业务流程管理项目（BPM）

activiti，它是一种工作流引擎，可以提取业务系统中复杂的业务流程，并使用特殊的建模语言BPMN2.0定义业务流程按照预定义流程执行，实现系统流程activiti管理，减少业务系统因流程变化而升级的工作量，从而提高系统的健康度。

（1）所需jar包

1、activiti-engine-7.0.0.beta1.jar

2、activiti 依赖的 jar 包： mybatis、 alf4j、 log4j 等

3、activiti 依赖的 spring 包

4、mysql数据库驱动(数据库驱动可以根据自己的需要进行更多的变化，详细参考activiti支持的数据库)

5.第三方数据连接池 dbcp

6、单元测试 Junit-4.12.jar(用于测试activiti）

（2）pom.xml

<properties>     <slf4j.version>1.6.6</slf4j.version>     <log4j.version>1.2.12</log4j.version> <activiti.version>7.0.0.Beta1</activiti.version> </properties> <dependencies> <dependency> <groupId>org.activiti</groupId> <artifactId>activiti-engine</artifactId> <version>${ 
         activiti.version}</version> </dependency> <dependency> <groupId>org.activiti</groupId> <artifactId>activiti-spring</artifactId> <version>${ 
         activiti.version}</version> </dependency> <!-- bpmn 模型处理 --> <dependency> <groupId>org.activiti</groupId> <artifactId>activiti-bpmn-model</artifactId> <version>${ 
         activiti.version}</version> </dependency> <!-- bpmn 转换 --> <dependency> <groupId>org.activiti</groupId> <artifactId>activiti-bpmn-converter</artifactId> <version>${ 
         activiti.version}</version> </dependency> <!-- bpmn json数据转换 --> <dependency> <groupId>org.activiti</groupId> <artifactId>activiti-json-converter</artifactId> <version>${ 
         activiti.version}</version> </dependency> <!-- bpmn 布局 --> <dependency> <groupId>org.activiti</groupId> <artifactId>activiti-bpmn-layout</artifactId> <version>${ 
         activiti.version}</version> </dependency> <!-- activiti 云支持 --> <dependency> <groupId>org.activiti.cloud</groupId> <artifactId>activiti-cloud-services-api</artifactId> <version>${ 
         activiti.version}</version> </dependency> <!-- mysql驱动 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.40</version> </dependency> <!-- mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.5</version> </dependency> <!-- 链接池 --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <!-- log start --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${ 
         log4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${ 
         slf4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${ 
         slf4j.version}</version> </dependency> </dependencies> 

(3)在resources文件夹下创建日志配置文件以及activiti所需配置文件activiti.cfg.xml

<?xml version="1.0" encoding="UTF-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
						http://www.springframework.org/schema/contex http://www.springframework.org/schema/context/spring-context.xsd
						http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--dbcp连接池-->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/activiti?serverTimezone=GMT&amp;nullCatalogMeansCurrent=true"/>
        <property name="username" value="root"/>
        <property name="password" value="19980420"/>
        <property name="maxActive" value="3"/>
        <property name="maxIdle" value="1"/>
     </bean>

    <!--在默认方式下，bean的id固定为processEngineConfiguration-->
    <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">
<!--配置数据库连接池-->
        <property name="dataSource" ref="dataSource"/>
        <!--        配置数据库相关内容-->
<!--        <property name="jdbcDriver" value="com.mysql.cj.jdbc.Driver"/>-->
<!--        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/activiti?serverTimezone=GMT&amp;nullCatalogMeansCurrent=true"/>-->
<!--        <property name="jdbcUsername" value="root"/>-->
<!--        <property name="jdbcPassword" value="19980420"/>-->
<!--        activiti在创建数据库时的策略，为true时，若存在相应的表，则使用，若不存在则创建-->
        <property name="databaseSchemaUpdate" value="true"/>
    </bean>
</beans>

日志配置文件

# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE debug info warn error fatal
log4j.rootCategory=debug, CONSOLE, LOGFILE
# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE
# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ 
        ISO8601} %-6r[%15.15t] %-5p %30.30c %x - %m\n
# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=f:\act\activiti.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d{ 
        ISO8601} %-6r[%15.15t] %-5p %30.30c %x - %m\n

第一次运行这个代码时自动创建

public class TestCreate { 
        
// 使用activiti提供的默认方法来创建数据库
    @Test
    public void testCreateDbTable(){ 
        
//需要使用activiti的工具类ProcessEngines,使用方法getDefaultProcessEngine，
//getDefaultProcessEngine会默认读取从resources下的activiti.cfg.xml文件中
// 在创建processEngine时，就会创建数据库的表
        ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
        System.out.println(engine);
    }
    @Test
    public void test1() { 
        
        //使用下面这种方式生成表的条件
        //1.activiti配置文件名称必须为activiti.cfg.xml
        //2.activiti.cfg.xml中bean的id必须为"processEngineConfiguration"
        ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
        System.out.println(engine );
    }
    @Test
    public void test2() { 
        
        //1.创建ProcessEngineConfiguration对象
        ProcessEngineConfiguration configuration = ProcessEngineConfiguration.createProcessEngineConfigurationFromResource("activiti.cfg.xml");
        //2.创建ProcessEngine对象
        ProcessEngine processEngine = configuration.buildProcessEngine();
        System.out.println(processEngine);
    }

（1）默认方法

//1.activiti配置文件名称必须为activiti.cfg.xml
//2.activiti.cfg.xml中bean的id必须为"processEngineConfiguration"
ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
System.out.println(engine );

HistoryService historyService = processEngine.getHistoryService();
ManagementService managementService = processEngine.getManagementService();
RepositoryService repositoryService = processEngine.getRepositoryService();