheet" href="<spring:theme code='css'/>" type="text/css" />

现在我的输出如下所示:

这是 JSP 的一部分:

<span style="float: left">
<a href="?theme=default">def</a>
|
<a href="?theme=black">blk</a>
|
<a href="?theme=blue">blu</a>
</span>

这是我的 black.css。

body {
    background-color: #888;
    color: white;
}

我的问题是，CSS 似乎永远不会出现在我的 JSP 文件中。这可能是因为属性文件找不到CSS文件造成的... 请随时询问更多信息。

Answer 1

我认为这有问题。

<bean id="themeSource" class="org.springframework.ui.context.support.ResourceBundleThemeSource"> <property name="basenamePrefix" value="resources.theme-" /> </bean>

根据 Javadoc:

public void setBasenamePrefix(String basenamePrefix)

Set the prefix that gets applied to the ResourceBundle basenames, i.e. the theme names. E.g.: basenamePrefix="test.", themeName="theme" -> basename="test.theme".

Note that ResourceBundle names are effectively classpath locations: As a consequence, the JDK's standard ResourceBundle treats dots as package separators. This means that "test.theme" is effectively equivalent to "test/theme", just like it is for programmatic java.util.ResourceBundle usage.

此外，您还可以将主题属性文件放入 WEB-INF/classes 文件夹中，如引用文档中所述。

By default, the ResourceBundleThemeSource uses an empty base name prefix. As a result, the properties files are loaded from the root of the classpath. Thus you would put the cool.properties theme definition in a directory at the root of the classpath, for example, in /WEB-INF/classes. The ResourceBundleThemeSource uses the standard Java resource bundle loading mechanism, allowing for full internationalization of themes.

我猜你的情况的问题是你已经两次提到了css的路径..一次在<property name="basenamePrefix" value="resources.theme-" />中也进入属性文件

css=themes/black.css
css=themes/blue.css
css=themes/default.css