Tomcat7 get ajax's post type data OK.Why wildFly8-Alpha4 not OK ?

code section:

$.ajax({url:"addPrinciple.htm",

     type:"POST",

     async:false,

     data:{"princ1":princ1},

     success:function(data){

          alert("ok!");    

     }

});

environment：freemarker + Spring + wildFly8-Alpha4 + jdk1.7.0_25-b17 

Can anybody help me?