杰克逊：只序列化标记的字段 [英] Jackson: Serialize only marked fields

问题描述

我试图做一些在gson中很容易的事情。自从我切换到串行器的杰克逊，我无法弄清楚如何实现这一点：

我想只序列化由注释标记的字段。 GSON代码是：

  class Foo {
 @Expose 
 public String sometext =Hello World ; 
 @Expose 
 public int somenumber = 30; 
 public float noop = 1.0; 
 ... 
} 
  

这会导致（JSON） p>

  {
 Foo：{
 sometext：'Hello World'，
 somenumber：30 
 
 
 
 
 $ b（语法错误可能会被忽略 - 源代码仅用于演示）  
 
 
那么杰克逊对应的gson的 @Expose 和新的GsonBuilder（）。excludeFieldsWithoutExposeAnnotation （）.create（）; ？ 
解决方案 
似乎有一种方法可以配置 ObjectMapper 来忽略所有 
 
 
  ObjectMapper mapper = new ObjectMapper（）; 
 mapper.setVisibilityChecker（getSerializationConfig（）。getDefaultVisibilityChecker（）
 .withCreatorVisibility（JsonAutoDetect.Visibility.NONE）$ b $ withFieldVisibility（JsonAutoDetect.Visibility.NONE）
 .withGetterVisibility（JsonAutoDetect。 Visibility.NONE）
 .withIsGetterVisibility（JsonAutoDetect.Visibility.NONE）
 .withSetterVisibility（JsonAutoDetect.Visibility.NONE））; 
  
 来源 
 
I am trying to do something which was quite easy in gson. Since I switched to Jackson as serializer, I couldn't figure out how to implement this:

I want to serialize only fields that have been marked by an Annotation. GSON code would be:
class Foo {
    @Expose
    public String sometext="Hello World";
    @Expose
    public int somenumber=30;
    public float noop=1.0;
    ...
 }
which should result in (JSON)
 {
    Foo: {
        sometext:'Hello World',
        somenumber: 30
    }
 }
(Syntax errors may be ignored - source is just for demonstration)

So what's the Jackson counterpart for gson's @Expose and new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create();? 
解决方案
There seems to be a way to configure ObjectMapper to ignore all non annotated fields.
ObjectMapper mapper = new ObjectMapper();
mapper.setVisibilityChecker(getSerializationConfig().getDefaultVisibilityChecker()
.withCreatorVisibility(JsonAutoDetect.Visibility.NONE)
.withFieldVisibility(JsonAutoDetect.Visibility.NONE)
.withGetterVisibility(JsonAutoDetect.Visibility.NONE)
.withIsGetterVisibility(JsonAutoDetect.Visibility.NONE)
.withSetterVisibility(JsonAutoDetect.Visibility.NONE));
Source

                        
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