（九）Activitivi5之使用 RuntimeService 設置和獲取流程變量

一、案例

　　/** 
　　　* 設置流程變量數據
     */
    @Test
    public void setVariableValues(){
        RuntimeService runtimeService=processEngine.getRuntimeService(); // 任務Service
        String executionId="90001";
        runtimeService.setVariable(executionId, "days", 2);
        runtimeService.setVariable(executionId, "date", new Date());
        runtimeService.setVariable(executionId, "reason", "發燒");
        Student student=new Student();
        student.setId(1);
        student.setName("張三");
        runtimeService.setVariable(executionId, "student", student); // 存序列化對象
    }
    
    /**
     * 獲取流程變量數據
     */
    @Test
    public void getVariableValues(){
        RuntimeService runtimeService=processEngine.getRuntimeService(); // 任務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("請假天數："+days);
        System.out.println("請假日期："+date);
        System.out.println("請假原因："+reason);
        System.out.println("請假對象："+student.getId()+","+student.getName());
    }
    
    

• 用RuntimeService 設置/獲取變量的方法跟（八）Activiti之流程變量和局部流程變量不同的是，流程變量綁定的是任務ID，如下圖
• 

  而RuntimeService綁定的是act_ru_execution表的executionId。任務ID隨着任務節點的變化而變化，而executionId一般不會改變。

• 同樣，用RuntimeService設置的值同樣在接下來的流程都可以獲取，知道流程結束