blocks|key|1185117|text|我的建议是在控制器中执行此操作。服务应该具有可重用的逻辑，并且不依赖于视图模板，将这项工作留给控制器。使用该服务获取需要传递给模板的数据，但将与模板交互的工作留给控制器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1185118|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

My advice would be to do this in the controller. Service should have reusable logic and not depend on a view template, leave that work to the controller. Use the service to get the data you need to pass to the template, but leave the work of interacting with the template to the controller.

blocks|key|1400667|text|我完全同意John的观点--在服务中实现GSP通常是一个糟糕的设计决策。但是没有例外的规则！如果您仍然想这样做，请尝试以下方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1400668|class+MyService+implements+InitializingBean+{
++++boolean+transactional+=+false
++++def+gspTagLibraryLookup++//+being+automatically+injected+by+spring
++++def+g

++++public+void+afterPropertiesSet()+{
++++++++g+=+gspTagLibraryLookup.lookupNamespaceDispatcher("g")
++++++++assert+g
++++}

++++def+serviceMethod()+{++++
+++++++//+do+anything+with+e.g.+g.render
++++}
}|code-block|syntax|javascript|1400669|当然，使用gspTagLibraryLookup+bean可以访问服务中所有其他所需的标记库。|1400670|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I totally agree with John's argumentation - doing GSP in services is generally a bad design decision. But no rules without exceptions! If you still want to do this, try the following approach:

<pre><code>class MyService implements InitializingBean {
 boolean transactional = false
 def gspTagLibraryLookup // being automatically injected by spring
 def g

 public void afterPropertiesSet() {
 g = gspTagLibraryLookup.lookupNamespaceDispatcher("g")
 assert g
 }

 def serviceMethod() { 
 // do anything with e.g. g.render
 }
}
</code></pre>

Using the gspTagLibraryLookup bean you can of course access every other desired taglib in a service.

blocks|key|1400743|text|这里有一个类似于Stefan's的解决方案，但更简单一些|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1400744|import+org.codehaus.groovy.grails.plugins.web.taglib.ApplicationTagLib
import+org.springframework.context.ApplicationContext
import+org.springframework.context.ApplicationContextAware

class+MyService+implements+ApplicationContextAware+{

++++private+ApplicationTagLib+g

++++void+setApplicationContext(ApplicationContext+applicationContext)+{
++++++++g+=+applicationContext.getBean(ApplicationTagLib)

++++++++//+now+you+have+a+reference+to+g+that+you+can+call+render()+on
++++}
}|code-block|syntax|javascript|1400745|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/1777640/using-g-render-in-a-grails-service/1778991#1778991^0|8|8|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Here's a solution that's similar to <a href="https://stackoverflow.com/questions/1777640/using-g-render-in-a-grails-service/1778991#1778991">Stefan's</a>, but a bit simpler

<pre><code>import org.codehaus.groovy.grails.plugins.web.taglib.ApplicationTagLib
import org.springframework.context.ApplicationContext
import org.springframework.context.ApplicationContextAware

class MyService implements ApplicationContextAware {

 private ApplicationTagLib g

 void setApplicationContext(ApplicationContext applicationContext) {
 g = applicationContext.getBean(ApplicationTagLib)

 // now you have a reference to g that you can call render() on
 }
}
</code></pre>

blocks|key|1185300|text|在带有PageRenderer的Grails+2中，这甚至更简单。例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1185301|class+SomeService+{
++++def+groovyPageRenderer

++++void+someMethod()+{
++++++++String+html+=+groovyPageRenderer.render(view:+'/email/someTemplateName')
++++}
}|code-block|syntax|javascript|1185302|API+-+http://grails.org/doc/latest/api/grails/gsp/PageRenderer.html|offset|length|1185303|更完整的示例-+http://mrhaki.blogspot.com/2012/03/grails-goodness-render-gsp-views-and.html|1185304|entityMap|0|LINK|mutability|MUTABLE|url|http://grails.org/doc/latest/api/grails/gsp/PageRenderer.html|1|http://mrhaki.blogspot.com/2012/03/grails-goodness-render-gsp-views-and.html^0|0|0|6|1P|0|0|8|24|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@$I|Z|J|10|1|11]]|A|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@$I|13|J|14|1|15]]|A|$]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]|U|$5|P|Q|R|A|$S|V]]]]

It's even simpler now in Grails 2 with the PageRenderer. e.g.:

<pre><code>class SomeService {
 def groovyPageRenderer

 void someMethod() {
 String html = groovyPageRenderer.render(view: '/email/someTemplateName')
 }
}
</code></pre>

API - <a href="http://grails.org/doc/latest/api/grails/gsp/PageRenderer.html" rel="noreferrer">http://grails.org/doc/latest/api/grails/gsp/PageRenderer.html</a>

More complete example - <a href="http://mrhaki.blogspot.com/2012/03/grails-goodness-render-gsp-views-and.html" rel="noreferrer">http://mrhaki.blogspot.com/2012/03/grails-goodness-render-gsp-views-and.html</a>

I'm trying to use g.render in a grails service, but it appears that g is not provided to services by default. Is there a way to get the templating engine to render a view in the service? I may be going about this the wrong way. What I'm looking to to is render the view from a partial template to a string, and send the resulting string back as part of a JSON response to be used with AJAX updates.

Any thoughts?

Using g.render in a grails service

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

我正尝试在grails服务中使用g.render，但似乎在默认情况下没有为服务提供g。有没有办法让模板引擎在服务中呈现视图？我可能走错了路。我希望将视图从部分模板呈现为字符串，并将生成的字符串作为JSON响应的一部分发回，以便与AJAX更新一起使用。有什么想法吗？

问在grails服务中使用g.render
EN

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问在grails服务中使用g.renderEN