Activiti学习——Activiti与Spring集成

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发布于 2018-03-08 04:07:31

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代码可运行

与Spring集成

基础准备

目录结构

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();
    }
}