ajax传集合list

function newLinebydraw(){
    if ($("input[name='cskIds2']:checked").length <= 0) {
       openmsg("请选择要生成的行项目!");
       return false;
    }
    var _list = [];
    debugger
    $("input[name='cskIds2']").each(function(index,obj) {
       debugger
       if ($(obj).is(':checked')) {
           debugger
           var mroRecover = {};
           mroRecover.prodId = $("input[name='mroRecovers[" + index + "].prodId']").val();
           mroRecover.prodCode = $("input[name='mroRecovers[" + index + "].prodCode']").val();
           mroRecover.prodAbbr = $("input[name='mroRecovers[" + index + "].prodAbbr']").val();
           mroRecover.prodScale = $("input[name='mroRecovers[" + index + "].prodScale']").val();
           mroRecover.cf01 = $("input[name='mroRecovers[" + index + "].cf01']").val();
           mroRecover.count = $("input[name='mroRecovers[" + index + "].count']").val();
           mroRecover.unit = $("input[name='mroRecovers[" + index + "].unit']").val();
           _list.push(mroRecover);
    　　}
    });
            
    $.ajax({  
       　url : '${ctx }/mro/sell/newLinebydraw.do',  
       　data : "list="+JSON.stringify(_list),//这里需要json化  
         type : "POST",  
         success : function(data) {  
            alert(data);  
         }  
    });    
}

@RequestMapping(value="newLinebydraw.do")
@ResponseBody
public String newLinebydraw(LoginUser user,@RequestParam("list")String mroRecoverList ) throws JsonParseException, JsonMappingException, IOException{
　　//jackson对象  
　　ObjectMapper mapper = new ObjectMapper();  
　　//使用jackson将json转为List<User>  
　　JavaType jt = mapper.getTypeFactory().constructParametricType(ArrayList.class, MroRecover.class);     
　　List<MroRecover> list =  (List<MroRecover>)mapper.readValue(mroRecoverList, jt);  
　　for (MroRecover mroRecover : list) {
　　　　return "111";
　　}
　　return "OK";  
}