Jackson解析JSON，其中包含对象数组和带有动态键的地图数组 [英] Jackson parsing JSON containing an array of objects and array of maps w/ dynamic keys

问题描述

我有这样的json:

{

    "users":{
           "1234":{
                 "firstname":"Joe",
                 "lastname":"Smith"
           },
           "9876":{
                 "firstname":"Bob",
                 "lastname":"Anderson"
           }
    },
    "jobs":[
          {
              "id":"abc",
              "location":"store"
          },
          {
              "id":"def",
              "location":"factory"
          }
    ]
}

我正在使用Jackson进行解析，因此我一直在使用以下方法来解析响应:readvalue(json，MyCustomClass.class)

I'm parsing this using Jackson and so I have been parsing responses using: readvalue(json, MyCustomClass.class)

MyCustomClass的外观

Where MyCustomClass looks like

public class MyCustomClass{
      @JsonProperty("jobs")
      ArrayList<Job> jobs;

      @JsonProperty("users")
      ArrayList<UserMap> usersMap;
}

现在，作业可以完美地解析为Jobs对象，但是我无法让用户解析，因为它们具有动态键.我读到有关JsonAnyGetter/Setter的内容，并尝试制作映射字符串的UserMap对象映射->用户，如:

Now the jobs parse perfectly into Jobs objects but I can't get the users to parse since they have dynamic keys. I read about JsonAnyGetter/Setter and tried making the UserMap object map that maps a string -> User like:

public class UserMap {

private HashMap<String,User> usersMap;


@JsonAnySetter
public void add(String key, User user){
    usersMap.put(key, user);
}

@JsonAnyGetter
public Map<String, User> getUsersMap(){
    return usersMap;
}


}

但这不起作用.我想我可以使用TypeReference包装器来做到这一点，但是如果那些映射是我返回的唯一类型，那么我只能想到一种方法.由于我回来了不同的类型(用户和工作)，是否可以这样做?

but that doesn't work. I think I can do it with a TypeReference wrapper but I only can think of a way to do that if those maps were the only type I was getting back. Since I am getting different types back (users and jobs) is it possible to do this?

推荐答案

解决方案:

public class MyCustomClass {
    @JsonProperty("users")
    public LinkedHashMap<String, User> users;

    @JsonProperty("jobs")
    public ArrayList<Job> jobs;
}    

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