java – 带有JPA数据绑定的Spring MVC

我的问题是将 Spring从表单中获取的数据绑定到JPA实体.奇怪的是,如果我不看BindingResults,它的工作正常. BindingResults说当为字段分度传入一个空字符串时会出现绑定错误,但我知道它确实正确绑定它们,因为当我不检查Hibernate时,它会完美地更新数据库.有没有办法不必编写逻辑来绕过错误触发的绑定错误？

@Entity
    @Table(name="child")
    public class Child {

        @Id
        @Column(name="id")
        private Integer childId;

        @ManyToOne(fetch=FetchType.EAGER )
        @JoinColumn(name="house",referencedColumnName="house")
        private House house;

        @NotNull()
        @Past()
        @Column(name="birthday")
        private Date birthday;

        @Column(name="graduation_date")
        private Date graduationDay;

    }

我在属性编辑器中尝试了以下几行无济于事

SimpleDateFormat dateFormat = new SimpleDateFormat("MMM dd,yyyy");
    registry.registerCustomEditor(Date.class,new CustomDateEditor(dateFormat,true));

以下是处理请求的控制器方法的方法签名

@Controller
    @SessionAttributes(value="child")
    @RequestMapping(value="child")
    public class ChildModController {

    @RequestMapping(value="save-child.do",params="update",method = RequestMethod.POST)
    public @ResponseBody Map<String,?> updateChild(

        HttpServletRequest request,@Valid @ModelAttribute(value="child")Child child,BindingResult results)
    }

这是我从BindingResult类中获取的消息

09:01:36.006 [http-thread-pool-28081(5)] INFO  simple - Found fieldError: graduationDay,Failed to convert property value of type java.lang.String to required type java.util.Date for property graduationDay; 
    nested exception is org.springframework.core.convert.ConversionFailedException: 
    Failed to convert from type java.lang.String to type @javax.persistence.Column java.util.Date for value '; 
    nested exception is java.lang.IllegalArgumentException

public class Child {

  @DateTimeFormat(pattern="dd/MM/yyyy")
  private Date birthday;

  @DateTimeFormat(iso=ISO.DATE)
  private Date graduationDay;

  @NumberFormat(style = Style.CURRENCY)
  private Integer myNumber1;

  @NumberFormat(pattern = "###,###")
  private Double myNumber2;

}

public class Color {
  private String colorString;

  public Color(String color){
     this.colorString = color;
  }
}

public class StringToColor implements Converter<String,Color> {
  public Color convert(String source) {
    if(source.equal("red") {
       return new Color("red");
    }

    if(source.equal("green") {
       return new Color("green");
    }

    if(source.equal("blue") {
       return new Color("blue");
    }

    // etc

    return null;
  }
}