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我從春季Web流程開始,閱讀並遵循文檔。我創建了一個新的流程:春季Web流程,創建子流程與輸入字段
測試flow.xml
<?xml version="1.0" encoding="UTF-8"?>
<flow xmlns="http://www.springframework.org/schema/webflow"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/webflow
http://www.springframework.org/schema/webflow/spring-webflow-2.0.xsd">
<var name="testName" class="com.project.TestView" />
<view-state id="test">
<on-entry>
<set name="flowScope.name" value="testName.name" />
</on-entry>
<transition on="test" to="saveName"/>
</view-state>
<subflow-state id="subTest" subflow="testSub-flow">
<input name="nameVar" value="name" />
<transition to="error" />
</subflow-state>
<view-state id="error" />
<end-state id="finish" />
</flow>
,我試圖創建一個testSub-flow.xml
<?xml version="1.0" encoding="UTF-8"?>
<flow xmlns="http://www.springframework.org/schema/webflow"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/webflow
http://www.springframework.org/schema/webflow/spring-webflow-2.0.xsd">
<input type="String" name="nameVar" />
<on-start>
<evaluate expression="com.project.TestView.printSomething(nameVar)" result="flowScope.testPrint" />
</on-start>
<view-state id="printTest" >
<transition on="restart" to="endSub" />
</view-state>
<end-state id="endSub" />
</flow>
調用的方法是:
@Transactional(readOnly = true)
public String printSomething(String text){
System.out.print(text + " this is a test");
return text + " this is a test";
}
我得到一些例外,當它加載主流瀏覽器,test-flow.xml
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.webflow.execution.ActionExecutionException: Exception thrown executing [[email protected] targetAction = [[email protected] expression = com.project.TestView.printSomething(nameVar), resultExpression = flowScope.testPrint], attributes = map[[empty]]] in state 'null' of flow 'test' -- action execution attributes were 'map[[empty]]'
可能是什麼問題?提前致謝。
該表達式期望存在一個id爲com.project.TestView的spring bean。是這樣嗎?這個例外應該稍微多一點 - 一個堆棧跟蹤可能會告訴你它是由EvaluationExpression引起的。無論您的異常處理機制是什麼,這件作品都可能被吞噬。 – kevin