Activiti学习——Activiti与Spring集成

淩亂°似流年 2022-07-21 00:30 183阅读 0赞

# 与Spring集成 #

## 基础准备 ##

### 目录结构 ###

![0CfoqXp.png][]

### 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  
![FPpXrFY.png][]  
![C0cLW1R.png][]

## 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>
    
        
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
        
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:config/applicationContext.xml</param-value>
        </context-param>
        
        <servlet>
            <servlet-name>springMvc</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <init-param>
                <param-name>contextConfigLocation</param-name>
                
                <param-value>classpath:config/spring-servlet.xml</param-value>
            </init-param>
            <load-on-startup>1</load-on-startup>
        </servlet>
        <servlet-mapping>
            <servlet-name>springMvc</servlet-name>
            <url-pattern>/</url-pattern>
        </servlet-mapping>
        
        <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 ###

### 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&characterEncoding=utf-8</value>
            </property>
            <property name="username" value="root">
            </property>
            <property name="password" value="">
            </property>
        </bean>
    
        
        <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"></property>
        </bean>
    
        
        <tx:annotation-driven transaction-manager="txManager" />
    
        
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource" />
        </bean>
    
        
        <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>
    
        
        <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][http_localhost_8080_ActivitiDemo2_first_test2]  
结果如下图：  
![sKeow7G.png][]

## 示例下载 ##

[点击下载 ][Link 1]

## 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：  
![QXiShq2.png][]  
格式化后（错误）样子：  
![YQMBXcy.png][]  
还原成正常样子即可解决问题

[0CfoqXp.png]: http://i.imgur.com/0CfoqXp.png
[FPpXrFY.png]: http://i.imgur.com/FPpXrFY.png
[C0cLW1R.png]: http://i.imgur.com/C0cLW1R.png
[http_localhost_8080_ActivitiDemo2_first_test2]: http://localhost:8080/ActivitiDemo2/first/test2
[sKeow7G.png]: http://i.imgur.com/sKeow7G.png
[Link 1]: http://pan.baidu.com/s/1o8D3H5S
[QXiShq2.png]: http://i.imgur.com/QXiShq2.png
[YQMBXcy.png]: http://i.imgur.com/YQMBXcy.png