Web开发笔记 #08# Jackson组合多个对象的属性构成JSON(以及添加自定义属性)

参考文档:https://github.com/FasterXML/jackson-databind

关于ObjectMapper的线程安全

截自官方文档:

组合多个对象的属性构成JSON(以及添加自定义属性)

Code:

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

public class TestJackson {

    private static final ObjectMapper MAPPER = new ObjectMapper();

    public static void main(String[] args) {
        Foo foo = new Foo("value1", "value2");
        Bar bar = new Bar("value3", "value4");
        ObjectNode root = MAPPER.valueToTree(foo);
        ObjectNode node = MAPPER.valueToTree(bar);
        root.setAll(node);
        root.put("extraFiled", "value5");
        String jsonString = null;
        try {
            jsonString = MAPPER.writerWithDefaultPrettyPrinter().writeValueAsString(root);
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }
        System.out.println(jsonString);
    }
}

Output:

Web开发笔记 #08# Jackson组合多个对象的属性构成JSON(以及添加自定义属性)_第1张图片

PS. 单词打错:filed => field

 

转载于:https://www.cnblogs.com/xkxf/p/10113215.html

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