（九）Activitivi5之使用 RuntimeService 设置和获取流程变量

一、案例

　　/** 
　　　* 设置流程变量数据
     */
    @Test
    public void setVariableValues(){
        RuntimeService runtimeService=processEngine.getRuntimeService(); // 任务Service
        String executionId="90001";
        runtimeService.setVariable(executionId, "days", 2);
        runtimeService.setVariable(executionId, "date", new Date());
        runtimeService.setVariable(executionId, "reason", "发烧");
        Student student=new Student();
        student.setId(1);
        student.setName("张三");
        runtimeService.setVariable(executionId, "student", student); // 存序列化对象
    }
    
    /**
     * 获取流程变量数据
     */
    @Test
    public void getVariableValues(){
        RuntimeService runtimeService=processEngine.getRuntimeService(); // 任务Service
        String executionId="102501";
        Integer days=(Integer) runtimeService.getVariable(executionId, "days");
        Date date=(Date) runtimeService.getVariable(executionId, "date");
        String reason=(String) runtimeService.getVariable(executionId, "reason");
        Student student=(Student) runtimeService.getVariable(executionId, "student"); 
        System.out.println("请假天数："+days);
        System.out.println("请假日期："+date);
        System.out.println("请假原因："+reason);
        System.out.println("请假对象："+student.getId()+","+student.getName());
    }
    
    

• 用RuntimeService 设置/获取变量的方法跟（八）Activiti之流程变量和局部流程变量不同的是，流程变量绑定的是任务ID，如下图
• 

  而RuntimeService绑定的是act_ru_execution表的executionId。任务ID随着任务节点的变化而变化，而executionId一般不会改变。

• 同样，用RuntimeService设置的值同样在接下来的流程都可以获取，知道流程结束