动态创建工作流

import java.io.File;import java.io.IOException;import java.io.InputStream;import java.util.ArrayList;import java.util.List;import org.activiti.bpmn.BpmnAutoLayout;import org.activiti.bpmn.model.BpmnModel;import org.activiti.bpmn.model.EndEvent;import org.activiti.bpmn.model.ExclusiveGateway;import org.activiti.bpmn.model.Process;import org.activiti.bpmn.model.SequenceFlow;import org.activiti.bpmn.model.StartEvent;import org.activiti.bpmn.model.UserTask;import org.activiti.engine.ProcessEngine;import org.activiti.engine.ProcessEngineConfiguration;import org.activiti.engine.repository.Deployment;import org.activiti.engine.runtime.ProcessInstance;import org.activiti.engine.task.Task;import org.apache.commons.io.FileUtils;import org.apache.commons.lang.StringUtils;import org.junit.Assert;/** *  *//**   * @ClassName: ActivitiTest01 * @Description: TODO(activiti 工作流程图自动生成) * @author liang * @date 2016年4月20日 上午8:32:56 * */public class ActivitiTest01 {    public static void main(String[] args) {        try {            test01();        } catch (IOException e) {            e.printStackTrace();        }    }    public static void test01() throws IOException {        System.out.println(".........start...");        ProcessEngine processEngine=getProcessEngine();        // 1. Build up the model from scratch        BpmnModel model = new BpmnModel();          Process process=new Process();        model.addProcess(process);         final String PROCESSID ="process01";        final String PROCESSNAME ="测试01";        process.setId(PROCESSID);         process.setName(PROCESSNAME);        process.addFlowElement(createStartEvent());          process.addFlowElement(createUserTask("task1", "节点01", "candidateGroup1"));         process.addFlowElement(createExclusiveGateway("createExclusiveGateway1"));         process.addFlowElement(createUserTask("task2", "节点02", "candidateGroup2"));         process.addFlowElement(createExclusiveGateway("createExclusiveGateway2"));         process.addFlowElement(createUserTask("task3", "节点03", "candidateGroup3"));         process.addFlowElement(createExclusiveGateway("createExclusiveGateway3"));         process.addFlowElement(createUserTask("task4", "节点04", "candidateGroup4"));        process.addFlowElement(createEndEvent());          process.addFlowElement(createSequenceFlow("startEvent", "task1", "", ""));         process.addFlowElement(createSequenceFlow("task1", "task2", "", ""));         process.addFlowElement(createSequenceFlow("task2", "createExclusiveGateway1", "", ""));        process.addFlowElement(createSequenceFlow("createExclusiveGateway1", "task1", "不通过", "${pass=='2'}"));        process.addFlowElement(createSequenceFlow("createExclusiveGateway1", "task3", "通过", "${pass=='1'}"));         process.addFlowElement(createSequenceFlow("task3", "createExclusiveGateway2", "", ""));        process.addFlowElement(createSequenceFlow("createExclusiveGateway2", "task2", "不通过", "${pass=='2'}"));        process.addFlowElement(createSequenceFlow("createExclusiveGateway2", "task4", "通过", "${pass=='1'}"));        process.addFlowElement(createSequenceFlow("task4", "createExclusiveGateway3", "", ""));        process.addFlowElement(createSequenceFlow("createExclusiveGateway3", "task3", "不通过", "${pass=='2'}"));        process.addFlowElement(createSequenceFlow("createExclusiveGateway3", "endEvent", "通过", "${pass=='1'}"));        // 2. Generate graphical information          new BpmnAutoLayout(model).execute();        // 3. Deploy the process to the engine          Deployment deployment = processEngine.getRepositoryService().createDeployment().addBpmnModel(PROCESSID+".bpmn", model).name(PROCESSID+"_deployment").deploy();          // 4. Start a process instance          ProcessInstance processInstance = processEngine.getRuntimeService().startProcessInstanceByKey(PROCESSID);         // 5. Check if task is available          List<Task> tasks = processEngine.getTaskService().createTaskQuery().processInstanceId(processInstance.getId()).list();        Assert.assertEquals(1, tasks.size());               // 6. Save process diagram to a file            InputStream processDiagram = processEngine.getRepositoryService().getProcessDiagram(processInstance.getProcessDefinitionId());          FileUtils.copyInputStreamToFile(processDiagram, new File("/deployments/"+PROCESSID+".png"));          // 7. Save resulting BPMN xml to a file          InputStream processBpmn = processEngine.getRepositoryService().getResourceAsStream(deployment.getId(), PROCESSID+".bpmn");          FileUtils.copyInputStreamToFile(processBpmn,new File("/deployments/"+PROCESSID+".bpmn"));        System.out.println(".........end...");    }    protected static ProcessEngine getProcessEngine(){        ProcessEngine processEngine=ProcessEngineConfiguration.createStandaloneInMemProcessEngineConfiguration()                .setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_FALSE)                .setJdbcUrl("jdbc:mysql://127.0.0.1:3306/activitiDB")                .setJdbcDriver("com.mysql.jdbc.Driver")                .setJdbcUsername("root")                .setJdbcPassword("123456")                .setDatabaseSchemaUpdate("true")                .setJobExecutorActivate(false)                .buildProcessEngine();        return processEngine;    }    /*任务节点*/    protected static UserTask createUserTask(String id, String name, String candidateGroup) {        List<String> candidateGroups=new ArrayList<String>();        candidateGroups.add(candidateGroup);        UserTask userTask = new UserTask();        userTask.setName(name);        userTask.setId(id);        userTask.setCandidateGroups(candidateGroups);        return userTask;    }    /*连线*/    protected static SequenceFlow createSequenceFlow(String from, String to,String name,String conditionExpression) {        SequenceFlow flow = new SequenceFlow();        flow.setSourceRef(from);        flow.setTargetRef(to);        flow.setName(name);        if(StringUtils.isNotEmpty(conditionExpression)){            flow.setConditionExpression(conditionExpression);        }               return flow;    }    /*排他网关*/    protected static ExclusiveGateway createExclusiveGateway(String id) {        ExclusiveGateway exclusiveGateway = new ExclusiveGateway();        exclusiveGateway.setId(id);        return exclusiveGateway;    }    /*开始节点*/    protected static StartEvent createStartEvent() {        StartEvent startEvent = new StartEvent();        startEvent.setId("startEvent");        return startEvent;    }    /*结束节点*/    protected static EndEvent createEndEvent() {        EndEvent endEvent = new EndEvent();        endEvent.setId("endEvent");        return endEvent;    }}