* 自由流执行之前，选择跳转到哪个节点.
*/
@RequestMapping("console-prepareJump")
public String prepareJump(@RequestParam("executionId") String executionId,
Model model) {
Command<Map<String, String>> cmd = new ListActivityCmd(executionId);
Map activityMap = processEngine.getManagementService().executeCommand(
cmd);
model.addAttribute("activityMap", activityMap);