如何将空值传递给HashMap？
以下代码段适用于填写的选项:
HashMap<String, String> options = new HashMap<String, String>();
options.put("name", "value");
Person person = sample.searchPerson(options);
System.out.println(Person.getResult().get(o).get(Id));
那么问题是必须输入选项和/或传递空值的方法？
我尝试了以下代码但没有成功:
options.put(null, null);
Person person = sample.searchPerson(null);
options.put(" ", " ");
Person person = sample.searchPerson(null);
options.put("name", " ");
Person person = sample.searchPerson(null);
options.put();
Person person = sample.searchPerson();