与@RequestMapping注释中的params属性一起使用时，@ RequestBody不起作用

Question

我的下面的代码工作正常并从@RequestBody参数

读取xml内容

@RequestMapping(method = RequestMethod.POST, value = "{clientCode}/paybycell.xml")
public ModelAndView payByCell(
        HttpServletRequest request,
        HttpServletResponse response,
        @RequestBody String xml,
        @PathVariable("clientCode") String clCode,
        @RequestParam Integer customerID)
        throws InvalidRequestXMLException, InternalException, Exception {
    info("request body=="+xml);
    getService().validateCityCodeCid(clCode, customerID);
    payByCell(xml, clCode, customerID);
    response.setStatus(HttpStatus.SC_OK);
    return null;
}

日志文件显示内容，例如

request body==<?xml version="1.0"encoding="utf-8" ?>
<PayByCell>

但是我想在不同的方法上使用相同的url模式也请求参数，因此我在@RequestMapping元素中添加了params属性，如下所示

@RequestMapping(method = RequestMethod.POST, value = "/{clientCode}/paybycell.xml", params = { "customerID", "vendorName"})
public ModelAndView payByCellMultipleVendor(
        HttpServletRequest request,
        HttpServletResponse response,
        @RequestBody String xml,
        @PathVariable("clientCode") String clCode,
        @RequestParam("customerID") Integer customerID,
        @RequestParam("vendorName") String vendorName)
        throws InvalidRequestXMLException, InternalException, Exception {
    if (vendorName == null) {
        throw new BadRequestException("Check vendorName");
    }
    info("request body=="+xml);
    getService().validateCityCodeCid(clCode, customerID);
    payByCell(xml, clCode, customerID, vendorName);
    response.setStatus(HttpStatus.SC_OK);
    return null;
}

但现在我的@RequestBody内容未被阅读，并在日志中显示空白，如

request body==

出了什么问题。？

提前感谢任何帮助