一尘不染

具有多个视图解析器的Spring MVC

spring

我尝试使用2个视图解析器:

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

    <context:component-scan base-package="com.evgeni.dfr.controller" />

    <context:annotation-config />
    <mvc:annotation-driven />

    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="cache" value="false" />
        <property name="viewClass" value="com.evgeni.drf.faces.FacesView" />
        <property name="prefix" value="/WEB-INF/pages/" />
        <property name="suffix" value=".xhtml" />

        <property name="order" value="1" />
    </bean>

    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix">
            <value>/WEB-INF/views/</value>
        </property>
        <property name="suffix">
            <value>.jsp</value>
        </property>
        <property name="order" value="0" />
    </bean>
</beans>

该应用程序始终仅使用顺序最低的一个,而不使用另一个。在当前情况下,如果我的控制器返回“ someView”,则The requested resource (/MyProject/WEB-INF/views/someView.jsp) is not available.即使存在“ pages / someView.xhtml” ,应用也会响应。

Spring version - 3.2.3

编辑:如果我在控制器中有2个方法,并且methodA返回“ viewA”,而methodB返回“ viewB”。我们在“ views”文件夹中有viewA.jsp,在“ pages”中有viewB.xhtml。

情况1:UrlBasedViewResolver-> order = 1,InternalResourceViewResolver-> order = 2

methodA-> The requested resource (/MyProject/WEB-INF/pages/viewA.xhtml) is not available.;

methodB -> OK

情况2:UrlBasedViewResolver-> order = 2,InternalResourceViewResolver-> order = 1

方法A->确定;

methodB -> `The requested resource (/MyProject/WEB-INF/views/viewB.jsp) is not available.`;

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2020-04-18

共1个答案

一尘不染

我认为你误解了订单优先级。该ViewResolver最高顺序是链中最后一个解析器。由于你给的InternalResourceViewResolver订单是0,因此它将成为链中的第一个解析器,并且InternalResourceViewResolver无论返回什么视图名称,都会解析该视图。因此,如果要使用多个解析器,则InternalResourceViewResolver必须是顺序最高的解析器。

InternalResourceViewResolver订单值更改为2:

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

    <context:component-scan base-package="com.evgeni.dfr.controller" />

    <context:annotation-config />
    <mvc:annotation-driven />

    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="cache" value="false" />
        <property name="viewClass" value="com.evgeni.drf.faces.FacesView" />
        <property name="prefix" value="/WEB-INF/pages/" />
        <property name="suffix" value=".xhtml" />
        <property name="order" value="1" />
    </bean>

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

编辑:

检查javadoc后,似乎这两个解析程序无法链接,因为InternalResourceViewResolverUrlBasedViewResolver(InternalResourceViewResolver扩展了UrlBasedViewResolver)。两个解析器始终与返回值匹配。我认为你将需要一些自定义功能才能执行此操作。

2020-04-18