Activiti获取ProcessEngine的三种方法

1.通过ProcessEngineConfiguration获取

 package cn.lonecloud.mavenActivi;

 import org.activiti.engine.ProcessEngine;
 import org.activiti.engine.ProcessEngineConfiguration;
 import org.junit.Test;
 /**
  * 通过使用ProcessEngineConfiguration获取
  * @Title: ConfigByClass.java
  * @Package cn.lonecloud.mavenActivi
  * @Description:
  * @author lonecloud
  * @date 2016年8月22日 下午10:50:33
  */
 public class ConfigByClass {
     @Test
     public void config() {
         //获取config对象
         ProcessEngineConfiguration processEngineConfiguration = ProcessEngineConfiguration
                 .createStandaloneProcessEngineConfiguration();
         //Jdbc设置
         String jdbcDriver = "com.mysql.jdbc.Driver";
         processEngineConfiguration.setJdbcDriver(jdbcDriver);
         String jdbcUrl = "jdbc:mysql://localhost:3306/mavenActiviti?useUnicode=true&characterEncoding=utf-8";
         processEngineConfiguration.setJdbcUrl(jdbcUrl);
         String jdbcUsername = "root";
         processEngineConfiguration.setJdbcUsername(jdbcUsername);
         String jdbcPassword = "123456";
         processEngineConfiguration.setJdbcPassword(jdbcPassword);
         /**
          * Checks the version of the DB schema against the library when the
          * process engine is being created and throws an exception if the
          * versions don't match.
          */
 //        public static final String DB_SCHEMA_UPDATE_FALSE = "false";//不自动创建新表

         /**
          * Creates the schema when the process engine is being created and drops
          * the schema when the process engine is being closed.
          */
 //        public static final String DB_SCHEMA_UPDATE_CREATE_DROP = "create-drop";//每次运行创建新表

         /**
          * Upon building of the process engine, a check is performed and an
          * update of the schema is performed if it is necessary.
          */
 //        public static final String DB_SCHEMA_UPDATE_TRUE = "true";设置自动对表结构进行改进和升级
         //设置是否自动更新
         processEngineConfiguration
                 .setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
         //获取引擎对象
         ProcessEngine processEngine = processEngineConfiguration.buildProcessEngine();
         processEngine.close();
     }
 }

2.通过ProcessEngineConfiguration载入xml文件

xml文件：

 <beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
     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
 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
     <!--这里的类太多别导错了 -->
     <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">
         <!-- 配置流程引擎配置对象 -->
         <property name="jdbcDriver" value="com.mysql.jdbc.Driver"></property>
         <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/activiti?useUnicode=true&amp;characterEncoding=utf-8"></property>
         <property name="jdbcUsername" value="root"></property>
         <property name="jdbcPassword" value="123456"></property>
         <!-- 注入数据源信息 -->
         <property name="databaseSchemaUpdate" value="true"></property>
     </bean>

     <bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean">
         <!-- 注入自动建表设置 -->
         <property name="processEngineConfiguration" ref="processEngineConfiguration"></property>
     </bean>
 </beans>

java

 package cn.lonecloud.mavenActivi;

 import org.activiti.engine.ProcessEngine;
 import org.activiti.engine.ProcessEngineConfiguration;
 import org.activiti.engine.ProcessEngines;
 import org.junit.Test;
 /**
  * 通过通过配置文件进行初始化获取引擎对
  * @Title: ConfigByConfig.java
  * @Package cn.lonecloud.mavenActivi
  * @Description:
  * @author lonecloud
  * @date 2016年8月22日 下午10:40:35
  */
 public class ConfigByConfig {
     /**
      * 通过配置文件进行初始化获取引擎对象
      * @Description:
      */
     @Test
     public void configByConf(){
         //载入资源
         ProcessEngineConfiguration processEngineConfiguration = ProcessEngineConfiguration.createProcessEngineConfigurationFromResource("activiti.cfg.xml");
         //创建引擎
         ProcessEngine processEngine = processEngineConfiguration.buildProcessEngine();
         processEngine.getRepositoryService();
     }
  }

3.通过默认载入activiti.cfg.xml进行获取

      * 通过默认载入activiti.cfg.xml进行获取
      * @Description:推荐使用
      */
     @Test
     public void configByDefault(){
         //通过获取载入默认获取
         ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
         processEngine.close();
     }

这里的xml文件名必须设置为activiti.cfg.xml