将 JSON 子对象属性绑定到 Jackson 中的 Java 对象字段
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Binding JSON child object property into Java object field in Hymanson
提问by hleinone
I have a JSON object, say:
我有一个 JSON 对象，例如：
{
"foo": {
"bar": 1
},
"baz": 2
}
and I want to bind it into a Java object, like:
我想将它绑定到一个 Java 对象中，例如：
@JsonIgnoreProperties(ignoreUnknown = true)
public class Foo {
private int bar;
@JsonProperty("baz")
private int baz;
}
How can I set the value of foo.barfrom JSON to the barfield in the FooJava object?
如何将foo.barJSON的值设置bar为FooJava 对象中的字段？
I've tried annotating the field with @JsonProperty("foo.bar"), but it doesn't work like that.
我试过用 注释该字段@JsonProperty("foo.bar")，但它不能那样工作。
回答by hleinone
This ain't perfect but it's the most elegant way I could figure out.
这并不完美，但这是我能想到的最优雅的方式。
@JsonProperty("foo")
public void setFoo(Map<String, Object> foo) {
bar = (Integer) foo.get("bar");
}
回答by StaxMan
There is no automated functionality for this (as far as I know), but this is a somewhat often requested feature; there is this Jira RFE: http://jira.codehaus.org/browse/HymanSON-132that sounds like what you are looking for.
这没有自动化功能（据我所知），但这是一个经常被要求的功能；有这个 Jira RFE：http: //jira.codehaus.org/browse/HymanSON-132听起来像你正在寻找的。
回答by Wilson Soethe Cursino
Here a quick example that works:
这是一个有效的快速示例：
JSON:
JSON：
[{"function":{"name":"Function 1"}},
{"function":{"name":"Function 2"}}]
Java:
爪哇：
import java.util.Map;
import javax.xml.bind.annotation.XmlRootElement;
import lombok.Getter;
import lombok.Setter;
import lombok.ToString;
import org.codehaus.Hymanson.annotate.JsonIgnoreProperties;
import org.codehaus.Hymanson.annotate.JsonProperty;
@Getter
@Setter
@ToString
@JsonIgnoreProperties(ignoreUnknown = true)
public class Function {
@JsonProperty("name")
private String name;
@JsonProperty("function")
public void setFunction(Map<String, Object> function) {
name = (String) function.get("name");
}
}
回答by Dennis
That's like binding an apple to an orange! Another 'catchy phrase' would be, "Impedance Mismatch", or in Star Trek 1, "Non Sequetor!" Bind it a MATCHED object, then do new assignment in Java between the different kinds of objects.
这就像把一个苹果绑在一个橙子上！另一个“朗朗上口的短语”是“阻抗不匹配”，或者在《星际迷航 1》中，“Non Sequetor！” 将它绑定一个 MATCHED 对象，然后在 Java 中在不同类型的对象之间进行新的赋值。
