如何在Spring MVC中获取方法中的参数？

我正在使用Spring MVC。当method = post时，我无法从url获得参数。但是，当我将方法更改为GET时，便可以获取所有参数。

这是我的表格：

@H_944_5@<form method="POST" action="http://localhost:8080/cms/customer/create_customer" id="frmRegister" name ="frmRegister" enctype="multipart/form-data">
    <input class ="iptRegister" type="text" id="txtEmail" name="txtEmail" value="" />
    <input class ="iptRegister" type="password" id="txtpassword" name="txtpassword" value="" />
    <input class ="iptRegister" type="text" id="txtPhone" name="txtPhone" value="" />

    <input type="button" id="btnRegister" name="btnRegister" value="Register" onclick="" style="cursor:pointer"/>
</form>

这是我的控制器：

@H_944_5@@requestMapping(value= "/create_customer",method = requestMethod.POST)
@ResponseBody
public String createCustomer(httpServletrequest request,@requestParam(value="txtEmail",required=falsE) String email,@requestParam(value="txtpassword",required=falsE) String password,@requestParam(value="txtPhone",required=falsE) String phonE){

    ResultDTO<String> rs = new ResultDTO<String>();
    rs.setStatus(IConfig.SHOW_RESULT_succesS_ON_MAIN_SCREEN);
    try{
        Customer c = new Customer();
        c.setEmail(email);
        c.setpassword(password);
        c.setPhone(phonE);
        customerservice.insert(c);
        rs.setData("Insert success");
    }catch(Exception eX){
        log.error(eX);
        rs.setStatus(IConfig.SHOW_RESULT_ERROR_ON_MAIN_SCREEN);
        rs.setData("Insert failure");
    }
    return rs.toString();
}

我该如何解决？