工作流创建的三种方式

第一种。

package activitiDemo;import org.activiti.engine.ProcessEngine;import org.activiti.engine.ProcessEngineConfiguration;import org.junit.Test;public class demo {    @Test    public void test(){        ProcessEngineConfiguration processEngine = ProcessEngineConfiguration.createStandaloneProcessEngineConfiguration();//      数据库的一些配置        processEngine.setJdbcDriver("com.mysql.jdbc.Driver");        processEngine.setJdbcUrl("jdbc:mysql://localhost:3306/workflow");        processEngine.setJdbcUsername("root");        processEngine.setJdbcPassword("root");//      表示没有表自动给你创建表        processEngine.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);//      创建工作流引擎        ProcessEngine buildProcessEngine = processEngine.buildProcessEngine();        System.out.println(buildProcessEngine);    }}

第二种

@Test    public void test2(){        ProcessEngineConfiguration processEngine = ProcessEngineConfiguration.createProcessEngineConfigurationFromResource("activiti.cfg.xml");        ProcessEngine buildProcessEngine = processEngine.buildProcessEngine();        System.out.println(buildProcessEngine);    }

activiti.cfg.xml

<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.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">    <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">        <!-- 连接数据的配置 -->        <property name="jdbcDriver" value="com.mysql.jdbc.Driver"></property>        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/workflow?useUnicode=true&amp;characterEncoding=utf8"></property>        <property name="jdbcUsername" value="root"></property>        <property name="jdbcPassword" value="root"></property>        <!-- 没有表创建表 -->        <property name="databaseSchemaUpdate" value="true"></property>    </bean></beans>

log4j.propertites

log4j.rootLogger=INFO, CA# ConsoleAppenderlog4j.appender.CA=org.apache.log4j.ConsoleAppenderlog4j.appender.CA.layout=org.apache.log4j.PatternLayoutlog4j.appender.CA.layout.ConversionPattern= %d{hh:mm:ss,SSS} [%t] %-5p %c %x - %m%n

第三种

在前面看到了两种创建ProcessEngine（流程引擎）的方式，而这里要简化很多，调用ProcessEngines的getDefaultProceeEngine方法时会自动加载classpath下名为activiti.cfg.xml文件。

@Test    public void test3(){        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();        System.out.println(processEngine);    }

结果就是在数据库中自动给你创建23张表