如何在struts2动作类中有选择地返回json数据

问题描述：

我在一个动作类中有几个带getter和setter方法的属性。

I have several properties with getter and setter method in one action class.

这些属性不执行相同的任务。实际上，他们会回应不同的商业服务请求，或者他们与不同的行为有关。

Those properties do not perform the same task. Actually, they respond to different business-service requests, or they are related to different actions.

我的问题是这样的：

我需要过滤掉数据并仅返回属性集中的部分属性，因为在单个请求（操作）中并非所有属性都是必需的。

I need to filter out the data and return only part of the properties within the property set because not all properties are necessary in a single request(action).

PS：实际上，我可能已将这些操作或业务逻辑分成几个类，而不是将它们放入一个操作类中。但是，我认为它们都共享相似的DAO和服务，因此我将它们放在一起以防止冗余的IOC。

PS:Actually, I might have separated those actions or business logic into several classes instead of putting them into one action class. However, I think they all share the similar DAOs and services so I put them together in order to prevent redundant IOCs.

答

Struts2-JSON插件允许您排除空属性

<result type="json">
  <param name="excludeNullProperties">true</param>
</result>

或排除某些参数被序列化

or exclude certain parameters from being serialized

<result type="json">
  <param name="excludeProperties">
    login.password,
    studentList.*\.sin
  </param>
</result>

参见文档了解更多详情

如何在struts2动作类中有选择地返回json数据

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