jsp文件中，代码如下：

$.ajax({
            type : "POST", // 提交方式
            url : appUrl + "/management/freightDetail/freightGeneral/codeOutDetial",// 路径
            traditional : true,
            data:  {
                "idList" :idList,
                "cusId" :cusId,
                "carrierId" :carrierId,
                "settlementCurr":settlementCurr
                    },
            contentType : "application/x-www-form-urlencoded",//这里的编码不要修改
            dataType : "json",
            success : function(result) { 
            
                if(result != null ) {
                    if(result["success"] == "falseCarrier")
                    {
                        alertMsg.info('请选择同一承运商的单据!');
                    }
                    if(result["success"] == "falseSettle")
                    {
                        alertMsg.info('请选择同一结算币种的单据!');
                    }
                    if(result["success"] == "success")
                    {
                    }
                }
                
            }
          });

java文件中，代码如下：

    @RequiresPermissions("SearchFreightBill:save")
    @RequestMapping(value="/codeOutDetial", method={RequestMethod.GET, RequestMethod.POST})
    public @ResponseBody String codeOutDetial(@RequestParam(value = "idList", required = false) String idList,
            @RequestParam(value = "cusId", required = false) Long cusId,
            @RequestParam(value = "carrierId", required = false) Long carrierId,
            @RequestParam(value = "settlementCurr", required = false) String settlementCurr) {
        JSONObject result = new JSONObject();
        
        List<Long> ids = new ArrayList();
        Set<Long> carrierCheck = new HashSet<Long>();
        List<Object[]> settleCheck = new ArrayList<Object[]>();
        
        settleCheck = outDetailService.combinationOfCurr(ids);
        if(settleCheck.size()>1)
        {
            result.put("success", "falseSettle");
            return result.toString();
        }else
        {
            if(carrierCheck.size()>1)
            {
                result.put("success", "falseCarrier");
            }
            return result.toString();
        }
    }