如何在Spring中使用多个ViewResolver?

正如你所说,你不能把它们连在一起。这两个的javadoc都清楚地指出,它们都必须位于解析器链的末尾。

因此,您可以这样定义自定义ViewResolver:

public class MyViewResolver implements ViewResolver {

    private ViewResolver tilesResolver;
    private ViewResolver jspResolver;

    public void setJspResolver(ViewResolver jspResolver) {
        this.jspResolver = jspResolver;
    }

    public void setTilesResolver(ViewResolver tilesResolver) {
        this.tilesResolver = tilesResolver;
    }

    public View resolveViewName(String viewName, Locale locale) throws Exception {
        if (isTilesView(viewName)) {
            return tilesResolver.resolveViewName(viewName, locale);
        } else {
            return jspResolver.resolveViewName(viewName, locale);
        }
    }

    private boolean isTilesView(String viewName) {
    .....
    }
}

您需要实现isTilesView方法来决定委托给哪个解析器。

之前

<bean class="MyViewResolver">
    <property name="tilesResolver" ref="tilesViewResolver"/>
    <property name="jspResolver" ref="viewResolver"/>
</bean>

我刚刚通过拆分文件解决了同样的问题 *-servlet.xml

app-servlet.xml 仅包含平铺视图解析程序, tests-servlet.xml 仅包含JSP视图解析器和 web.xml

<servlet-mapping>
  <servlet-name>app</servlet-name> <!-- will reach app-servlet.xml -->
  <url-pattern>/foo</url-pattern> <!-- will use "foo" Tile -->
  <url-pattern>/bar</url-pattern> <!-- will use "bar" Tile -->
</servlet-mapping>

<servlet-mapping>
  <servlet-name>tests</servlet-name> <!-- will reach tests-servlet.xml -->
  <url-pattern>/foo-test</url-pattern> <!-- will use foo-test.jsp -->
  <url-pattern>/bar-test</url-pattern> <!-- will use bar-test.jsp -->
</servlet-mapping>

看起来您走的方向是正确的,但要记住的是,某些视图解析程序的行为似乎总是解析视图。您需要确保在订购时将此类解析器放在最后。我相信瓦片的观点就是这样。

编辑:哎呀。。。是的,另一张海报是正确的,这两个解析器都将执行“始终匹配”,因此不能在链中同时使用它们。另一种替代方法是,如果无法找到已配置的平铺视图,则尝试扩展平铺视图以执行简单的JSP呈现。

因此,您可以在同一项目中同时使用“平铺视图解析器”和“内部视图解析器”。

您必须配置ContentNegotingViewResolver。

并在视图解析程序中指定顺序值。

<property name="order" value="int Value here" />

以下是一些适合我的配置。

    <bean
        class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
        <property name="order" value="1" />
        <property name="mediaTypes">
            <map>
                <entry key="json" value="application/json" />
                <entry key="html" value="text/html" />
            </map>
        </property>
        <property name="parameterName" value="accept"></property>
        <property name="favorParameter" value="true"></property>
        <property name="defaultContentType" value="text/html"></property>
        <property name="viewResolvers">
            <list>
                <ref bean="tilesViewResolver" />
                <ref bean="internalViewResolver" />
            </list>
        </property>
        <property name="defaultViews">
            <list>
                <bean
                    class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />
            </list>
        </property>
        <property name="ignoreAcceptHeader" value="true" />
    </bean>

<!--    Configures the Tiles layout system  -->
    <bean class="org.springframework.web.servlet.view.tiles2.TilesConfigurer"
        id="tilesConfigurer">
        <property name="definitions">
            <list>
                <value>/WEB-INF/layouts/layouts.xml</value>
            <!-- Scan views directory for Tiles configurations  -->
                <value>/WEB-INF/views/**/views.xml</value>
            </list>
        </property>
    </bean>
    <bean id="tilesViewResolver"
        class="org.springframework.web.servlet.view.UrlBasedViewResolver"
        p:viewClass="org.springframework.web.servlet.view.tiles2.TilesView">
        <property name="order" value="3" />
    </bean>


    <bean id="internalViewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="order" value="2" />
        <property name="prefix">
            <value>/WEB-INF/views/</value>
        </property>
        <property name="suffix">
            <value>.jsp</value>
        </property>
    </bean>

我通过简单地为普通jsp的布局添加平铺定义来解决这个问题,如下所示:

  <definition name="plain-jsp.layout" template="/WEB-INF/layouts/plainJsp.jspx" >
    <put-attribute name="content" value=""/>
  </definition>

然后您就可以使用这个布局作为包含简单jsp文件的模板。

  <definition name="catalog/details" extends="plain-jsp.layout">
    <put-attribute name="content" value="/WEB-INF/views/catalog/details.jspx"/>
  </definition>

和布局模板文件:

<html xmlns:tiles="http://tiles.apache.org/tags-tiles"
      xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0">

  <jsp:output doctype-root-element="HTML"/>
  <jsp:directive.page contentType="text/html;charset=UTF-8" />  
  <jsp:directive.page pageEncoding="UTF-8" />

  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=8" />      
  </head>
  <body>
    <div id="content">
      <tiles:insertAttribute name="content"/>
    </div>
  </body>
</html>