router传递hashmap参数问题

PageA : 
  const paramsMap = new HashMap<string, Object>(); 
const value1 = new SomeObj(); 
paramsMap.set(‘key1’, value1); 
paramsMap.set(‘key2’, ‘value2’); 
router.pushNamedRoute({ 
  name: ‘PageB’, params: paramsMap 
}); 
 
PageB : 在另一个har包内 
const params: HashMap<string, Object> = router.getParams() as HashMap<string, Object> 
// 打印params结果是{} 
 
const value1: SomeObj = params.get(‘key1’) as SomeObj; 
// get会发生错误。