action中：private List<Admins> entities;private Admins admin;public Admins getAdmin() {return admin;}public List<Admins> getEntities() {return entities;}public String execute(){AdminsService asi = new AdminsServiceImpl();entities = asi.getObjects(Admins.class);admin = (Admins) asi.findObjectById(Admins.class, 1);}配置文件中的内容为形式1：<result type="json"> <param name="root"></param> </result>测试的结果为：{"admin":{"address":null,"cellPhone":null,"email":null,"id":1,"password":"ssssssss1","realName":"sss1","role":null,"sex":null,"userName":"redarmy1"},"entities":[{"address":null,"cellPhone":null,"email":null,"id":1,"password":"ssssssss1","realName":"sss1","role":null,"sex":null,"userName":"redarmy1"},{"address":null,"cellPhone":null,"email":null,"id":2,"password":"ssssssss2","realName":"sss2","role":null,"sex":null,"userName":"redarmy2"}, {"address":null,"cellPhone":null,"email":null,"id":6,"password":"ssssssss6","realName":"sss6","role":null,"sex":null,"userName":"redarmy6"},{"address":null,"cellPhone":null,"email":null,"id":7,"password":"ssssssss7","realName":"sss7","role":null,"sex":null,"userName":"redarmy7"},{"address":null,"cellPhone":null,"email":null,"id":8,"password":"ssssssss8","realName":"sss8","role":null,"sex":null,"userName":"redarmy8"},{"address":null,"cellPhone":null,"email":null,"id":9,"password":"ssssssss9","realName":"sss9","role":null,"sex":null,"userName":"redarmy9"},{"address":null,"cellPhone":null,"email":null,"id":3,"password":"ssssssss3","realName":"sss3","role":null,"sex":null,"userName":"redarmy3"},{"address":null,"cellPhone":null,"email":null,"id":4,"password":"ssssssss4","realName":"sss4","role":null,"sex":null,"userName":"redarmy4"},{"address":null,"cellPhone":null,"email":null,"id":5,"password":"ssssssss5","realName":"sss5","role":null,"sex":null,"userName":"redarmy5"}]}因为前面返回的是一个admins对象还有一个集合对象，而且又没有设置要按哪个根节点元素去遍历。所以会把所有的信息都显示出来，返回的不是真正的json数据形式2：以entities为根去遍历，所有返回的是真正的json数据，会显示出自动提示效果<result type="json"> <param name="root">entities</param> </result>形式3：<result type="json"><param name="root">entities,admin</param></result>响应为{"address":null,"cellPhone":null,"email":null,"id":1,"password":"ssssssss1","realName":"sss1","role":null,"sex":null,"userName":"redarmy1"}因为设置了两个根节点，所有第一个根节点会被第二个根节点顶替，会按照第二个参数去设置，但返回的不是真正的json数据，所有不会出现自动提示功能形式4：<result type="json"><param name="includeProperties">entities</param></result> 响应为：{"entities":[]}includeProperties会包含参数作为属性，所以查不到内容形式5：<result type="json"><param name="includeProperties">entities\[\d+\]\.realName</param></result> 响应为：{"entities":[{"realName":"sss1"},{"realName":"sss2"},{"realName":"sss6"},{"realName":"sss7"},{"realName":"sss8"},{"realName":"sss9"},{"realName":"sss3"},{"realName":"sss4"},{"realName":"sss5"}]}includeProperties是包含参数作为作为属性，entities\[\d+\]\.realName是以entities作为根节点去遍历下面的realName，返回的不是真正的json数据形式6：<result type="json"><param name="includeProperties">^entities\[\d+\]\.realName</param></result>响应为：{"entities":[{"realName":"sss1"},{"realName":"sss2"},{"realName":"sss6"},{"realName":"sss7"},{"realName":"sss8"},{"realName":"sss9"},{"realName":"sss3"},{"realName":"sss4"},{"realName":"sss5"}]}^:匹配输入字符串的开始位置。如果设置了 RegExp 对象的 Multiline 属性，^ 也匹配 '\n' 或 '\r' 之后的位置。原因同上，不过由于list集合的根节点本来就是entities，所有全部匹配
