无效的属性＆＃39; environmentId＆＃39;豆类。 Bean property＆＃39; environmentId＆＃39;不可读或具有无效的getter方法

Question

我在后端返回模型对象。我正在尝试从后端到前端创建下拉数据。但是我得到了不可读的异常..

这是我的代码......

public class Customer {
private Environments envrironmentId;
private Environments environmentName;
 getters and setters
}

这是我的控制器层。

@RequestMapping(value="/environments",method = RequestMethod.GET)
    public ModelAndView getenvironments(HttpServletRequest request,
            HttpServletResponse response,@ModelAttribute("customer") Customer customer,@RequestParam String selectedcustomername) throws Exception{
        System.out.println("selected cust name"+selectedcustomername);
        ModelAndView model = null;  
        Map<String, Object> map = new HashMap<String, Object>();
        List<org.mvc.domain.Environments> environmentNames = loginDelegate.getEnvironments(selectedcustomername);
        Collections.sort(environmentNames, new CustomComparator());

        for(int i=0;i<environmentNames.size()-1;i++){
            customer.setEnvrironmentId(environmentNames.get(0));
            customer.setEnvironmentName(environmentNames.get(1));
        }
        map.put("environmentNames", environmentNames);
        model = new ModelAndView("welcome", "map", map);
        return model;

    }

这是我的Ui ..

<form:form method="get" action="retrieve" modelAttribute="customer" commandName="customer">

    <b>Environment:</b>
                            <form:select path="environmentId" id="environmentDetails">                                                                                                                                                  
                            <option selected="selected">Select An Environment</option>
                            <form:options items="${map.environmentNamesList}" itemLabel="environmentName" itemValue="environmentId"/>                                                                                                                                                       
                            </form:select>
                         </td>

这是我的错误..

org.apache.jasper.JasperException: org.springframework.beans.NotReadablePropertyException: Invalid property 'environmentId' of bean class [org.mvc.domain.Customer]: Bean property 'environmentId' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?

任何人都可以帮助我