java 如何在spring webflow中实现Switch/if else if语句？
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How to implement Switch/if else if statement in spring webflow?
提问by user1938073
Have implemented switch statement as below.
已实现如下 switch 语句。
Could you please verify and correct it if there is any wrong?
如果有错误，请您核实并纠正它吗？
<set name="flowScope.Valid" value="true">
<decision-state id="isDNCheckNotRequired" test="Valid == true">
<transition on="true" to="even"/>
<transition on="false" to="odd"/>
</decision-state>
<action-state id="even">
<evaluate expression="Test.setEven(true)">
</action-state>
<action-state id="odd">
<evaluate expression="Test.set(false)">
</action-state>
And please let me know is this way of implementation supports in spring webflow 2.0
请让我知道这种实现方式在 spring webflow 2.0 中是否支持
Thanks in advance.
提前致谢。
回答by ?ukasz Rzeszotarski
Quoting the documentation
引用文档
for decision states
对于决策状态
<decision-state id="moreAnswersNeeded">
<if test="interview.moreAnswersNeeded()" then="answerQuestions" else="finish" />
</decision-state>
as an alternative for
作为替代
<action-state id="moreAnswersNeeded">
<evaluate expression="interview.moreAnswersNeeded()" />
<transition on="yes" to="answerQuestions" />
<transition on="no" to="finish" />
</action-state>
Analogically for view states
类似地用于视图状态
<view-state id="uploadFile" model="uploadFileHandler">
<var name="fileUploadHandler" class="org.springframework.webflow.samples.booking.FileUploadHandler" />
<transition on="upload" to="finish" >
<evaluate expression="fileUploadHandler.processFile()"/>
</transition>
<transition on="cancel" to="finish" bind="false"/>
</view-state>
See: http://docs.spring.io/spring-webflow/docs/2.3.4.RELEASE/reference/html/actions.html#decision-state
请参阅：http: //docs.spring.io/spring-webflow/docs/2.3.4.RELEASE/reference/html/actions.html#decision-state
