Activiti学习——Activiti与Spring集成

与Spring集成

基础准备

目录结构

相关jar包

Activiti的相关jar包
Activiti依赖的相关jar包
Spring的相关jar包
Spring依赖的相关jar包
本示例相关jar包截图

配置文件设置

web.xml

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"    id="WebApp_ActivitiDemo2" version="2.5">    <display-name>ActivitiDemo2</display-name>    <!-- 监听： 在启动Web 容器时，自动装配Spring applicationContext.xml 的配置信息 -->    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <!-- 加载spring主配置文件 -->    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath:config/applicationContext.xml</param-value>    </context-param>    <!-- 配置spring拦截器 -->    <servlet>        <servlet-name>springMvc</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <init-param>            <param-name>contextConfigLocation</param-name>            <!-- 配置请求路径 -->            <param-value>classpath:config/spring-servlet.xml</param-value>        </init-param>        <load-on-startup>1</load-on-startup><!-- load-on-startup必须放在最后 -->    </servlet>    <servlet-mapping>        <servlet-name>springMvc</servlet-name>        <url-pattern>/</url-pattern>    </servlet-mapping>    <!-- 转换为UTF-8编码 -->    <filter>        <filter-name>itxxzEncoding</filter-name>        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>        <init-param>            <param-name>encoding</param-name>            <param-value>UTF-8</param-value>        </init-param>        <init-param>            <param-name>forceEncoding</param-name>            <param-value>true</param-value>        </init-param>    </filter>    <filter-mapping>        <filter-name>itxxzEncoding</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping></web-app>  

spring-servlet.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:mvc="http://www.springframework.org/schema/mvc"    xmlns:context="http://www.springframework.org/schema/context"    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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">    <!-- 启用spring mvc 注解 -->    <context:annotation-config />    <!-- 设置使用注解的类所在的jar包 controller扫描路径 -->    <context:component-scan base-package="com.pzr.demo2.web.controller"></context:component-scan>    <mvc:annotation-driven>        <!-- 消息转换器，配置字符集解决乱码问题 -->        <mvc:message-converters register-defaults="true">            <bean class="org.springframework.http.converter.StringHttpMessageConverter">                <property name="supportedMediaTypes" value="text/html;charset=UTF-8" />            </bean>        </mvc:message-converters>    </mvc:annotation-driven>    <!-- 使用jsp作为视图 -->    <bean id="viewResolver"        class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="viewClass"            value="org.springframework.web.servlet.view.JstlView" />        <property name="prefix" value="/WEB-INF/views/" />        <property name="suffix" value=".jsp"></property>    </bean></beans>

applicationContext.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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"    xsi:schemaLocation="            http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd            http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd            http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.0.xsd            http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd">    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"        destroy-method="close">        <property name="driverClassName" value="com.mysql.jdbc.Driver">        </property>        <property name="url">            <value>jdbc:mysql://localhost:3306/actdemo1?useUnicode=true&amp;characterEncoding=utf-8</value>        </property>        <property name="username" value="root">        </property>        <property name="password" value="">        </property>    </bean>    <!-- 配置事务 -->    <bean id="txManager"        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource" ref="dataSource"></property>    </bean>    <!--使用基于注解方式配置事务 -->    <tx:annotation-driven transaction-manager="txManager" />    <!-- activiti事务管理 -->    <bean id="transactionManager"        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource" ref="dataSource" />    </bean>    <!-- 加载activiti引擎 -->    <bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean">        <property name="processEngineConfiguration" ref="processEngineConfiguration" />    </bean>    <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="jobExecutorActivate" value="false" />    </bean>    <!-- activiti的各种服务接口 -->    <bean id="repositoryService" factory-bean="processEngine"        factory-method="getRepositoryService" />    <bean id="runtimeService" factory-bean="processEngine"        factory-method="getRuntimeService" />    <bean id="taskService" factory-bean="processEngine"        factory-method="getTaskService" />    <bean id="historyService" factory-bean="processEngine"        factory-method="getHistoryService" />    <bean id="managementService" factory-bean="processEngine"        factory-method="getManagementService" /></beans>  

示例代码

编写一个controller来调用接口

FirstController.java

package com.pzr.demo2.web.controller;import java.util.List;import org.activiti.engine.ProcessEngine;import org.activiti.engine.ProcessEngines;import org.activiti.engine.RepositoryService;import org.activiti.engine.RuntimeService;import org.activiti.engine.TaskService;import org.activiti.engine.task.Task;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;@Controller@RequestMapping(value = "/first")public class FirstController {    @RequestMapping(value = "/test1")    @ResponseBody    public String test(){        // 加载配置文件activiti.cfg.xml，创建引擎，如果出现null，可能原因        //1.加载路径不是根目录。        //2.依赖包不完全        // 获取配置文件后，引擎开始创建数据库。        ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();        // 获取流程储存服务组件        RepositoryService rs = engine.getRepositoryService();        // 获取运行时服务组件        RuntimeService rse = engine.getRuntimeService();        // 获取流程中的任务TASK组件        TaskService ts = engine.getTaskService();        // 部署流程，只要是符合BPMN2规范的XML文件，理论上都可以被ACTIVITI部署        rs.createDeployment().addClasspathResource("com/pzr/demo2/diagrams/MyProcess.bpmn").deploy();        // 开启流程，myprocess是流程的ID        rse.startProcessInstanceByKey("myProcess");        // 查询历史表中的Task        List<Task> task = ts.createTaskQuery().list();        Task task1 = task.get(task.size()-1);        System.out.println("第一环节："+task1);        System.out.println("推动流程到下一环节："+task1);        ts.complete(task1.getId());        task1 = ts.createTaskQuery().executionId(task1.getExecutionId()).singleResult();        System.out.println("第二环节：" + task1);        return "测试成功";    }    @Autowired    RepositoryService repositoryService;    @Autowired    RuntimeService runtimeService;    @Autowired    TaskService taskService;    @RequestMapping(value = "/test2")    @ResponseBody    public String test2(){        StringBuffer sb = new StringBuffer();        // 部署流程，只要是符合BPMN2规范的XML文件，理论上都可以被ACTIVITI部署        repositoryService.createDeployment().addClasspathResource("com/pzr/demo2/diagrams/MyProcess.bpmn").deploy();        // 开启流程，myprocess是流程的ID        runtimeService.startProcessInstanceByKey("myProcess");        // 查询历史表中的Task        List<Task> task = taskService.createTaskQuery().list();        Task task1 = task.get(task.size()-1);        sb.append("第一环节："+task1 +"<br/>");        sb.append("推动流程到下一环节："+task1+"<br/>");        taskService.complete(task1.getId());        task1 = taskService.createTaskQuery().executionId(task1.getExecutionId()).singleResult();        sb.append("第二环节：" + task1+"<br/>");        return sb.toString();    }}

其中test1()和test2()是作为对比的，test2()中接口全是用注入的方式使用的
把项目部署到tomcat中
启动项目，会自动建表
在浏览器运行http://localhost:8080/ActivitiDemo2/first/test2
结果如下图：

示例下载

点击下载

出现问题

Cannot create PoolableConnectionFactory (Unsupported character encoding ‘utf-8’.)

出现原因，将xml格式化化后，导致数据库配置部分出现换行
正常样子：

格式化后（错误）样子：

还原成正常样子即可解决问题