简介：本文内容由看球吧整理编辑，主要讲解的内容是：文章目录一. Activiti相关概念1. Activiti介绍2. 核心类2.1 ProcessEngine2.2 服务(Service)类2.2.1 TaskService2.2.2 RepositoryService2.2.3 RuntimeService2.2.3 HistoryService2.3 CommandContextIntercepter或CommandExecutor2.4 核心业......的相关信息，具体详情阅读下文。
Activiti是基于Apache许可的开源BPM平台，创始人Tom Baeyens原是JBPM架构师，可以理解为与JBPM出自同一祖师爷。它提供了Eclipse插件，开发可以通过插件直接绘制业务流程图。基于Spring，ibatis等框架，并在此之上构建了非常清晰的开发框架。是由Alfresco软件发布的业务流程管理（BPM）框架，它是覆盖了业务流程管理、工作流、服务协作等领域的一个开源的、灵活的、易扩展的可执行流程语言框架。 本文基于Activiti7的Activiti Core，基于Spring Boot做简单学习总结。（Activiti最新版本向微服务这边靠齐了，并分Activiti Core与Activiti Cloud两块，Activiti Cloud还没研究）
流程引擎的抽象，可以通过此类获取需要的所有服务。
通过ProcessEngine获取，Activiti将不同生命周期的服务封装在不同Service中，包括定义、部署、运行。通过服务类可获取相关生命周期中的服务信息。
流程运行过程中，每个任务节点的相关操作接口，如complete,delete,delegate等。
流程定义和部署相关的存储服务。
流程运行时相关的服务，如根据流程好启动流程实例startProcessInstanceByKey。
历史记录相关服务接口。
Activiti使用命令模式作为基础开发模式，如Service中调用的各个方法都对应相应的命令对象。Service将请求委托给命令对象，命令对象来命令接受者，接受者接收后执行并返回结果。而CommandContextIntercepter的作用是拦截所有命令，并在命令前后执行一些公共方法。
org.activiti.engine.impl.persistence.entity包下的类，包括Task，ProcessInstance，Execution等。会根据不同职责实现相应接口的方法(如需要持久化则继承PersistentObject接口)，与传统的实体类不同。
用来保存生命周期比较长，全局性的信息，类似Application，主要包括如下三类。
命令上下文，保存每个命令必要的资源，如持久化需要的session。
流程引擎相关配置信息，整个引擎全局的配置信息，如数据源DataSource等。该对象为单例，在流程引擎创建的时候初始化。
持有ExecutionEntity对象。
Activiti使用ibatis作OR映射，并在此基础上增加设计了自己的持久化框架。在流程引擎创建时初始化。顶层接口Session、SessionFactory。Session有两个实现类：DbSqlSession，负责sql表达式的执行。AbstractManager负责对象的持久化操作。SessionFactory有两个实现类：DbSqlSessionFactory负责DbSqlSession相关操作，GenericManagerFactory负责AbstractManager相关操作。
Activiti允许客户代码介入流程执行，提供了事件监听组件。监听的事件类型可以分为TaskListener、JavaDelegate、Expression、ExecutionListener。ProcessEngineConfigurationImpl持有DelegateInterceptor的某个实例，方便调用handleInvocation。
DbSqlSession中有cache的实现，Activiti基于List和Map来做缓存。如查询时先查缓存，没有则直接查询并放入缓存。
Activiti可以执行任务，JobExecutor为启核心类，JobExecutor包含三个主要属性：JobAcquisitionThread，BlockingQueue，ThreadPoolExecutor。方法ProcessEngines在引擎启动时调用JobExecutor.start，JobAcquisitionThread 线程即开始工作，其run方法不断循环执行AcquiredJobs中的job，执行一次后线程等待一定时间直到超时或者JobExecutor.jobWasAdded方法，因为有新任务而被调用。
流程虚拟机API暴露了流程虚拟机的POJO核心，流程虚拟机API描述了一个工作流流程必备的组件，这些组件包括：
PvmProcessDefinition：流程的定义，形象点说就是用户画的那个图。静态含义。
PvmProcessInstance：流程实例，用户发起的某个PvmProcessDefinition的一个实例，动态含义。
PvmActivity：流程中的一个节点
PvmTransition：衔接各个节点之间的路径，形象点说就是图中各个节点之间的连接线。
PvmEvent：流程执行过程中触发的事件
我的Eclipse版本如下：
下载离线安装包（在线安装始终失败，应该出于网络限制），地址：http://www.activiti.org/designer/archived/activiti-designer-5.18.0.zip
离线安装包安装安装依然提示相关包找不到，于是下载另外三个依赖包（org.eclipse.emf.transaction_1.4.0.v20100331-1738.jar、org.eclipse.emf.validation_1.7.0.201306111341.jar、org.eclipse.emf.workspace_1.5.1.v20120328-0001.jar，在Maven仓库可以找到），放到Eclipse的plugin目录下，继续安装，如下：
确定后勾选相关选项，完成安装，重启Eclipse，New->Other
出现以上标志，则安装完成。
（我的Eclipse已经安装Spring Boot插件）
然后Next->Next…->Finish即可，然后改application.properties为application.yml（个人习惯）
在pom属性中定义版本号，并添加Activiti相关依赖：
<activiti-dependencies.version>7.0.56</activiti-dependencies.version><dependencyManagement> <dependencies> <dependency> <groupId>org.activiti.dependencies</groupId> <artifactId>activiti-dependencies</artifactId> <version>${activiti-dependencies.version}</version> <scope>import</scope> <type>pom</type> </dependency> </dependencies></dependencyManagement><dependency> <groupId>org.activiti</groupId> <artifactId>activiti-spring-boot-starter</artifactId></dependency>由于Activiti默认使用H2数据库，所以需添加H2数据库支持（这里使用此SpringBoot版本默认1.4.197）：
<dependency> <groupId>com.h2database</groupId> <artifactId>h2</artifactId></dependency>出现错误：Missing artifact org.activiti:activiti-spring-boot-starter:jar:7.0.56
添加私服仓库地址：
<repositories> <repository> <id>alfresco</id> <name>Activiti Releases</name> <url>https://artifacts.alfresco.com/nexus/content/repositories/activiti-releases/</url> <releases> <enabled>true</enabled> </releases> </repository></repositories>
错误消失。
在此版本Activiti+SpringBoot，默认加载/processes/目录下流程，于是在resources下新建processes目录，并在目录下new->Other，如下：
使用Activiti图编辑工具打开，创建如下流程（创建过程在此不介绍，就是右侧工具栏的运用）：
看日志：
从日志中可以看出，流程引擎已经默认创建，并可以看到使用的默认数据源是H2的数据源，我们创建的流程也已经部署。
在正常使用中，一般系统会有自己的数据库，而不会采用默认内存的H2数据库，这里以MySQL为例。修改application.yml。
<!--使用mysql数据库,导入mysql驱动--><dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId></dependency>spring: ##数据库连接信息 datasource: # 数据源配置 url: jdbc:mysql://127.0.0.1:3306/activity?useUnicode=true&characterEncoding=utf-8&useSSL=false username: root password: root driver-class-name: com.mysql.jdbc.Driver # SQLException: XAER_INVAL: Invalid arguments (or unsupported command)问题 xa: properties: pinGlobalTxToPhysicalConnection: true useServerPrepStmts: true # 参考配置https://www.cnblogs.com/liaojie970/p/8857710.html activiti: # 自动建表 database-schema: ACTIVITI database-schema-update: true history-level: full db-history-used: true 注意：
database-schema-update表示启动时检查数据库表，不存在则创建
history-level表示哪种情况下使用历史表，这里配置为full表示全部记录历史，方便绘制流程图
db-history-used为true表示使用历史表，如果不配置，则工程启动后可以检查数据库，只建立了17张表，历史表没有建立，则流程图及运行节点无法展示（暂未找到可行方式）
