问一下在struts2中获取ext,或者dojo 的数据出现了异常？这是怎么回事情？

问一下在struts2中获取ext,或者dojo 的数据出现了异常？这是怎么回事情？
我的客户端：

function login() {  
	dojo.xhrGet({
	        url: "login.htm",
	        handleAs: "json",
	        load: function(data){ 
	               // dojo.byId('myBox').value = data;
					console.debug("success: ", data);
	        },
	        error: function(data){
	                console.debug("An error occurred: ", data);
	        },
	        form: "loginFrom"
	});
}
dojo.connect(dojo.byId("sub"),"onclick",login);  

在 struts2的action中代码：

HttpServletRequest requests=ServletActionContext.getRequest();
System.out.println("UserName :: "+requests.getParameter("UserName"));

出现了这个错误：

2008-11-04 10:52:41,671 [com.opensymphony.xwork2.interceptor.ParametersInterceptor]-[ERROR] ParametersInterceptor - [setParameters]: Unexpected Exception caught setting 'Password' on 'class com.fantong.canting.web.action.LoginAction: Error setting expression 'Password' with value ['test', ]
2008-11-04 10:52:41,671 [com.opensymphony.xwork2.interceptor.ParametersInterceptor]-[ERROR] ParametersInterceptor - [setParameters]: Unexpected Exception caught setting 'UserName' on 'class com.fantong.canting.web.action.LoginAction: Error setting expression 'UserName' with value ['test', ]

在提交的数据中没有问题呀；怎么回出现这个问题，如何解决？？？

评论

2 楼 ccue 2009-04-14  

我在struts2只能用这个呢
dojo.io.bind({
url:"../ajax/loadCommodity.action",
handle:drawTable,
     method:"GET",
     sync:false,
     mimetype:"text/json",
     content:{id:commodityId}   
     });
用这个dojo.xhrGet({url:"../ajax/loadCommodity.action",
            handleAs:"json",
            load:drawTable,
            content:{id:commodityId}});
报错：
[Exception... "'Error: dojo.xhrGet is not a function' when calling method: [nsIDOMEventListener::handleEvent]" nsresult: "0x8057001c (NS_ERROR_XPC_JS_THREW_JS_OBJECT)" location: "<unknown>" data: no]

1 楼 sgp2004 2008-12-06  

你试试这个struts.xml中修改  <constant name="struts.devMode" value="false" />

出处：
http://203.208.39.99/search?q=cache:JExt9NHd7CsJ:blog.csdn.net/dabao_java/archive/2008/11/26/3377811.aspx+Error+setting+expression&hl=zh-CN&ct=clnk&cd=8&gl=cn&client=aff-cs-maxthon&st_usg=ALhdy29LyDoXFJYDLO8PoBN-2UL3WV8-YQ