java工作流activity_activity 工作流学习(一)

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启动流程实例

什么是流程实例？根据一个流程定义具体的一次执行过程就是一个流程实例,一个流程定义对应多个流程实例(一对多关系)

为了演示：在流程图中指定办理人是谁，现在是写死的，表示只能张三能提交请假申请。后面会讲解如何动态指定。

//根据流程定义的Id启动一个流程实例(操作ACT_RU_EXECUTION、ACT_RU_TASK、ACT_HI_PROCINST、ACT_HI_ACTINST、ACT_HI_TASKINST、ACT_RU_IDENTITYLINK、ACT_HI_IDENTITYLINK表)

@Test

public void test6() {

ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();

String processDefinitionId=”qjlc:1:104″;

ProcessInstance processInstance = processEngine.getRuntimeService().startProcessInstanceById(processDefinitionId);

System.out.print(processInstance.getId());//201

}

查询个人任务列表

@Test

public void test7() {

ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();

TaskQuery query = processEngine.getTaskService().createTaskQuery();

query.taskAssignee(“张三”);

List list = query.list();

for (Task item : list) {

System.out.print(item.getId()+”===”+item.getName());//204===提交请假申请

}

}

办理任务

//办理任务(主要操作ACT_RU_EXECUTION、ACT_RU_TASK表)

@Test

public void test8() {

ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();

processEngine.getTaskService().complete(“204”);

}

办理任务后，流程就走到了下一个节点，再次查询张三个人任务列表就查不到了，此时用李四去查就可以了。

使用Activiti框架的API操作流程

/**

* 使用Activiti框架的API操作流程

*/

public class ActivitiAPITest {

ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();

/**

* 部署流程定义 方式一：读取单个的流程定义文件 方式二：读取zip压缩文件

*/

@Test

public void test1() {

DeploymentBuilder deploymentBuilder = processEngine.getRepositoryService().createDeployment();

// 方式一：读取单个的流程定义文件

deploymentBuilder.addClasspathResource(“test1.bpmn”);

deploymentBuilder.addClasspathResource(“test1.png”);

Deployment deployment = deploymentBuilder.deploy();

// 方式二：读取zip压缩文件

/*ZipInputStream zipInputStream = new ZipInputStream(this.getClass().getClassLoader().getResourceAsStream(“process.zip”));

deploymentBuilder.addZipInputStream(zipInputStream);

deploymentBuilder.name(“请假流程部署”);

Deployment deployment = deploymentBuilder.deploy();*/

}

/**

* 查询部署列表

*/

@Test

public void test2() {

// 部署查询对象，查询表act_re_deployment

DeploymentQuery query = processEngine.getRepositoryService().createDeploymentQuery();

List list = query.list();

for (Deployment deployment : list) {

String id = deployment.getId();

System.out.println(id);

}

}

/**

* 查询流程定义列表

*/

@Test

public void test3() {

// 流程定义查询对象，查询表act_re_procdef

ProcessDefinitionQuery query = processEngine.getRepositoryService().createProcessDefinitionQuery();

List list = query.list();

for (ProcessDefinition pd : list) {

System.out.println(pd.getName() + “” + pd.getId());

}

}

/**

* 删除部署信息

*/

@Test

public void test4() {

String deploymentId = “1001”;

// processEngine.getRepositoryService().deleteDeployment(deploymentId);

processEngine.getRepositoryService().deleteDeployment(deploymentId,true);

}

/**

* 删除流程定义(通过删除部署信息达到删除流程定义的目的)

*/

@Test

public void test5() {

String deploymentId = “1401”;

// processEngine.getRepositoryService().deleteDeployment(deploymentId);

processEngine.getRepositoryService().deleteDeployment(deploymentId,

true);

}

/**

* 查询一次部署对应的流程定义文件名称和对应的输入流(bpmn png)

*

* @throws Exception

*/

@Test

public void test6() throws Exception {

String deploymentId = “101”;

List names = processEngine.getRepositoryService()

.getDeploymentResourceNames(deploymentId);

for (String name : names) {

System.out.println(name);

InputStream in = processEngine.getRepositoryService()

.getResourceAsStream(deploymentId, name);

