activities包括哪些項目，Activiti（一）SpringBoot2集成Activiti6

Activiti是領先的輕量級的，以Java為中心的開源BPMN（Business Process Modeling Notation）引擎，實現了真正的流程自動化。下面介紹如何在SpringBoot環境下使用Maven集成Activiti6，來實現流程開發。

添加依賴

<dependency><groupId>org.activiti</groupId><artifactId>activiti-spring-boot-starter-basic</artifactId><version>6.0.0</version>
</dependency>
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>

添加Processes目錄

SpringBoot集成activiti默認會從classpath下的processes目錄下讀取流程定義文件，所以需要在src/main/resources目錄下添加processes目錄，并在目錄中創建流程文件，添加目錄后，目錄結構變為：

activities包括哪些項目、?

如果沒有processes目錄，則需要修改配置spring.activiti.process-definition-location-prefix，指定流程文件存放目錄。

Spring集成Activiti6默認支持**.bpmn20.xml和**.bpmn格式的流程定義文件，修改支持的文件格式，通過配置spring.activiti.process-definition-location-suffixes修改

spring工作流框架推薦。如：

spring:activiti:check-process-definitions: true #自動檢查、部署流程定義文件database-schema-update: true #自動更新數據庫結構process-definition-location-prefix: classpath:/processes/ #流程定義文件存放目錄#process-definition-location-suffixes: #流程文件格式#  - **.bpmn20.xml#  - **.bpmn

啟動項目時，如果沒有流程部署，就不能通過自動注入，使用RuntimeService等API，依賴注入時后報錯。

ActivitiProperties中定義了activiti的自動配置項，其他配置請查看ActivitiProperties屬性。

添加數據源

添加數據源，項目中添加數據源，初始化數據庫結構，后續保存流程數據，

spring :#data source configdatasource :driver : com.mysql.jdbc.Driverurl: jdbc:mysql://192.168.105.10:3306/test_db?useUnicode=true&characterEncoding=utf8&useSSL=false&allowMultiQueries=trueusername : rootpassword : mysqlinitsize : 10maxActive : 20minIdle : 10maxWait : 120000poolPreparedStatements : falsemaxOpenPreparedStatements : -1validationQuery : select 1testOnborrow : truetestOnReturn : truetestWhileIdle : truetimeBetweenEvictionRunsMillis : 120000filters : log4j,stat

添加流程

在項目中添加流程，創建文件simple.bpmn，添加內容

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" xmlns:tns="Examples" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" expressionLanguage="http://www.w3.org/1999/XPath" id="m1539757531057" name="" targetNamespace="Examples" typeLanguage="http://www.w3.org/2001/XMLSchema"><process id="oneTaskProcess" isClosed="false" name="The One Task Process" processType="None"><startEvent id="theStart"/><sequenceFlow id="flow1" sourceRef="theStart" targetRef="theTask"/><userTask activiti:assignee="${user}" activiti:exclusive="true" id="theTask" name="my task"/><sequenceFlow id="flow2" sourceRef="theTask" targetRef="theEnd"/><endEvent id="theEnd"/></process>
</definitions>

啟動測試

編寫SpringBoot啟動類，啟動項目，啟動項目。

@SpringBootApplication(scanBasePackages = "com.legao.server")
@EnableSwagger2
public class WorkflowServer {public static void main(String[] args) {SpringApplication.run(WorkflowServer.class, args);}
}

啟動時，發現啟動報錯，

Caused by: java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxyCaused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Invocation of init method failed; nested exception is java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy

spring整合activiti、查看activiti-spring-boot-starter-basic-6.0.0.jar發現，org.activiti.spring.boot.SecurityAutoConfiguration編譯報錯，這時候將SecurityAutoConfiguration排除到SpringBoot啟動之外，即@SpringBootApplication注解添加exclude = SecurityAutoConfiguration.class屬性

@SpringBootApplication(scanBasePackages = "com.legao.server", exclude = SecurityAutoConfiguration.class)
@EnableSwagger2
public class WorkflowServer {public static void main(String[] args) {SpringApplication.run(WorkflowServer.class, args);}
}

再啟動發現啟動正常，這時候SpringBoot集成activiti已經啟動成功，查看數據庫，Activiti6運行所需的28張表也已經創建成功。

ACT_EVT_LOG
ACT_GE_BYTEARRAY
ACT_GE_PROPERTY
ACT_HI_ACTINST
ACT_HI_ATTACHMENT
ACT_HI_COMMENT
ACT_HI_DETAIL
ACT_HI_IDENTITYLINK
ACT_HI_PROCINST
ACT_HI_TASKINST
ACT_HI_VARINST
ACT_ID_GROUP
ACT_ID_INFO
ACT_ID_MEMBERSHIP
ACT_ID_USER
ACT_PROCDEF_INFO
ACT_RE_DEPLOYMENT
ACT_RE_MODEL
ACT_RE_PROCDEF
ACT_RU_DEADLETTER_JOB
ACT_RU_EVENT_SUBSCR
ACT_RU_EXECUTION
ACT_RU_IDENTITYLINK
ACT_RU_JOB
ACT_RU_SUSPENDED_JOB
ACT_RU_TASK
ACT_RU_TIMER_JOB
ACT_RU_VARIABLE

（完）