Java 如何将 JSON 字段名称映射到不同的对象字段名称？
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How to map JSON field names to different object field names?
提问by Blessed Geek
What is the equiv way in Hymanson json annotation for the following jax-b annotations?
以下 jax-b 注释在 Hymanson json 注释中的等效方式是什么？
I need to produce json rather than xml and need to know the conventional Hymanson annotations that is equivalently denoted in jax-b.
我需要生成 json 而不是 xml，并且需要知道在 jax-b 中等效表示的常规 Hymanson 注释。
- rename a field.
- use getters instead of fields.
- 重命名字段。
- 使用 getter 而不是字段。
These features are especially crucial if the json/xml element name is a java reserved word
like "new", "public", "static", etc.
如果 json/xml 元素名称是 Java 保留字，如“ new”、“ public”、“ static”等，则这些功能尤其重要。
So that we have to name the POJO fields as "_new_", "_public_", "_static_", etc, respectively,
所以我们必须将 POJO 字段分别命名为“_new_”、“_public_”、“_static_”等，
but use jax-b annotation to rename them back to "new", "public", "static", etc in the generated XML (and json) elements.
但是在生成的 XML（和 json）元素中使用 jax-b 注释将它们重命名回“new”、“public”、“static”等。
Renaming a field
重命名字段
@XmlAccessorType(XmlAccessType.FIELD)
public class Person{
@XmlElement(required = true)
protected String name;
@XmlElement(required = true)
protected String address;
@XmlElement(name = "contractor")
protected boolean _restricted_ ;
@XmlElement(name = "new")
protected boolean _new_ ;
}
Redirect to using property getter(I think this is how it is done in jax-b)
重定向到使用属性 getter（我认为这是在 jax-b 中完成的方式）
@XmlAccessorType(XmlAccessType.PROPERTY)
public class Person{
protected String name;
protected String address;
protected boolean _restricted_ ;
protected boolean _new_ ;
@XmlElement(required = true)
protected String getName() {return name;}
@XmlElement(required = true)
protected String getAddress() {return address;}
@XmlElement(name = "contractor")
protected boolean getRestricted() {return _restricted_;}
@XmlElement(name = "new")
protected boolean getNew(){return _new_;}
}
采纳答案by Enrichman
Probably it's a bit late but anyway..
可能有点晚了，但无论如何..
you can rename a property just adding
你可以重命名一个属性只是添加
@JsonProperty("contractor")
And by default Hymanson use the getter and setter to serialize and deserialize.
默认情况下，Hymanson 使用 getter 和 setter 来序列化和反序列化。
For more detailed information: http://wiki.fasterxml.com/HymansonFAQ
更多详细信息：http: //wiki.fasterxml.com/HymansonFAQ
回答by Vijai
With some example, You can also use it in getter and setter to rename it to different field
举个例子，你也可以在 getter 和 setter 中使用它来将它重命名为不同的字段
public class Sample {
private String fruit;
@JsonProperty("get_apple")
public void setFruit(String fruit) {
this.fruit = fruit;
}
@JsonProperty("send_apple")
public String getFruit() {
return fruit;
}
}
回答by Florin As?voaie
Please note that the proper JavaEE API for this is to use the javax.json.bind.annotation.JsonbPropertyannotation. Of course Hymanson and others are just some implementations of the JSON Binding API, they will likely comply with this.
请注意，正确的 JavaEE API 是使用javax.json.bind.annotation.JsonbProperty注释。当然，Hymanson 和其他人只是 JSON Binding API 的一些实现，他们很可能会遵守这一点。