// 将文件保存到本地磁盘

/*

* OutputStream out = new FileOutputStream(new File(“d:\\” + name));

* byte[] b = new byte[1024]; int len = 0; while((len =

* in.read(b))!=-1) { out.write(b, 0, len); } out.close();

*/

FileUtils.copyInputStreamToFile(in, new File(“d:\\” + name));

in.close();

}

}

/**

* 获得png文件的输入流

*

* @throws Exception

*/

@Test

public void test7() throws Exception {

String processDefinitionId = “qjlc:9:1204”;

InputStream pngInputStream = processEngine.getRepositoryService()

.getProcessDiagram(processDefinitionId);

FileUtils.copyInputStreamToFile(pngInputStream, new File(“d:\\my.png”));

}

/**

* 启动流程实例 方式一：根据流程定义的id启动 方式二：根据流程定义的key启动(自动选择最新版本的流程定义启动流程实例)

*/

@Test

public void test8() {

/*

* String processDefinitionId = “qjlc:9:1204”; ProcessInstance

* processInstance =

* processEngine.getRuntimeService().startProcessInstanceById

* (processDefinitionId ); System.out.println(processInstance.getId());

*/

String processDefinitionKey = “qjlc”;

ProcessInstance processInstance = processEngine.getRuntimeService()

.startProcessInstanceByKey(processDefinitionKey);

System.out.println(processInstance.getId());

}

/**

* 查询流程实例列表,查询act_ru_execution表

*/

@Test

public void test9(){

//流程实例查询对象，查询act_ru_execution表

ProcessInstanceQuery query = processEngine.getRuntimeService().createProcessInstanceQuery();

query.processDefinitionKey(“qjlc”);

query.orderByProcessInstanceId().desc();

query.listPage(0, 2);

List list = query.list();

for (ProcessInstance pi : list) {

System.out.println(pi.getId() + ” ” + pi.getActivityId());

}

}

/**

* 结束流程实例,操作的表act_ru_execution act_ru_task

*/

@Test

public void test10(){

String processInstanceId = “1601”;

processEngine.getRuntimeService().deleteProcessInstance(processInstanceId , “我愿意”);

}

/**

* 查询任务列表

*/

@Test

public void test11(){

//任务查询对象,查询act_ru_task表

TaskQuery query = processEngine.getTaskService().createTaskQuery();

String assignee = “李四”;

query.taskAssignee(assignee);

query.orderByTaskCreateTime().desc();

List list = query.list();

for (Task task : list) {

System.out.println(task.getId());

}

}

/**

* 办理任务

*/

@Test

public void test12(){

String taskId = “2902”;

processEngine.getTaskService().complete(taskId);

}

/**

* 直接将流程向下执行一步

*/

@Test

public void test13(){

String executionId = “2701”;//流程实例id

processEngine.getRuntimeService().signal(executionId);

}

/**

* 查询最新版本的流程定义列表

*/

@Test

public void test14(){

ProcessDefinitionQuery query = processEngine.getRepositoryService().createProcessDefinitionQuery();

query.orderByProcessDefinitionVersion().asc();

List list = query.list();

Map map = new HashMap();

for (ProcessDefinition pd : list) {

map.put(pd.getKey(), pd);

}

ArrayList lastList = new ArrayList<>(map.values());

for (ProcessDefinition processDefinition : lastList) {

System.out.println(processDefinition.getName() + ” “+ processDefinition.getVersion() );

}

}

}

Activiti框架提供的Service对象

RepositoryService—-操作静态的资源(流程定义，bpmn、png)

RuntimeService—–操作流程实例(启动流程实例、查询流程实例、结束流程实例)

TaskService—–操作任务(查询任务、办理任务)

HistoryService—-操作历史数据

Activiti框架提供的对象(和表有对应关系)

Deployment—–act_re_deployment

ProcessDefinition—-act_re_procdef

ProcessInstance—–act_ru_execution

Task—–act_ru_task

使用网页版流程设计器

1、将activiti-explorer.war复制到tomcat中

2、启动tomcat，访问http://lcoalhost:8080/activiti-explorer

3、使用kermit/kermit登录

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