jQuery.validator.addMethod("checkRuleName",function(value, element) {

        var rst = false;

            //校验规则组合名称是否重复

            $.ajax({

                    type : "post",

                    cache : false,

                    async: false,//

                    url: '${ctx}/ProductPackageRule/Contro/checkRuleName',

                    //?groupName='+value

                    data:{'ruleName':value},

                    success : function(result) {

                         if(result=="0")

                            {

                                rst = true;

                            }

                    }

                });    

        return rst;

    },"规则名称重复!");    

@RequiresPermissions("/ProductPackageRule/Contro:view")

    @RequestMapping(value ="checkRuleName", method = { RequestMethod.GET, RequestMethod.POST })

    @ResponseBody    //一定要记得加上

    public int checkRuleName(String ruleName)

    {

        int k=1;

        ProductPackageRuleModel model = new ProductPackageRuleModel();

        model.setRuleName(ruleName);

        List<ProductPackageRuleModel> list = productPackageRuleDao.checkRuleName(model);

        if (list.isEmpty()) {

        k=0;

        }

        return k;

    }