这是我的简单豆
@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class Foo {
private String firstName;
private String lastName;
public String getFullName(){
return firstName + lastName;
}
}
当此对象在带有 Jackson 的 Spring-boot 控制器中序列化时,出现以下错误
j.l.NullPointerException: null
com.example.foobar.foo.getFullName(Foo.java:28)
s.r.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java)
s.r.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
s.r.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
j.l.reflect.Method.invoke(Method.java:498)
c.f.j.d.s.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:653)
c.f.j.d.s.s.BeanSerializerBase.serializeFields(BeanSerializerBase.java:690)..
28 common frames omitted\nWrapped by: c.f.j.d.JsonMappingException: (was java.lang.NullPointerException)
(through reference chain: com.example.foobar.foo[\"fullName\"])
c.f.j.d.JsonMappingException.wrapWithPath(JsonMappingException.java:379)
c.f.j.d.JsonMappingException.wrapWithPath(JsonMappingException.java:339)
c.f.j.d.s.s.StdSerializer.wrapAndThrow(StdSerializer.java:343)
c.f.j.d.s.s.BeanSerializerBase.serializeFields(BeanSerializerBase.java:698)
c.f.j.d.s.BeanSerializer.serialize(BeanSerializer.java:155)
c.f.j.d.s.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:292)
c.f.j.d.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1419)
c.f.j.d.ObjectWriter.writeValue(ObjectWriter.java:940)
o.s.h.c.j.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:267)...
23 common frames omitted\nWrapped by: o.s.h.c.HttpMessageNotWritableException: Could not write content: (was java.lang.NullPointerException) (through reference chain: com.example.foobar.foo[\"fullName\"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: (was java.lang.NullPointerException) (through reference chain: com.example.foobar.foo[\"fullName\"])
o.s.h.c.j.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:274 ..."
这是我发送的 requestBody
{"firstName": "foo",
"lastName: null
}
Jackson 是否正在尝试序列化 fullName 属性?但我没有声明这样的字段。这是预期的行为吗?我找不到支持这种行为的文档。
谢谢