一、新增所需jar包

從官網上下載對應的版本，在裡面找到Activiti所需jar包，這裡我添加了Activiti提供的11個jar，分別為：

activiti-bpmn-converter-5.16.4.jar
activiti-bpmn-layout-5.16.4.jar
activiti-bpmn-model-5.16.4.jar
activiti-common-rest-5.16.4.jar
activiti-engine-5.16.4.jar
activiti-image-generator-5.16.4.jar
activiti-json-converter-5.16.4.jar
activiti-process
 
-validation-5.16.4.jar
activiti-rest-5.16.4.jar
activiti-simple-workflow-5.16.4.jar
activiti-spring-5.16.4.jar

同時也需要如下5個jar包，

mybatis-3.2.5.jar
slf4j-api-1.7.6.jar
slf4j-log4j12-1.7.6.jar
commons-lang3-3.3.2.jar
joda-time-2.1.jar

二、新增spring配置資訊

<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
 

    xmlns:util="http://www.springframework.org/schema/util"
    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.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
    ">
    <!-- 開啟註解掃描 -->
    <context:annotation-config />
    <!-- 自動註冊實體bean -->
    <context:component-scan base-package="com.cloud.wyscha">
        <context:exclude-filter type="annotation"
            expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

    <aop:aspectj-autoproxy proxy-target-class="true"/> 

    <context:property-placeholder location="classpath:conf/jdbc.properties,classpath:conf/config.properties" />

    <bean id="masterDS" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <property name="driverClassName" value="${jdbc_driver}" />
        <property name="url" value="${jdbc_url}" />
        <property name="username" value="${jdbc_username}" />
        <property name="password" value="${jdbc_password}" />
        <property name="initialSize" value="30" />
        <property name="maxActive" value="1000" />
        <property name="maxIdle" value="30" />
        <property name="maxWait" value="10000" />
        <property name="defaultAutoCommit" value="false" />
    </bean>

    <bean id="dataSource" class="com.cloud.common.db.datasource.DynamicDataSource">
        <property name="targetDataSources">
            <map key-type="java.lang.String">
                <entry key="masterDS" value-ref="masterDS" />
            </map>
        </property>
        <property name="defaultTargetDataSource" ref="masterDS" />
    </bean>

    <!-- mybatis檔案配置，掃描所有mapper檔案 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="configLocation" value="classpath:conf/mybatis-config.xml"></property>
    </bean>


    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.cloud.wyscha.*.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
    </bean>


    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    <!--基於註解的宣告式事務-->
    <tx:annotation-driven transaction-manager="transactionManager" />

    <!-- 使用宣告式事務 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="insert*" propagation="REQUIRED" />
            <tx:method name="add*" propagation="REQUIRED" />
            <tx:method name="update*" propagation="REQUIRED" />
            <tx:method name="delete*" propagation="REQUIRED" />
            <tx:method name="call*" propagation="REQUIRED" />
            <tx:method name="create*" propagation="REQUIRED" />

            <tx:method name="find*" propagation="SUPPORTS" read-only="true" />
            <tx:method name="query*" propagation="SUPPORTS" read-only="true" />
            <tx:method name="get*" propagation="SUPPORTS" read-only="true" />
            <tx:method name="select*" propagation="SUPPORTS" read-only="true" />
            <tx:method name="*" propagation="SUPPORTS" read-only="true" />
        </tx:attributes>
    </tx:advice>

    <bean id="dataSourceExchange" class="com.cloud.common.db.datasource.DataSourceExchange" />

    <aop:config>
        <aop:pointcut id="service1" expression="execution(* com.cloud.wyscha.*.service..*Service*.*(..))" />
        <aop:advisor advice-ref="dataSourceExchange" pointcut-ref="service1" order="1" />
        <aop:advisor advice-ref="txAdvice"  pointcut-ref="service1"  order="3" />
    </aop:config>

    <!--建立流程引擎物件-->
    <bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
        <property name="dataSource" ref="dataSource"/>
        <property name="transactionManager" ref="transactionManager"/>
        <property name="databaseSchemaUpdate" value="true"/>
        <property name="mailServerHost" value="localhost"/>
        <property name="mailServerPort" value="5025"/>
        <!-- 是否啟動jobExecutor -->
        <!-- <property name="jobExecutorActivate"value="false" /> -->
    </bean>

    <!--流程引擎配置-->
    <bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean">
        <property name="processEngineConfiguration" ref="processEngineConfiguration"/>
    </bean>

    <!-- 建立activiti提供的各種服務 -->
    <!-- 工作流倉儲服務 -->
    <bean id="repositoryService" factory-bean="processEngine" factory-method="getRepositoryService" />
    <!-- 工作流執行服務 -->
    <bean id="runtimeService" factory-bean="processEngine" factory-method="getRuntimeService" />
    <!-- 工作流任務服務-->
    <bean id="taskService" factory-bean="processEngine" factory-method="getTaskService" />
    <!-- 工作流歷史資料服務-->
    <bean id="historyService" factory-bean="processEngine" factory-method="getHistoryService" />
    <!-- 工作流管理服務-->
    <bean id="managementService" factory-bean="processEngine" factory-method="getManagementService" />
    <!-- 表彰-->
    <bean id="formService" factory-bean="processEngine" factory-method="getFormService" />
    <!-- 工作流唯一服務 -->
    <bean id="IdentityService" factory-bean="processEngine" factory-method="getIdentityService"/>
</beans>

三、建立activiti資料庫

從官網下載並解壓的檔案中找到database檔案下的各類資料庫指令碼，這裡用的是mysql資料庫，所以把其中mysql的指令碼拷貝出來，新建一個mysql資料庫，名為activiti，分別執行

activiti.mysql.create.engine.sql
activiti.mysql.create.identity.sql
activiti.mysql.create.history.sql

這三個sql指令碼，它們分別建立了12張、4張、8張表，共24張表格，請核對是否全部建立成功。
注：可能是因為mysql版本或者其它原因，建立datetime格式的欄位時不能有長度定義，所以需要把上述三個sql指令碼中的datetime(3)改為datetime，另外把activiti.mysql.create.engine.sql中的CURRENT_TIMESTAMP(3)改為CURRENT_TIMESTAMP

四、單元測試

public static void main(String[] args) {
        // 1.建立Activiti配置物件的例項
        ProcessEngineConfiguration configuration = ProcessEngineConfiguration
                .createStandaloneProcessEngineConfiguration();
        // 2.設定資料庫連線資訊

        // 設定資料庫地址
        configuration
                .setJdbcUrl("jdbc:mysql://localhost:3306/activiti?createDatabaseIfNotExist&useUnicode=true&characterEncoding=utf8");
        // 資料庫驅動
        configuration.setJdbcDriver("com.mysql.jdbc.Driver");
        // 使用者名稱
        configuration.setJdbcUsername("root");
        // 密碼
        configuration.setJdbcPassword("");

        // 設定資料庫建表策略
        /**
         * DB_SCHEMA_UPDATE_TRUE：如果不存在表就建立表，存在就直接使用
         * DB_SCHEMA_UPDATE_FALSE：如果不存在表就丟擲異常
         * DB_SCHEMA_UPDATE_CREATE_DROP：每次都先刪除表，再建立新的表
         */
        configuration.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);

        // 3.使用配置物件建立流程引擎例項（檢查資料庫連線等環境資訊是否正確）
        ProcessEngine processEngine = configuration.buildProcessEngine();

        System.out.println(processEngine);
    }

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