Spring 可以解码@ModelAttribute它是否包含 Long 字段还是 Map 实例？

问：

除了传递 java 对象之外，还有其他方法：@SessionAttributes("entitytopass")

来自“form”servlet / controller ->的 POST 方法

->到“显示”的那个，

如果它包含长字段还是 Map 实例？

经过多次尝试，用于传递，例如：RedirectAttributes redirectAttributesEntity entity

  redirectAttributes.addAttribute("entitytopass", entity);

我惊讶地发现它持续解析从 Long 到 Integer 1 的字段。这会导致无法在接收 Servlet 中构建接收到的对象。因此，下面的方法不成功并抛出：TypeMismatchException

@RequestMapping(value ="/display", method = RequestMethod.GET)  
 public String add(@ModelAttribute("entitytopass") Entity entityreceived, Model model) {  
    model.addAttribute("entitypresented", entityreceived);
  return "/displaypage";  // displaypage.jsp would present saved values  
 }   

解码后的 Spring 错误报告为：Entity entityreceived

Failed to convert value of type 'java.lang.String' to required type 'some.domain.jpa.model.Entity'; 
nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [@org.springframework.web.bind.annotation.ModelAttribute some.domain.jpa.model.Entity] for value '0'; 
nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: Provided id of the wrong type for class some.domain.jpa.model.Entity. Expected: class java.lang.Long, got class java.lang.Integer; 
nested exception is java.lang.IllegalArgumentException: Provided id of the wrong type for class some.domain.jpa.model.Entity. Expected: class java.lang.Long, got class java.lang.Integer 

如果实体是实例，则相同的 happans，尽管从会话中传输和提取的对象经过编码和解码，没有任何问题 beetween servlet / 控制器。Map<String,String>

--编辑--

实体是象征性的，但例如。

public class Entity extends BaseEntity implements Serializable, EntityLabels {
    private static final long serialVersionUID = -3776095967033917869L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "addr_id")
    private long addressId;

    @Column(updatable = true, name = "addr_name", nullable = true, length = 50)
    private String addressName;

    @Column(updatable = true, name = "city", nullable = false, length = 50)
    private String city;

    @Column(updatable = true, name = "post_cod", nullable = false, length = 6)
    private String postalCode;

    @Column(updatable = true, name = "street", nullable = false, length = 50)
    private String streetName;

    @Column(updatable = true, name = "str_no", nullable = false, length = 6)
    private String streetNumber;

    @Column(updatable = true, name = "flat_no", nullable = true, length = 6)
    private String flatNumber;

    @ColumnDefault(value = "'Poland'")
    @Column(updatable = true, name = "country", nullable = false, length = 50)
    private String country; // = "Poland";

    // standard constructor
    public Entity() {
    }

    // getters & setters

}