項目中客戶提了一個要求，在進行完操作離開表格頁面后，如果再回到這個頁面，要求能保存以前離開時的樣子，（排序，過濾和條目屬性等等。）
剛開始自己研究了一下代碼，新建一個form來儲存TableFacade的limit屬性到session里，實現了這個功能。
后來發想Jmesa本身就有一個stateAttr屬性用來保存狀態，wiki中有詳細的使用說明：
The State interface is used to set and retrieve the table Limit.
Implementations will set the Limit so that it can be retrieved at a
later time. This is useful so a user can return to a specific table
with it filtered, sorted, and paged exactly like they left it.
All
you have to do is set the stateAttr to the parameter to look for in the
url, or the attribute in the request, to tip the table off that the
Limit in the users session should be used.
For example in the TableFacade just pass in the name of the parameter to use:
TableFacade tableFacade =TableFacadeFactory.createTableFacade(id, request);
tableFacade.setStateAttr("restore");
The same goes for using the tags:
<jmesa:tableFacade
id="basic"
stateAttr="restore"
...
>
As
you can see in the following example, by passing in a parameter of
"restore=true" then the table is rendered in the same way that you left
it. That is really all there is too it!
Note:
Just be sure that you have a unique table id for each table that you
define. Technically the Limit object for each table is stored in the
users session keyed by the table id. If the tables are not unique then
you will overwrite one Limit with another.