# 服务配置server: display-name: actdemo port: 8085# Spring相关配置spring:##数据库连接信息 datasource:# 数据源配置 url: jdbc:mysql://127.0.0.1:3306/activity?useUnicode=true&characterEncoding=utf-8&useSSL=false username: root password: 888 driver-class-name: com.mysql.jdbc.Driver<span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"># SQLException: XAER_INVAL: Invalid arguments (or unsupported command)问题</span></span></span></span> xa: properties: pinGlobalTxToPhysicalConnection: true useServerPrepStmts: true thymeleaf: mode: HTML encoding: utf-8# 禁用缓存 cache: false application:# 注册应用名 name: actdemo mvc:# 静态资源路径 static-path-pattern: /static/**# 参考配置https://www.cnblogs.com/liaojie970/p/8857710.html activiti:# 自动建表 database-schema: ACTIVITI database-schema-update: true history-level: full db-history-used: true<span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"># SQLException: XAER_INVAL: Invalid arguments (or unsupported command)问题</span></span></span></span>观察日志，流程引擎已成功加载，并已使用MySQL数据库，如下：
再看数据库，已经创建25张表（老版本的Activiti创建表有手动执行SQL和通过调用流程引擎创建两种方式，该版本与SpringBoot整合后，启动默认创建需要的表）：
注意：
原SpringBoot工程使用版本2.1.1.RELEASE，启动始终失败，各种错误，后改为2.0.4.RELEASE版本，则启动正常。
本例子使用Thymeleaf做前端页面展示（SpringBoot推荐使用），并创建控制器Controller调用工作流接口与前端交互。
<!-- Thymeleaf依赖 --><dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId></dependency>创建启动流程方法，主要代码如下
/** * <p>启动请假流程</p> * @return String 流程实例ID * @author FRH * @time 2018年12月10日上午11:03:36 * @version 1.0 */ @RequestMapping(value="/start") @ResponseBody public String start() { // xml中定义的ID String instanceKey = "leaveProcess"; logger.info("开启请假流程..."); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 设置流程参数，开启流程</span></span></span></span> <span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in">Map</span></span></span></span><<span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in">String</span></span></span></span>,<span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in">Object</span></span></span></span>> map = <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">new</span></span></span></span> HashMap<<span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in">String</span></span></span></span>,<span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in">Object</span></span></span></span>>(); map.put(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"jobNumber"</span></span></span></span>,<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"A1001"</span></span></span></span>); map.put(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"busData"</span></span></span></span>,<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"bus data"</span></span></span></span>); ProcessInstance instance = runtimeService.startProcessInstanceByKey(instanceKey, map);<span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">//使用流程定义的key启动流程实例，key对应helloworld.bpmn文件中id的属性值，使用key值启动，默认是按照最新版本的流程定义启动</span></span></span></span> logger.info(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"启动流程实例成功:{}"</span></span></span></span>, instance); logger.info(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"流程实例ID:{}"</span></span></span></span>, instance.getId()); logger.info(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"流程定义ID:{}"</span></span></span></span>, instance.getProcessDefinitionId()); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">//验证是否启动成功</span></span></span></span> <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">//通过查询正在运行的流程实例来判断</span></span></span></span> ProcessInstanceQuery processInstanceQuery = runtimeService.createProcessInstanceQuery(); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">//根据流程实例ID来查询</span></span></span></span> <span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in">List</span></span></span></span><ProcessInstance> runningList = processInstanceQuery.processInstanceId(instance.getProcessInstanceId()).list(); logger.info(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"根据流程ID查询条数:{}"</span></span></span></span>, runningList.size()); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 返回流程ID</span></span></span></span> <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">return</span></span></span></span> instance.getId();} <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 设置流程参数，开启流程</span></span></span></span> <span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in">Map</span></span></span></span><<span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in">String</span></span></span></span>,<span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in">Object</span></span></span></span>> map = <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">new</span></span></span></span> HashMap<<span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in">String</span></span></span></span>,<span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in">Object</span></span></span></span>>(); map.put(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"jobNumber"</span></span></span></span>,<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"A1001"</span></span></span></span>); map.put(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"busData"</span></span></span></span>,<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"bus data"</span></span></span></span>); ProcessInstance instance = runtimeService.startProcessInstanceByKey(instanceKey, map);<span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">//使用流程定义的key启动流程实例，key对应helloworld.bpmn文件中id的属性值，使用key值启动，默认是按照最新版本的流程定义启动</span></span></span></span> logger.info(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"启动流程实例成功:{}"</span></span></span></span>, instance); logger.info(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"流程实例ID:{}"</span></span></span></span>, instance.getId()); logger.info(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"流程定义ID:{}"</span></span></span></span>, instance.getProcessDefinitionId()); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">//验证是否启动成功</span></span></span></span> <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">//通过查询正在运行的流程实例来判断</span></span></span></span> ProcessInstanceQuery processInstanceQuery = runtimeService.createProcessInstanceQuery(); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">//根据流程实例ID来查询</span></span></span></span> <span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in"><span class="hljs-built_in">List</span></span></span></span><ProcessInstance> runningList = processInstanceQuery.processInstanceId(instance.getProcessInstanceId()).list(); logger.info(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"根据流程ID查询条数:{}"</span></span></span></span>, runningList.size()); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 返回流程ID</span></span></span></span> <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">return</span></span></span></span> instance.getId();}Activiti流程图展示，使用流程图生成器，本例生成的流程图在页面使用如下方式展示即可：
<embed src="/demo/showImg?instanceId=5070fd58-f859-11e8-a359-484d7ec5762d" style="display:block;width:1000px;height:450px" />引入相关工具包，版本使用默认版本7.0.65
<!-- Activiti生成流程图 --><dependency> <groupId>org.activiti</groupId> <artifactId>activiti-image-generator</artifactId></dependency>调用输出流程图
/** * <p>查看当前流程图</p> * @param instanceId 流程实例 * @param response void 响应 * @author FRH * @time 2018年12月10日上午11:14:12 * @version 1.0 */ @ResponseBody @RequestMapping(value="/showImg") public void showImg(String instanceId, HttpServletResponse response) { /* * 参数校验 */ logger.info("查看完整流程图！流程实例ID:{}", instanceId); if(StringUtils.isBlank(instanceId)) return; <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">/* * 获取流程实例 */</span></span></span></span> HistoricProcessInstance processInstance = historyService.createHistoricProcessInstanceQuery().processInstanceId(instanceId).singleResult(); <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">if</span></span></span></span>(processInstance == <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">null</span></span></span></span>) { logger.error(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"流程实例ID:{}没查询到流程实例！"</span></span></span></span>, instanceId); <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">return</span></span></span></span>; } <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 根据流程对象获取流程对象模型</span></span></span></span> BpmnModel bpmnModel = repositoryService.getBpmnModel(processInstance.getProcessDefinitionId()); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">/* * 查看已执行的节点集合 * 获取流程历史中已执行节点，并按照节点在流程中执行先后顺序排序 */</span></span></span></span> <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 构造历史流程查询</span></span></span></span> HistoricActivityInstanceQuery historyInstanceQuery = historyService.createHistoricActivityInstanceQuery().processInstanceId(instanceId); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 查询历史节点</span></span></span></span> List<HistoricActivityInstance> historicActivityInstanceList = historyInstanceQuery.orderByHistoricActivityInstanceStartTime().asc().list(); <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">if</span></span></span></span>(historicActivityInstanceList == <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">null</span></span></span></span> || historicActivityInstanceList.size() == <span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number">0</span></span></span></span>) { logger.info(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"流程实例ID:{}没有历史节点信息！"