同时使用 Thymeleaf 和 JSP

Using both Thymeleaf and JSP

我正在使用 JSP + JSTL,但我对 c:if、c:choose、...

感到厌烦

所以,我希望我的 JSP 页面同时使用 JSP 和 Thymeleaf 呈现(我计划尽快删除所有 JSTL)。我正在使用 Spring MVC 框架:

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/pages/" />
    <property name="suffix" value=".jsp" />
    <property name="order" value="1" />
</bean>
<!-- Thymeleaf -->
<bean id="templateResolver" class="org.thymeleaf.templateresolver.ServletContextTemplateResolver">
    <property name="prefix" value="/WEB-INF/pages/" />
    <property name="suffix" value=".html" />
    <property name="templateMode" value="HTML5" />
</bean>
<bean id="templateEngine" class="org.thymeleaf.spring4.SpringTemplateEngine">
    <property name="templateResolver" ref="templateResolver" />
</bean>
<bean class="org.thymeleaf.spring4.view.ThymeleafViewResolver">
    <property name="templateEngine" ref="templateEngine" />
    <property name="order" value="2" />
</bean> 

在我的控制器中,我只是 return jsp 没有扩展名。

return "folder/page";

我的 JSP 页面可以先用 JSP 解析器呈现,然后再用 Thymeleaf 解析器呈现吗?如果是,如何?

好像把JSP和Thymeleaf串起来很复杂。因此,我想对 JSP 文件使用内部解析器,对 HTML 文件使用 Thymeleaf 模板解析器。我该怎么做?

根据 Thymeleaf 论坛上的 this post,您有两种解决方案。

第一个解 :

删除 bean 声明中的后缀 属性<property name="suffix" value=".html" /><property name="suffix" value=".jsp" />)并传递后缀 在您的控制器的 return 值中,例如:

@RequestMapping("/view1")
public String thymeleafView(){
    return "mythymeleafview.html";
}

@RequestMapping("/view2")
public String jspView(){
    return "myjspview.html";
}

第二种解法

viewNames 属性 添加到解析器。该值是包含视图的文件夹的名称,具体取决于它们的扩展名。因此,您将有一个文件夹用于 JSP 文件,另一个文件夹用于 HTML (thymeleaf) 文件,例如:

配置

<bean id="templateResolver" class="org.thymeleaf.templateresolver.ServletContextTemplateResolver">
     <property name="prefix" value="/WEB-INF/views/" />
     <property name="suffix" value=".html" />
     <property name="viewNames" value="thymeleaf/*" />
     <property name="templateMode" value="HTML5" />
</bean>

<bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
     <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
     <property name="prefix" value="/WEB-INF/views/" />
     <property name="viewNames" value="jsp/*" />
     <property name="suffix" value=".jsp" />
</bean>

控制器

@RequestMapping("/view1") 
public String thymeleafView() { 
     return "thymeleaf/mythymeleafview"; 
} 

@RequestMapping("/view2") 
public String jspView() { 
     return "jsp/myjspview"; 
}

项目文件夹

WEB-INF/views/jsp/myjspview.jsp
WEB-INF/views/thymeleaf/mythymeleafview.jsp

这两种解决方案都有效,但有一些限制。您必须指定一种或另一种方式,无论您是想用 JSP 还是 Thymeleaf 解决。

链接 JSP 和 Thymeleaf 的 "perfect" 解决方案 — 这将包括在无法使用 Thymeleaf 或 解析视图时尝试使用 JSP 解析视图反之亦然 — 这是不可能的,Daniel Fernández(Thymeleaf 团队)在 this same post 中解释了原因:

Thymeleaf allows you to create whichever ITemplateResolver implementation you wish, including some that might not allow to determine whether the template exists or not before actually reading it. [...] So, there is no way for Thymeleaf to be sure whether a template will be resolvable or not before trying to process the template. And that's why the ThymeleafViewResolver has to resort to the "viewNames" property.

