解决工作流：org.activiti.engine.ActivitiException: Unknown property used in expression: ${AAAAA}报错

工作流流向有一个以上的流的方向的时候，必须指定流向，默认时用EL表达式表示，比如一个节点既可以流到A5也可以流到A6，当业务需要流向A5 的时候须指定流转条件${A5}

一条流程有多个流转条件的时候，可以写简单的逻辑：

${A30012==true || A40014==true || A50017==true}

当然在逻辑代码里要指定流向的那个节点为true，其他为false，而且这个前面的节点是要切实存在的

 

 报错信息：

java.lang.RuntimeException: org.activiti.engine.ActivitiException: Unknown property used in expression: ${AAAAA}
org.activiti.engine.ActivitiException: Unknown property used in expression: ${AAAAA}
	at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:53)
	at org.activiti.engine.impl.el.UelExpressionCondition.evaluate(UelExpressionCondition.java:53)
	at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performOutgoingBehavior(BpmnActivityBehavior.java:128)
	at org.activiti.engine.impl.bpmn.behavior.BpmnActivityBehavior.performDefaultOutgoingBehavior(BpmnActivityBehavior.java:66)
	at org.activiti.engine.impl.bpmn.behavior.FlowNodeActivityBehavior.leave(FlowNodeActivityBehavior.java:44)
	at org.activiti.engine.impl.bpmn.behavior.AbstractBpmnActivityBehavior.leave(AbstractBpmnActivityBehavior.java:47)
	at org.activiti.engine.impl.bpmn.behavior.UserTaskActivityBehavior.signal(UserTaskActivityBehavior.java:225)
	at org.activiti.engine.impl.persistence.entity.ExecutionEntity.signal(ExecutionEntity.java:411)
	at org.activiti.engine.impl.persistence.entity.TaskEntity.complete(TaskEntity.java:203)
	at org.activiti.engine.impl.cmd.CompleteTaskCmd.execute(CompleteTaskCmd.java:52)
	at org.activiti.engine.impl.cmd.CompleteTaskCmd.execute(CompleteTaskCmd.java:24)
	at org.activiti.engine.impl.cmd.NeedsActiveTaskCmd.execute(NeedsActiveTaskCmd.java:59)
	at org.activiti.engine.impl.interceptor.CommandInvoker.execute(CommandInvoker.java:24)
	at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:57)
	at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47)
	at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
	at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45)
	at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31)
	at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40)
	at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35)
	at org.activiti.engine.impl.TaskServiceImpl.complete(TaskServiceImpl.java:182)
	at com.ai.rai.group.activiti.service.ActivitiHelper.commitProcess(ActivitiHelper.java:131)
	at com.ai.rai.group.activiti.api.impl.ActivitiApi.commitProcess(ActivitiApi.java:60)
	at com.alibaba.dubbo.common.bytecode.Wrapper1.invokeMethod(Wrapper1.java)
	at com.alibaba.dubbo.rpc.proxy.javassist.JavassistProxyFactory$1.doInvoke(JavassistProxyFactory.java:45)
	at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:71)
	at com.alibaba.dubbo.config.invoker.DelegateProviderMetaDataInvoker.invoke(DelegateProviderMetaDataInvoker.java:48)
	at com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:52)
	at com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:61)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:74)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:41)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:77)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:71)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:131)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:37)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:37)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:102)
	at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:96)
	at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:168)
	at com.alibaba.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:50)
	at com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:79)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.activiti.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'AAAAA'
	at org.activiti.engine.impl.juel.AstIdentifier.eval(AstIdentifier.java:83)
	at org.activiti.engine.impl.juel.AstEval.eval(AstEval.java:50)
	at org.activiti.engine.impl.juel.AstNode.getValue(AstNode.java:26)
	at org.activiti.engine.impl.juel.TreeValueExpression.getValue(TreeValueExpression.java:114)
	at org.activiti.engine.impl.delegate.ExpressionGetInvocation.invoke(ExpressionGetInvocation.java:33)
	at org.activiti.engine.impl.delegate.DelegateInvocation.proceed(DelegateInvocation.java:37)
	at org.activiti.engine.impl.delegate.DefaultDelegateInterceptor.handleInvocation(DefaultDelegateInterceptor.java:25)
	at org.activiti.engine.impl.el.JuelExpression.getValue(JuelExpression.java:50)
	... 51 more

	at com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:105)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:74)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:41)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:77)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:71)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:131)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:37)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:37)
	at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:68)
	at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:102)
	at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:96)
	at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:168)
	at com.alibaba.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:50)
	at com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:79)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)