Java Activiti(6)--流程变量的添加与获取(表act_ru_variable)

1、说明：

流程变量在整个工作流中扮演很重要的作用。例如：请假流程中有请假天数、请假原因等一些参数都为流程变量的范围。流程变量的作用域范围是流程实例。也就是说各个流程实例的流程变量是不相互影响的。流程实例结束完成以后流程变量还保存在数据库中。

2、流程变量示例：

3、添加流程变量

1）在启动流程实例时

//2、在启动流程实例时,添加变量    @Test    public void startProcessInstanceByKey() throws Exception {        String processDefinitionKey = "baoxiaoFlow";        Map<String, Object> variable = new HashMap<String, Object>();        variable.put("amount", "300元");        variable.put("reason", "出差");        ProcessInstance processInstance = processEngine.getRuntimeService().startProcessInstanceByKey(processDefinitionKey, variable);        System.out.println("processInstance.getId()===" + processInstance.getId());        System.out.println("processInstance.getProcessDefinitionId()===" + processInstance.getProcessDefinitionId());    }

2）在办理任务时

    //2.2、在办理任务时,添加变量    @Test    public void dealProcessTask() throws Exception {        String taskId = "42511";  //项目经理审批        Map<String, Object> variable = new HashMap<String, Object>();        variable.put("amount", "300元");        variable.put("reason", "出差");        processEngine.getTaskService().complete(taskId, variable);    }

3）使用runtimeService的方法设置

//2.3、使用runtimeService添加变量    @Test    public void setVariableByRuntime() throws Exception {        String taskId = "47504";  //项目经理审批        Task task = processEngine.getTaskService().createTaskQuery().taskId(taskId).singleResult();        //获得流程实例id        String processInstanceId = task.getProcessInstanceId();        //String executionId = "601";        String variableName = "amount3";        Object value = "300元";        processEngine.getRuntimeService().setVariable(processInstanceId, variableName, value);    }

4）使用TaskService的方法设置

  //2.4、使用runtimeService添加变量    @Test    public void setVariableByTask() throws Exception {        String taskId = "47504";  //项目经理审批        //String executionId = "601";        String variableName = "amount4";        Object value = "300元";        processEngine.getTaskService().setVariable(taskId, variableName, value);        Map<String, Object> variable = new HashMap<String, Object>();        variable.put("amount4", "300元");        variable.put("reason4", "出差");        processEngine.getTaskService().setVariables(taskId, variable);    }

4、获取流程变量

1）使用runtimeService的方法获取

 //3.2、获取流程变量    @Test    public void getVariableByRuntime() throws Exception {        String taskId = "47504";        Task task = processEngine.getTaskService().createTaskQuery().taskId(taskId).singleResult();        //获得流程实例id        String processInstanceId = task.getProcessInstanceId();        Map<String, Object> variables = processEngine.getRuntimeService().getVariables(processInstanceId);        for (Map.Entry<String, Object> entry : variables.entrySet()) {            System.out.println("Key = " + entry.getKey() + ", Value = " + entry.getValue());        }        Object value = processEngine.getRuntimeService().getVariable(processInstanceId, "user");        System.out.println("Value = " + value);    }  ```2）使用TaskService的方法获取 ```//2.4、使用runtimeService添加变量    @Test    public void getVariableByTask() throws Exception {        String taskId = "47504";  //项目经理审批        Map<String, Object> variables = processEngine.getTaskService().getVariables(taskId);        for (Map.Entry<String, Object> entry : variables.entrySet()) {            System.out.println("Key = " + entry.getKey() + ", Value = " + entry.getValue());        }    } ```*-----------------------------------------------------------------------------------------------------------------------------------------------------*java架构师项目实战,高并发集群分布式,大数据高可用视频教程，共760G--------------------------------------**下载地址：**

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