Activiti学习记录

Posted 2020-12-03 fanjava

1.初始化数据库

使用工作流引擎创建23张表

public class TestActiviti {
    /**
     * 使用代码创建工作流需要的23张表
     */
    @Test
    public void createTable() {
        ProcessEngineConfiguration createStandaloneProcessEngineConfiguration = ProcessEngineConfiguration.createStandaloneProcessEngineConfiguration();
        createStandaloneProcessEngineConfiguration.setJdbcDriver("com.mysql.jdbc.Driver");
        createStandaloneProcessEngineConfiguration.setJdbcUrl("jdbc:mysql://localhost:3306/activiti0710?useUnicode=true&characterEncoding=utf8");
        createStandaloneProcessEngineConfiguration.setJdbcUsername("root");
        
        /** 
          public static final String DB_SCHEMA_UPDATE_FALSE = "false"; 不能自动创建表，需要表存在
          public static final String DB_SCHEMA_UPDATE_CREATE_DROP = "create-drop"; 表示先删除表，在创建表
          public static final String DB_SCHEMA_UPDATE_TRUE = "true";如果表不存在，自动创建表
          */
        createStandaloneProcessEngineConfiguration.setDatabaseSchemaUpdate(createStandaloneProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
        //工作流的核心对象
        ProcessEngine buildProcessEngine = createStandaloneProcessEngineConfiguration.buildProcessEngine();
        System.out.println(buildProcessEngine);
        
    }
}

在Activiti中，在创建核心的流程引擎对象时会自动建表。如果程序正常执行，mysql会自动建库，然后创建23张表。

 

2.添加并制定配置文件

在Actiiti5中定制流程必定会操作到数据库，如果都像上面那样写一大段代码会非常麻烦，所以我们可以把数据库连接配置写入配置文件。

创建activiti.cfg.xml文件，配置

 

<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">

    <!-- 
    ProcessEngineConfiguration createStandaloneProcessEngineConfiguration = ProcessEngineConfiguration.createStandaloneProcessEngineConfiguration();
        createStandaloneProcessEngineConfiguration.setJdbcDriver("com.mysql.jdbc.Driver");
        createStandaloneProcessEngineConfiguration.setJdbcUrl("jdbc:mysql://localhost:3306/activiti0710?useUnicode=true&characterEncoding=utf8");
        createStandaloneProcessEngineConfiguration.setJdbcUsername("root");
        
        /** 
          public static final String DB_SCHEMA_UPDATE_FALSE = "false"; 不能自动创建表，需要表存在
          public static final String DB_SCHEMA_UPDATE_CREATE_DROP = "create-drop"; 表示先删除表，在创建表
          public static final String DB_SCHEMA_UPDATE_TRUE = "true";如果表不存在，自动创建表
          */
        createStandaloneProcessEngineConfiguration.setDatabaseSchemaUpdate(createStandaloneProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
        //工作流的核心对象
        ProcessEngine buildProcessEngine = createStandaloneProcessEngineConfiguration.buildProcessEngine();
        
     -->
    <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneInMemProcessEngineConfiguration">
        <!-- 连接数据库配置 -->
        <property name="jdbcDriver" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/activiti0710?useUnicode=true&amp;characterEncoding=utf8"></property>
        <property name="jdbcUsername" value="root"></property>
        <!-- 没有表创建表 -->
        <property name="databaseSchemaUpdate" value="true"></property>
    </bean>

</beans>

 

java代码:

/**
     * 使用配置文件创建工作流需要的23张表
     */
    @Test
    public void createTable_2() {
        ProcessEngineConfiguration createProcessEngineConfigurationFromResource = ProcessEngineConfiguration.createProcessEngineConfigurationFromResource("activiti.cfg.xml");
        ProcessEngine buildProcessEngine = createProcessEngineConfigurationFromResource.buildProcessEngine();
        System.out.println(buildProcessEngine);
    }