10【掌握】流程变量

作用：
在流程进行的过程可以附带一些数据
控制流程的走向

1.启动流程时设置变量

/**
     * 启动流程设置流程变量
     */
    @Test
    public void startProcess() {
        //1,得到启动流程的service
        RuntimeService runtimeService = this.processEngine.getRuntimeService();
        String processDefinitionKey="HelloWorld";
        //ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(processDefinitionKey);//启动的永远是最新版本的流程
        Map<String,Object>  variables=new HashMap<>();
        variables.put("请假天数", 20);
        variables.put("请假时间", new Date());
        variables.put("请假原因", "回家相亲");
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(processDefinitionKey, variables);
        System.out.println("流程启动成功");
        System.out.println("部署ID:"+processInstance.getDeploymentId());//指act_re_deployment的id
        System.out.println("流程定义ID:"+processInstance.getProcessDefinitionId());//act_re_procdef里面的id
        System.out.println("流程实例ID:"+processInstance.getId());//act_ru_execution这个表里面的id
    }

2.使用执行实例ID时设置变量

@Test
    public void setVariable1() {
        //1,得到启动流程的service
        RuntimeService runtimeService = this.processEngine.getRuntimeService();
        String executionId="2505";
        //runtimeService.setVariable(executionId, "aaa", 111.00);
        Map<String,Object>  variables=new HashMap<>();
        variables.put("请假天数", 21);
        variables.put("请假时间", new Date());
        variables.put("请假原因", "回家相亲");
        runtimeService.setVariables(executionId, variables);
        System.out.println("流程变量设置成功");
    }

3.使用任务ID时设置变量

@Test
    public void setVariable2() {
        TaskService taskService = this.processEngine.getTaskService();
        String taskId="2508";
        taskService.setVariable(taskId, "bbb", 111.00);
        System.out.println("流程变量设置成功");
    }

4.完成功任务时设置变量

@Test
    public void setVariable3() {
        TaskService taskService = this.processEngine.getTaskService();
        String taskId="2508";
        Map<String,Object>  variables=new HashMap<>();
        variables.put("请假天数", 22);
        variables.put("请假时间", new Date());
        variables.put("请假原因", "回家相亲");
        taskService.complete(taskId, variables);
        System.out.println("任务完成成功");
    }

5.已知执行实例ID得到流程变量

/**
     * 得到流程变量
     */
    @Test
    public void getVariable1() {
        //1,得到启动流程的service
        RuntimeService runtimeService = this.processEngine.getRuntimeService();
        String executionId="2501";
        Object date = runtimeService.getVariable(executionId, "请假天数");
        System.out.println(date);
        }

6.查询历史流程变量

/**
     * 得到流程变量
     */
    @Test
    public void getVariable1() {
        HistoryService historyService = this.processEngine.getHistoryService();
        List<HistoricVariableInstance> list = historyService.createHistoricVariableInstanceQuery().executionId(executionId).list();
        for (HistoricVariableInstance hvi : list) {
            System.out.println("变量ID:"+hvi.getId());
            System.out.println("变量类型:"+hvi.getVariableTypeName());
            System.out.println("变量名称:"+hvi.getVariableName());
            System.out.println("变量值:"+hvi.getValue());
            System.out.println("#####################");
        }
    }

7.已知任务ID得到流程变量

/**
     * 得到流程变量
     */
    @Test
    public void getVariable2() {
        //1,得到启动流程的service
        TaskService taskService = this.processEngine.getTaskService();
        String taskId="10002";
        Object date = taskService.getVariable(taskId, "请假天数");
        System.out.println(date);
    }

8.流程变量的支持的类型

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serializable要加上序列化的id

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