经典的请假样例：

流程例如以下，首先须要部门经理审批。假设请假天数大于2天，则须要总经理审批，否则HR审批就可以

一：创建maven项目，项目结构例如以下：

增加依赖

pom.xml

     	
      
       org.activiti
      	
      
       activiti-engine
      	
      
       5.17.0
      
     
     	
      
       org.activiti
      	
      
       activiti-bpmn-layout
      	
      
       5.17.0
      
     
     	
      
       org.postgresql
      	
      
       postgresql
      	
      
       9.3-1103-jdbc41
      
     
     	
      
       org.slf4j
      	
      
       slf4j-log4j12
      	
      
       1.7.12
      
     

activiti.cfg.xml 

数据库使用postgresql

xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration"> <property name="databaseSchemaUpdate" value="drop-create"/> <property name="jdbcUrl" value="jdbc:postgresql://127.0.0.1/db_cloud"/> <property name="jdbcDriver" value="org.postgresql.Driver"/> <property name="jdbcUsername" value="admin"/> <property name="jdbcPassword" value="root"/> <property name="jobExecutorActivate" value="true"/> </bean> </beans>

流程文件leave.bpmn20.xml

     
     	
      		
       				
       		
       		
       		
       		
       			
        = 3}]]>
        		
       		
       		
       			
        
        		
       		
       				
       	
      
     

流程图例如以下：

二：代码演示

Leave.java

package com.lala.activiti;import java.util.HashMap;import java.util.List;import java.util.Map;import org.activiti.engine.ProcessEngine;import org.activiti.engine.ProcessEngineConfiguration;import org.activiti.engine.RepositoryService;import org.activiti.engine.RuntimeService;import org.activiti.engine.TaskService;import org.activiti.engine.task.Task;import org.activiti.engine.task.TaskQuery;public class Leave{	static void log(Object obj)    {    	System.out.println(obj);    }		static void run(ProcessEngine processEngine) throws Exception	{		RepositoryService repositoryService = processEngine.getRepositoryService();		        repositoryService.createDeployment().addClasspathResource("leave.bpmn20.xml").deploy();                RuntimeService runtimeService = processEngine.getRuntimeService();                Map
     
       variables = new HashMap<>();        variables.put("userid", "10010");        variables.put("day", 3);                runtimeService.startProcessInstanceByKey("leave_process", variables);                TaskService taskService = processEngine.getTaskService();                TaskQuery query = taskService.createTaskQuery();                List
      
        tasks = query.list();        for(Task task : tasks)        {        	log(task.getId() + "," + task.getName());        	taskService.complete(task.getId(), variables);        }                log("--------------------");                tasks = query.list();        for(Task task : tasks)        {        	log(task.getId() + "," + task.getName());        	taskService.complete(task.getId(), variables);        }                log("--------------------");                tasks = query.list();        for(Task task : tasks)        {        	log(task.getId() + "," + task.getName());        	taskService.complete(task.getId(), variables);        }	}	public static void main(String[] args)	{		ProcessEngine processEngine = ProcessEngineConfiguration.createProcessEngineConfigurationFromResource("activiti.cfg.xml").buildProcessEngine();			try {			run(processEngine);		} catch (Exception e) {			e.printStackTrace();		}				processEngine.close();	}}
      
     

当

variables.put("day", 3);

大于等于3的时候，输出

9,部门经理审批

--------------------

11,总经理审批

--------------------

13,HR审批

否则，输出

9,部门经理审批

--------------------

11,HR审批