Activiti explorer.war示例工程使用过程图解

2020-03-09 10:09:54 投稿：yaominghui

这篇文章主要介绍了Activiti explorer.war示例工程使用过程图解,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

工作流主要解决的主要问题是：为了实现某个业务目标，利用计算机在多个参与者之间按某种预定规则自动传递文档、信息或者任务。

activiti官方提供了一个示例工程activiti-explorer.war,运行这个工程可以体验activiti的基本功能，了解工作流的基本使用。

本文中使用的是activiti-5.22.0的官方包,

一、搭建开发环境

要运行示例工程，需要安装jdk8和tomcat。其中jdk需要jdk8或以上,tomcat我使用的是tomcat8,使用tomcat7时启动会报如下错误:

严重: Exception sending context initialized event to listener instance of class org.activiti.explorer.servlet.WebConfigurer org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'demoDataConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: protected org.activiti.engine.IdentityService org.activiti.explorer.conf.DemoDataConfiguration.identityService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'identityService' defined in class path resource [org/activiti/explorer/conf/ActivitiEngineConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.activiti.engine.IdentityService]: Factory method 'identityService' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'processEngine' defined in class path resource [org/activiti/explorer/conf/ActivitiEngineConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.activiti.engine.ProcessEngine]: Factory method 'processEngine' threw exception; nested exception is java.lang.RuntimeException: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'processEngineFactoryBean': FactoryBean threw exception on object creation; nested exception is java.util.ServiceConfigurationError: org.activiti.engine.cfg.ProcessEngineConfigurator: org.activiti.management.jmx.JMXConfigurator not a subtype at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1202) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480) at org.activiti.explorer.servlet.WebConfigurer.contextInitialized(WebConfigurer.java:40) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5197) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5720) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:1018) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:994) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:662) at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1127) at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:2020) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) at java.base/java.lang.Thread.run(Thread.java:844)

不明白这个是什么原因造成的,但tomcat升级到8版本后可以正常启动.

二、运行示例工程

将 activiti-5.22.0 的官方包解压后复制其中的activiti-explorer.war到本地tomcat的webapps目录中，然后启动tomcat,浏览器中访问http://localhost:8080/activiti-explorer/,会出现如下的登录界面,可以使用默认的账户密码

kermit/kermit 进行登录

登录成功后，就可以在这个示例应用中体验activiti的基本功能。

三、示例工程功能演示

这个工程分为了四个功能模块：任务、流程、报表、管理

下面我按照一般的使用流程来讲解下这几个功能模块

1. 创建流程图

从工作流的定义,为了实现某个业务目标利用计算机在多个参与者之间按某种预定规则自动传递文档、信息或者任务。可以知道使用工作流前我们需要先定义一个规则，在这里的规则指的就是流程图。

进入流程管理模块,按如下菜单选则新建一个流程模型

流程-->流程设计工作区 -->新建模型

然后在新的页面中绘制一个简单的请假流程并保存。绘制流程图时注意要在用户任务的属性中分配assignment为当前的登录人kermit，这样才能在代办中看到新的任务。

如下是新建好的请假流程

这样流程图就创建好了。