Spring MVC中慎用SessionForm

在session form 模式之下，form保存在Session当中，这就意味着每个Session只有一个Form Backing Object，如果同时打开两个页面来编辑同一对象的不同实例时，就会有冲突产生。

 

比如：A有两个实例a1、a2，这时就有可能将a1的值保存在a2当中。

评论

2 楼 xucons 2009-04-25  

To:smxwjd

对不起，是我的意思表达错了。

protected String getFormSessionAttributeName() { 
    return getClass().getName() + ".FORM." + getCommandName(); 
} 

上面获得的FormSessionAttributeName对于同一个Form Backing Object来说都是一样的。这样打开两个浏览器窗口时，就会发生冲突。

Please note that the AbstractFormController class (and all subclasses of it unless stated to the contrary) do not support the notion of a conversation. This is important in the context of this property, because it means that there is only one form per session: this means that if session form mode is activated and a user opens up say two tabs in their browser and attempts to edit two distinct objects using the same form, then the shared session state can potentially (and most probably will) be overwritten by the last tab to be opened, which can lead to errors when either of the forms in each is finally submitted.

1 楼 smxwjd 2009-04-17  

你搞错了哦~~~看Spring的源码:org.springframework.web.servlet.mvc.AbstractFormController
protected String getFormSessionAttributeName() {
return getClass().getName() + ".FORM." + getCommandName();
}