</span></span></span></span>, instanceId); outputImg(response, bpmnModel, <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">null</span></span></span></span>, <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">null</span></span></span></span>); <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">return</span></span></span></span>; } <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 已执行的节点ID集合(将historicActivityInstanceList中元素的activityId字段取出封装到executedActivityIdList)</span></span></span></span> List<String> executedActivityIdList = historicActivityInstanceList.stream().map(item -> item.getActivityId()).collect(Collectors.toList()); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">/* * 获取流程走过的线 */</span></span></span></span> <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 获取流程定义</span></span></span></span> ProcessDefinitionEntity processDefinition = (ProcessDefinitionEntity) ((RepositoryServiceImpl) repositoryService).getDeployedProcessDefinition(processInstance.getProcessDefinitionId()); List<String> flowIds = ActivitiUtils.getHighLightedFlows(bpmnModel, processDefinition, historicActivityInstanceList); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">/* * 输出图像，并设置高亮 */</span></span></span></span> outputImg(response, bpmnModel, flowIds, executedActivityIdList);}<span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">/** * <p>输出图像</p> * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@param</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> response 响应实体 * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@param</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> bpmnModel 图像对象 * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@param</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> flowIds 已执行的线集合 * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@param</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> executedActivityIdList void 已执行的节点ID集合 * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@author</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> FRH * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@time</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> 2018年12月10日上午11:23:01 * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@version</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> 1.0 */</span></span></span></span><span class="hljs-function"><span class="hljs-keyword"><span class="hljs-function"><span class="hljs-keyword"><span class="hljs-function"><span class="hljs-keyword"><span class="hljs-function"><span class="hljs-keyword">private</span></span></span></span></span></span></span><span class="hljs-function"><span class="hljs-function"><span class="hljs-function"> </span></span></span><span class="hljs-keyword"><span class="hljs-function"><span class="hljs-keyword"><span class="hljs-function"><span class="hljs-keyword"><span class="hljs-function"><span class="hljs-keyword">void</span></span></span></span></span></span></span><span class="hljs-function"><span class="hljs-function"><span class="hljs-function"> </span></span></span><span class="hljs-title"><span class="hljs-function"><span class="hljs-title"><span class="hljs-function"><span class="hljs-title"><span class="hljs-function"><span class="hljs-title">outputImg</span></span></span></span></span></span></span><span class="hljs-params"><span class="hljs-function"><span class="hljs-params"><span class="hljs-function"><span class="hljs-params"><span class="hljs-function"><span class="hljs-params">(HttpServletResponse response, BpmnModel bpmnModel, List<String> flowIds, List<String> executedActivityIdList)</span></span></span></span></span></span></span><span class="hljs-function"><span class="hljs-function"><span class="hljs-function"> </span></span></span></span>{ InputStream imageStream = <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">null</span></span></span></span>; <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">try</span></span></span></span> { imageStream = processDiagramGenerator.generateDiagram(bpmnModel, executedActivityIdList, flowIds, <span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"宋体"</span></span></span></span>, <span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"微软雅黑"</span></span></span></span>, <span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"黑体"</span></span></span></span>, <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">true</span></span></span></span>, <span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"png"</span></span></span></span>); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 输出资源内容到相应对象</span></span></span></span> <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">byte</span></span></span></span>[] b = <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">new</span></span></span></span> <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">byte</span></span></span></span>[<span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number">1024</span></span></span></span>]; <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">int</span></span></span></span> len; <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">while</span></span></span></span> ((len = imageStream.read(b, <span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number">0</span></span></span></span>, <span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number">1024</span></span></span></span>)) != -<span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number">1</span></span></span></span>) { response.getOutputStream().write(b, <span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number">0</span></span></span></span>, len); } response.getOutputStream().flush(); }<span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">catch</span></span></span></span>(Exception e) { logger.error(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"流程图输出异常！"</span></span></span></span>, e); } <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">finally</span></span></span></span> { <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 流关闭</span></span></span></span> StreamUtils.closeInputStream(imageStream); }} <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">/* * 获取流程实例 */</span></span></span></span> HistoricProcessInstance processInstance = historyService.createHistoricProcessInstanceQuery().processInstanceId(instanceId).singleResult(); <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">if</span></span></span></span>(processInstance == <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">null</span></span></span></span>) { logger.error(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"流程实例ID:{}没查询到流程实例！"</span></span></span></span>, instanceId); <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">return</span></span></span></span>; } <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 根据流程对象获取流程对象模型</span></span></span></span> BpmnModel bpmnModel = repositoryService.getBpmnModel(processInstance.getProcessDefinitionId()); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">/* * 查看已执行的节点集合 * 获取流程历史中已执行节点，并按照节点在流程中执行先后顺序排序 */</span></span></span></span> <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 构造历史流程查询</span></span></span></span> HistoricActivityInstanceQuery historyInstanceQuery = historyService.createHistoricActivityInstanceQuery().processInstanceId(instanceId); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 查询历史节点</span></span></span></span> List<HistoricActivityInstance> historicActivityInstanceList = historyInstanceQuery.orderByHistoricActivityInstanceStartTime().asc().list(); <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">if</span></span></span></span>(historicActivityInstanceList == <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">null</span></span></span></span> || historicActivityInstanceList.size() == <span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number">0</span></span></span></span>) { logger.info(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"流程实例ID:{}没有历史节点信息！"</span></span></span></span>, instanceId); outputImg(response, bpmnModel, <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">null</span></span></span></span>, <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">null</span></span></span></span>); <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">return</span></span></span></span>; } <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 已执行的节点ID集合(将historicActivityInstanceList中元素的activityId字段取出封装到executedActivityIdList)</span></span></span></span> List<String> executedActivityIdList = historicActivityInstanceList.stream().map(item -> item.getActivityId()).collect(Collectors.toList()); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">/* * 获取流程走过的线 */</span></span></span></span> <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 获取流程定义</span></span></span></span> ProcessDefinitionEntity processDefinition = (ProcessDefinitionEntity) ((RepositoryServiceImpl) repositoryService).getDeployedProcessDefinition(processInstance.getProcessDefinitionId()); List<String> flowIds = ActivitiUtils.getHighLightedFlows(bpmnModel, processDefinition, historicActivityInstanceList); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">/* * 输出图像，并设置高亮 */</span></span></span></span> outputImg(response, bpmnModel, flowIds, executedActivityIdList);}<span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">/** * <p>输出图像</p> * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@param</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> response 响应实体 * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@param</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> bpmnModel 图像对象 * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@param</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> flowIds 