activiti基础环境搭建创建数据库表及策略

时间：2022-07-02 22:54:42

博主使用为activiti5.22的版本。

1、创建maven工程。

2、在pom文件中引入所需要的包，如：activiti包、数据库包。

这是我引用的包：

<dependencies>

<dependency>

<groupId>org.activiti</groupId>

<artifactId>activiti-spring</artifactId>

<version>5.22.0</version>

</dependency>

<!-- <dependency>

<groupId>commons-dbcp</groupId>

<artifactId>commons-dbcp</artifactId>

<version>1.4</version>

</dependency> -->

<dependency>

<groupId>com.alibaba</groupId>

<artifactId>druid</artifactId>

<version>1.1.2</version>

</dependency>

<dependency>

<groupId>mysql</groupId>

<artifactId>mysql-connector-java</artifactId>

<version>5.1.34</version>

</dependency>

<dependency>

<groupId>org.activiti</groupId>

<artifactId>activiti-engine</artifactId>

<version>5.22.0</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-core</artifactId>

<version>4.3.8.RELEASE</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-test</artifactId>

<version>4.3.8.RELEASE</version>

</dependency>

<dependency>

<groupId>com.mchange</groupId>

<artifactId>c3p0</artifactId>

<version>0.9.5-pre10</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-context</artifactId>

<version>4.3.8.RELEASE</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-expression</artifactId>

<version>4.3.8.RELEASE</version>

</dependency>

<dependency>

<groupId>javax.servlet</groupId>

<artifactId>javax.servlet-api</artifactId>

<version>3.1.0</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-web</artifactId>

<version>4.1.8.RELEASE</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-jdbc</artifactId>

<version>4.1.5.RELEASE</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-tx</artifactId>

<version>4.1.4.RELEASE</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-webmvc</artifactId>

<version>4.1.8.RELEASE</version>

</dependency>

<dependency>

<groupId>com.googlecode.ehcache-spring-annotations</groupId>

<artifactId>ehcache-spring-annotations</artifactId>

<version>1.2.0</version>

</dependency>

<dependency>

<groupId>javax.annotation</groupId>

<artifactId>jsr250-api</artifactId>

<version>1.0</version>

</dependency>

<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-context-support</artifactId>

<version>4.1.5.RELEASE</version>

</dependency>

<dependency>

<groupId>javax.servlet</groupId>

<artifactId>servlet-api</artifactId>

<version>3.0-alpha-1</version>

</dependency>

<dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

<version>4.11</version>

<scope>test</scope>

</dependency>

<dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis</artifactId>

<version>3.4.1</version>

</dependency>

<dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis-spring</artifactId>

<version>1.2.2</version>

</dependency>

</dependencies>

引入pom文件完毕之后，在maven的resources下新建activiti.cfg.xml文件，配置数据源及引擎类。后期与spring框架结合使用，记得把此xml文件引入到spring中。

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">

<property name="url" value="jdbc:mysql://localhost:3306/activiti"></property>

<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>

<property name="username" value="root"></property>

<property name="password" value="root"></property>

</bean>

<bean id="processEngineConfiguration"

class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">

<property name="dataSource" ref="dataSource"></property>

</bean>

下面是流程引擎配置类的几种创建方式，

　　@Test

    public void createDataTable(){

        ProcessEngineConfiguration processEngineConfiguration = ProcessEngineConfiguration.createStandaloneProcessEngineConfiguration();

        processEngineConfiguration.setJdbcDriver("com.mysql.jdbc.Driver");

        processEngineConfiguration.setJdbcUrl("jdbc:mysql://localhost:3306/activiti");

        processEngineConfiguration.setJdbcUsername("root");

        processEngineConfiguration.setJdbcPassword("root");

        /**

         * true：如果不存在表就创建，存在就直接使用。（默认使用该策略，真实项目不推荐使用，如果目前使用较低版本，贸然引入了更高的版本后，

         * 上线之后，就会导致activiti数据库环境升级版本，可能造成线上部分表无法使用。顺便一提：activiti的版本只能向上升级，无法降级处理）

         * false：流程引擎启动的时候，不会创建表，如果不存在就报错，存在就直接使用。（建议使用）

         * create-drop：每次都是创建表，然后删除表，需要手动调用引擎类的close方法（更不建议使用）

         */

//        processEngineConfiguration.setDatabaseSchemaUpdate("true");

//        processEngineConfiguration.setDatabaseSchemaUpdate("false");

        processEngineConfiguration.setDatabaseSchemaUpdate("create-drop");

        ProcessEngine buildProcessEngine = processEngineConfiguration.buildProcessEngine();

//        buildProcessEngine.close();

        System.out.println(buildProcessEngine);

    }

/**

     * 配置文件的方式创建 (流方式一)

     */

    @Test

    public void createTabale1(){

        InputStream inputStream=App.class.getClassLoader().getResourceAsStream("activiti.cfg.xml");

        ProcessEngineConfiguration processEngineConfigurationFromInputStream = ProcessEngineConfiguration.

                createProcessEngineConfigurationFromInputStream(inputStream);

        ProcessEngine processEngine = processEngineConfigurationFromInputStream.buildProcessEngine();

        System.out.println(processEngine);

    }

    /**

     * 配置文件的方式创建 (流方式二)

     * 第一种方式是调用第二种方式的源码

     */

    @Test

    public void createTabale2(){

        InputStream inputStream=App.class.getClassLoader().getResourceAsStream("activiti.cfg.xml");

        ProcessEngineConfiguration processEngineConfigurationFromInputStream = ProcessEngineConfiguration.createProcessEngineConfigurationFromInputStream(inputStream, "processEngineConfiguration");

        ProcessEngine processEngine = processEngineConfigurationFromInputStream.buildProcessEngine();

        System.out.println(processEngine);

    }

    /**

     * 配置文件的方式创建 (资源方式一)

     * 第一种方式是调用第二种方式的源码

     */

    @Test

    public void createTabale3(){

        String resource="activiti.cfg.xml";

        ProcessEngineConfiguration processEngineConfigurationFromResource = ProcessEngineConfiguration.createProcessEngineConfigurationFromResource(resource);

        ProcessEngine buildProcessEngine = processEngineConfigurationFromResource.buildProcessEngine();

        System.out.println(buildProcessEngine);

    }

    /**

     * 配置文件的方式创建 (资源方式二)

     * 第一种方式是调用第二种方式的源码

     */

    @Test

    public void createTabale4(){

        String resource="activiti.cfg.xml";

        ProcessEngineConfiguration processEngineConfigurationFromResource = ProcessEngineConfiguration.createProcessEngineConfigurationFromResource(resource,"processEngineConfiguration");

        ProcessEngine buildProcessEngine = processEngineConfigurationFromResource.buildProcessEngine();

        System.out.println(buildProcessEngine);

    }

    /**

     * 默认的方式创建 (资源方式一)

     * 通过文件的位置：activiti.cfg.xml。此处我的文件位置是在resources下

     */

    @Test

    public void createTabale5(){

        ProcessEngineConfiguration processEngineConfigurationFromResource = ProcessEngineConfiguration.createProcessEngineConfigurationFromResourceDefault();

        ProcessEngine buildProcessEngine = processEngineConfigurationFromResource.buildProcessEngine();

        System.out.println(buildProcessEngine);

    }

运行后大家会发现数据库多了二十几张表，都是activiti自己的表结构，没错吧。后期与实际业务结合的时候，可根据需求再自定义表与之结合即可。

后续会补上aciviti的表结构详解，尽请期待！

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