这里是根据@Igd 的回复

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/pages/" />
    <property name="viewNames" value="*.jsp" />
</bean>
<!-- Thymeleaf -->
<bean id="templateResolver" class="org.thymeleaf.templateresolver.ServletContextTemplateResolver">
    <property name="prefix" value="/WEB-INF/pages/" />
    <property name="templateMode" value="HTML5" />
</bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewNames" value="redirect*" />
</bean>
<bean id="templateEngine" class="org.thymeleaf.spring4.SpringTemplateEngine">
    <property name="templateResolver" ref="templateResolver" />
</bean>
<bean class="org.thymeleaf.spring4.view.ThymeleafViewResolver">
    <property name="templateEngine" ref="templateEngine" />
    <property name="viewNames" value="*.html" />
</bean> 

我将其用于映射:

@RequestMapping("/view1")
public String thymeleafView(){
    return "mythymeleafview.html";
}

@RequestMapping("/view2")
public String jspView(){
    return "myjspview.jsp";
}

或者,两个 servlet 工作正常。关键是保持 servlet 配置最少,并为数据库和其他服务包含一个 appConfig.xml(这避免了大量重复配置)

Web.xml:

<web-app id="WebApp_ID" version="2.4"
   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">

   <display-name>Spring MVC Application</display-name>

   <servlet>
      <servlet-name>AssessmentAdmin</servlet-name>
      <servlet-class>
         org.springframework.web.servlet.DispatcherServlet
      </servlet-class>
      <load-on-startup>1</load-on-startup>
   </servlet>
 <servlet-mapping>
      <servlet-name>AssessmentAdmin</servlet-name>
      <url-pattern>/xz/*</url-pattern>
   </servlet-mapping>
   
   
<servlet>
      <servlet-name>AssessmentAdminTL</servlet-name>
      <servlet-class>
         org.springframework.web.servlet.DispatcherServlet
      </servlet-class>
      <load-on-startup>1</load-on-startup>
   </servlet>   
   <servlet-mapping>
      <servlet-name>AssessmentAdminTL</servlet-name>
      <url-pattern>/xztl/*</url-pattern>
   </servlet-mapping>
   ........

jsp 的 servlet:

<mvc:annotation-driven />
 
 <bean
  class="org.springframework.web.servlet.view.InternalResourceViewResolver">
  <property name="prefix" value="/WEB-INF/jsp/" />
   <!--  <property name="viewNames" value="jsp/*" />-->
    <property name="suffix" value=".jsp" />
 </bean>



 ..........



 
 <import resource="applicationContext.xml" />



</beans>

百里香的 servlet

<mvc:annotation-driven />
 
<!-- Thymeleaf -->

<bean id="templateResolver"
        class="org.thymeleaf.templateresolver.ServletContextTemplateResolver">
    <property name="prefix" value="/WEB-INF/html/" />
    <property name="suffix" value=".html" />
    <property name="templateMode" value="HTML5" />
    <property name="cacheable" value="false" />
  </bean>
    
  <bean id="templateEngine"
        class="org.thymeleaf.spring4.SpringTemplateEngine">
    <property name="templateResolver" ref="templateResolver" />
  </bean>
   
  <bean class="org.thymeleaf.spring4.view.ThymeleafViewResolver">
    <property name="templateEngine" ref="templateEngine" />
  </bean> 
    
 
   
  <bean class="org.thymeleaf.spring4.view.ThymeleafViewResolver">
    <property name="templateEngine" ref="templateEngine" />
  </bean>  
  
  


 
 <import resource="applicationContext.xml" />

试过了,效果很好

根据@Athanor的回答,我们可能还有其他选择。

我们使用 属性 "viewNames" 来控制模板的解析器 select

<!-- jsp -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/" />
    <property name="suffix" value=".jsp" />
    <property name="order" value="1" />
    <property name="viewNames" value="*admin/*,*packer/*,*courier/*,/" />
</bean>
<!-- thymeleaf -->
<bean id="templateResolver" class="org.thymeleaf.templateresolver.ServletContextTemplateResolver">
    <property name="prefix" value="/" />
    <property name="suffix" value=".html" />
    <property name="templateMode" value="HTML5" />
    <property name="cacheable" value="false"/>
</bean>
<bean id="templateEngine" class="org.thymeleaf.spring3.SpringTemplateEngine">
    <property name="templateResolver" ref="templateResolver" />
</bean>
<bean class="org.thymeleaf.spring3.view.ThymeleafViewResolver">
    <property name="characterEncoding" value="UTF-8"/>
    <property name="templateEngine" ref="templateEngine" />
    <property name="viewNames" value="*thymeleaf/*" />
    <property name="order" value="2" />
</bean>

和控制器

@RequestMapping(value="/test")
public ModelAndView dboxPrint(Model model){
    ModelAndView modelAndView = new ModelAndView("thymeleaf/dbox_print");

    return modelAndView;
}