已执行的线集合 * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@param</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> executedActivityIdList void 已执行的节点ID集合 * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@author</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> FRH * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@time</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> 2018年12月10日上午11:23:01 * </span></span></span><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag"><span class="hljs-comment"><span class="hljs-doctag">@version</span></span></span></span></span></span></span><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"> 1.0 */</span></span></span></span><span class="hljs-function"><span class="hljs-keyword"><span class="hljs-function"><span class="hljs-keyword"><span class="hljs-function"><span class="hljs-keyword"><span class="hljs-function"><span class="hljs-keyword">private</span></span></span></span></span></span></span><span class="hljs-function"><span class="hljs-function"><span class="hljs-function"> </span></span></span><span class="hljs-keyword"><span class="hljs-function"><span class="hljs-keyword"><span class="hljs-function"><span class="hljs-keyword"><span class="hljs-function"><span class="hljs-keyword">void</span></span></span></span></span></span></span><span class="hljs-function"><span class="hljs-function"><span class="hljs-function"> </span></span></span><span class="hljs-title"><span class="hljs-function"><span class="hljs-title"><span class="hljs-function"><span class="hljs-title"><span class="hljs-function"><span class="hljs-title">outputImg</span></span></span></span></span></span></span><span class="hljs-params"><span class="hljs-function"><span class="hljs-params"><span class="hljs-function"><span class="hljs-params"><span class="hljs-function"><span class="hljs-params">(HttpServletResponse response, BpmnModel bpmnModel, List<String> flowIds, List<String> executedActivityIdList)</span></span></span></span></span></span></span><span class="hljs-function"><span class="hljs-function"><span class="hljs-function"> </span></span></span></span>{ InputStream imageStream = <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">null</span></span></span></span>; <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">try</span></span></span></span> { imageStream = processDiagramGenerator.generateDiagram(bpmnModel, executedActivityIdList, flowIds, <span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"宋体"</span></span></span></span>, <span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"微软雅黑"</span></span></span></span>, <span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"黑体"</span></span></span></span>, <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">true</span></span></span></span>, <span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"png"</span></span></span></span>); <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 输出资源内容到相应对象</span></span></span></span> <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">byte</span></span></span></span>[] b = <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">new</span></span></span></span> <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">byte</span></span></span></span>[<span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number">1024</span></span></span></span>]; <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">int</span></span></span></span> len; <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">while</span></span></span></span> ((len = imageStream.read(b, <span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number">0</span></span></span></span>, <span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number">1024</span></span></span></span>)) != -<span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number">1</span></span></span></span>) { response.getOutputStream().write(b, <span class="hljs-number"><span class="hljs-number"><span class="hljs-number"><span class="hljs-number">0</span></span></span></span>, len); } response.getOutputStream().flush(); }<span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">catch</span></span></span></span>(Exception e) { logger.error(<span class="hljs-string"><span class="hljs-string"><span class="hljs-string"><span class="hljs-string">"流程图输出异常！"</span></span></span></span>, e); } <span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword"><span class="hljs-keyword">finally</span></span></span></span> { <span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment"><span class="hljs-comment">// 流关闭</span></span></span></span> StreamUtils.closeInputStream(imageStream); }}如果本文对你有帮助，别忘记给我个3连 ，点赞，转发，评论，
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