List 在Java中未序列化为String

Question

我们有一个类[[Agent，其中assignedUsers为List << [Long] >>]当我们尝试将对象转换为JSON文档时，我们使用的是ObjectMapper

writeValueAsString方法，该方法不会将id序列化为String，而JSON字符串中不会丢失键

assignedUsers。

import java.io.IOException;
import java.util.List;

import com.fasterxml.jackson.databind.ObjectMapper;

public class Agent {
private List<Long> assignedUserIds;
        private String name;

        private static final String json = "{\"name\":\"New Agency\", \"assignedUserIds\":[23,24]}";

        public String getName() {
                return name;
        }

        public void setName(final String name) {
                this.name = name;
        }

        public List<Long> gocuetAssignedUserIds() {
        return assignedUserIds;
        }

        public void setAssignedUserIds(final List<Long> assignedUserIds) {
                this.assignedUserIds = assignedUserIds;
        }

        public static void main(String[] args) {
                Agent agencyInfo = null;
                try {
                        agencyInfo = new ObjectMapper().readValue(json, Agent.class);
                        System.out.println("Built Agent :: " + new ObjectMapper().writeValueAsString(agencyInfo)); // Outputs: Built Agent :: {"name":"New Agency"}
                } catch (IOException e) {
                        e.printStackTrace();
                }
        }
}

[我们有一个类Agent，其AssignedUsers为List

[当我们尝试将对象转换为JSON文档时，我们正在使用ObjectMapper writeValueAsString方法，该方法不会序列化ID ...