Java –将对象转换为地图示例

心已赠人 2023-02-15 05:17 132阅读 0赞

在Java中，您可以使用[Jackson][]库将Java对象轻松转换为`Map` 。

## 1.得到杰克逊 ##

pom.xml

<dependency>
    	<groupId>com.fasterxml.jackson.core</groupId>
    	<artifactId>jackson-databind</artifactId>
    	<version>2.6.3</version>
    </dependency>

## 2.将对象转换为地图 ##

2.1杰克逊2示例，将`Student`对象转换为`java.util.Map`

Student.java

package com.mkyong.examples;
    
    import java.util.List;
    
    public class Student {
    
        private String name;
        private int age;
        private List<String> skills;
    
        // getters setters
    }

ObjectToMapExample.java

package com.mkyong.examples;
    
    import com.fasterxml.jackson.databind.ObjectMapper;
    import java.util.Arrays;
    import java.util.Map;
    
    public class ObjectToMapExample {
    
        public static void main(String[] args) {
    
            ObjectMapper oMapper = new ObjectMapper();
    
            Student obj = new Student();
            obj.setName("mkyong");
            obj.setAge(34);
            obj.setSkills(Arrays.asList("java","node"));
    
            // object -> Map
            Map<String, Object> map = oMapper.convertValue(obj, Map.class);
            System.out.println(map);
    
        }
    
    }

输出量

{name=mkyong, age=34, skills=[java, node]}

## 参考文献 ##

1.  [杰克逊2 –如何将对象转换为JSON][2 _JSON]
2.  [杰克逊@Github][Jackson]
3.  [杰克逊之家][Link 1]

标签： [转换][Link 2] [杰克逊][Link 3] [Java][] [地图][Link 4] [对象][Link 5]

> 翻译自: [https://mkyong.com/java/java-convert-object-to-map-example/][https_mkyong.com_java_java-convert-object-to-map-example]

[Jackson]: https://github.com/FasterXML/jackson
[2 _JSON]: https://www.mkyong.com/java/jackson-2-convert-java-object-to-from-json/
[Link 1]: http://wiki.fasterxml.com/JacksonHome
[Link 2]: https://mkyong.com/tag/convert/
[Link 3]: https://mkyong.com/tag/jackson/
[Java]: https://mkyong.com/tag/java/
[Link 4]: https://mkyong.com/tag/map/
[Link 5]: https://mkyong.com/tag/object/
[https_mkyong.com_java_java-convert-object-to-map-example]: https://mkyong.com/java/java-convert-object-to-map-example/