根据官网报错：
org.flowable.common.engine.api.FlowableException: Could not find org.flowable.http.HttpActivityBehavior: at org.flowable.engine.impl.bpmn.parser.factory.DefaultActivityBehaviorFactory.createHttpActivityBehaviorCaused by: java.lang.ClassNotFoundException: org.flowable.http.bpmn.impl.HttpActivityBehaviorImpl at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
解决：
- 该类在flowable-http里！
- flowable-spring-boot-starter中不包含该jar
- 查看flowable所有的starter
- 找不到像的
- 使用：
-
<!-- https://mvnrepository.com/artifact/org.flowable/flowable-http -->
调用REST报错：
org.flowable.common.engine.api.FlowableException: Unknown property used in expression: ${requestTimeout} at org.flowable.common.engine.impl.el.JuelExpression.getValue(JuelExpression.java:50)Caused by: org.flowable.common.engine.impl.javax.el.PropertyNotFoundException: Cannot resolve identifier 'requestTimeout' at org.flowable.common.engine.impl.de.odysseus.el.tree.impl.ast.AstIdentifier.eval(AstIdentifier.java:97) 解决：
- requestTimeout需作为入参传入。
Caused by: org.apache.http.impl.execchain.RequestAbortedException: Request aborted at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:180)
解决：
- requestTimeout设置了1，1毫秒太短，requestTimeout改为1000.
org.springframework.web.HttpMediaTypeNotAcceptableException: Could not parse 'Accept' header [text/html Cache-Control: no-cache]: Invalid mime type "text/html Cache-Control: no-cache": Invalid token character ' ' in token "html Cache-Control: no-cache" at org.springframework.web.accept.HeaderContentNegotiationStrategy.resolveMediaTypes(HeaderContentNegotiationStrategy.java:59)
- Accept: text/html Cache-Control: no-cache
- Accept: application/json Cache-Control: no-cache text/html改application/json还是错
org.springframework.web.HttpMediaTypeNotAcceptableException: Could not parse 'Accept' header [application/json Cache-Control: no-cache]: Invalid mime type "application/json Cache-Control: no-cache": Invalid token character ' ' in token "json Cache-Control: no-cache"
解决：
- Cache-Control: no-cache删掉。