1.新建一个jbpm工程

2.在src目录下

新建一个helloworld包导入以下五个文件：helloworld.jpdl.xml

<?xml version="1.0" encoding="UTF-8"?>

<?xml version="1.0" encoding="UTF-8"?>

<process name="helloworld" xmlns="http://jbpm.org/4.4/jpdl">
   <start name="start1" g="66,16,48,48">
      <transition name="to 提交申请" to="提交申请" g="-71,-17"/>
   </start>
   <end name="end1" g="66,348,48,48"/>
   <task name="提交申请" g="44,96,92,52" assignee="员工">
      <transition name="to 部门经理审批" to="部门经理审批" g="-95,-17"/>
   </task>
   <task name="部门经理审批" g="44,180,92,52" assignee="部门经理">
      <transition name="to 总经理审批" to="总经理审批" g="-83,-17"/>
   </task>
   <task name="总经理审批" g="44,264,92,52" assignee="总经理">
      <transition name="to end1" to="end1" g="-47,-17"/>
   </task>
</process>

jbpm.cfg.xml

<?xml version="1.0" encoding="UTF-8"?>

<jbpm-configuration>

  <import resource="jbpm.default.cfg.xml" />
  <import resource="jbpm.businesscalendar.cfg.xml" />
  <import resource="jbpm.tx.hibernate.cfg.xml" />
  <import resource="jbpm.jpdl.cfg.xml" />
  <import resource="jbpm.bpmn.cfg.xml" />
  <import resource="jbpm.identity.cfg.xml" />

  <!-- Job executor is excluded for running the example test cases. -->
  <!-- To enable timers and messages in production use, this should be included. -->
  <!--
  <import resource="jbpm.jobexecutor.cfg.xml" />
  -->

</jbpm-configuration>

<?xml version="1.0" encoding="utf-8"?>

<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
  <session-factory>
  
     <property name="hibernate.dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
     <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
     <property name="hibernate.connection.url">jdbc:mysql:///jbpm</property>
     <property name="hibernate.connection.username">root</property>
     <property name="hibernate.connection.password">2012081006</property>
     <property name="hibernate.hbm2ddl.auto">update</property>
     <property name="hibernate.format_sql">true</property>
     
     <mapping resource="jbpm.repository.hbm.xml" />
     <mapping resource="jbpm.execution.hbm.xml" />
     <mapping resource="jbpm.history.hbm.xml" />
     <mapping resource="jbpm.task.hbm.xml" />
     <mapping resource="jbpm.identity.hbm.xml" />
     
  </session-factory>
</hibernate-configuration>

log4j.properties

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### direct messages to file hibernate.log ###
#log4j.appender.file=org.apache.log4j.FileAppender
#log4j.appender.file.File=hibernate.log
#log4j.appender.file.layout=org.apache.log4j.PatternLayout
#log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=error, stdout

#log4j.logger.org.hibernate=info
#log4j.logger.org.hibernate=debug

### log HQL query parser activity
#log4j.logger.org.hibernate.hql.ast.AST=debug

### log just the SQL
#log4j.logger.org.hibernate.SQL=debug

### log JDBC bind parameters ###
#log4j.logger.org.hibernate.type=info
#log4j.logger.org.hibernate.type=debug

### log schema export/update ###
#log4j.logger.org.hibernate.tool.hbm2ddl=debug

### log HQL parse trees
#log4j.logger.org.hibernate.hql=debug

### log cache activity ###
#log4j.logger.org.hibernate.cache=debug

### log transaction activity
#log4j.logger.org.hibernate.transaction=debug

### log JDBC resource acquisition
#log4j.logger.org.hibernate.jdbc=debug

### enable the following line if you want to track down connection ###
### leakages when using DriverManagerConnectionProvider ###
#log4j.logger.org.hibernate.connection.DriverManagerConnectionProvider=trace

2.搭建jbpm环境，即导入相应的jar包，在这里就不一一列举出来，如果你想要的话，请评论，并私聊我

3.新建一个包，如hellowordAPI

 并在此包下新建一个类，如下

package cn.itcast.oa_hellowordAPI;

import java.util.List;

import org.jbpm.api.Configuration;
import org.jbpm.api.ProcessEngine;
import org.jbpm.api.task.Task;
import org.junit.Test;



public class HelloWord_API {
   
	private static ProcessEngine processEngine=new Configuration().setResource("jbpm.cfg.xml").buildProcessEngine();
	//建表
	 @Test        //ddl.auto=update
	 public void createSchema() throws Exception{
		 new org.hibernate.cfg.Configuration()//
		 .configure("jbpm.hibernate.cfg.xml").buildSessionFactory();
	 }
	//部署流程定义
	@Test
	public void deployProcessDefinition() throws Exception {
	processEngine.getRepositoryService().createDeployment()//
	.addResourceFromClasspath("helloword/helloworld.jpdl.xml").addResourceFromClasspath("helloword/helloworld.png").deploy();
	}
	
	//启动流程实例
    @Test
   public void startProcessInstance() throws Exception {
			processEngine.getExecutionService().startProcessInstanceByKey("helloworld");
   }
		
   //查询我的个人任务列表
	@Test
	public void findMyPersonalTaskList() throws Exception {
			String userId1="员工";
		//String userId2="部门经理";
		//	String userId3="总经理";
			
			System.out.println("---------"+userId1+"--------");
			
		List<Task> tasks=processEngine.getTaskService().findPersonalTasks(userId1);
		for(Task task:tasks){
		System.out.println(task.getId()+"---"+task.getName()+"-----"+task.getAssignee());
		}
		
			
	}
		
	//办理任务
	@Test
	public void compeleteTask() throws Exception {
			String userId="10009";
			processEngine.getTaskService().completeTask(userId);
	}
}

jbpm API的helloword实例