{
"LocalLocationId [id=1]":{
"type":"folderlocation",
"id":{
"type":"locallocationid",
"id":1
},
"parentId":{
"type":"locallocationid",
"id":0
},
"name":"Test",
"accessibleToUser":true,
"defaultLocation":false,
"timezoneId":"Asia/Calcutta",
"children":[]
},
"LocalLocationId [id=0]":{
"type":"folderlocation",
"id":{
"type":"locallocationid",
"id":0
},
"parentId":null,
"name":"Locations",
"accessibleToUser":false,
"defaultLocation":false,
"timezoneId":"Asia/Calcutta",
"children":[{
"type":"locallocationid",
"id":1
}]
},
"allAllowedChildren":[{
"type":"locallocationid",
"id":1
}]
}
如何将上面的字符串反序列化为java对象。
我使用的类是
public class Tree {
@SerializedName("allAllowedChildren")
private List<Id> allAllowedChildren;
@SerializedName("LocalLocationId")
private Map<String, LocalLocationId> localLocationId;
public class LocalLocationId {
@SerializedName("type")
private String type;
@SerializedName("name")
private String name;
@SerializedName("accessibleToUser")
private boolean accessibleToUser;
@SerializedName("defaultLocation")
private boolean defaultLocation;
@SerializedName("timezoneId")
private String timezoneId;
@SerializedName("id")
private Id id;
@SerializedName("parentId")
private Id parentId;
@SerializedName("children")
private List<Id> children;
public String getType() {
return type;
}
public String getName() {
return name;
}
public boolean isAccessibleToUser() {
return accessibleToUser;
}
public boolean isDefaultLocation() {
return defaultLocation;
}
public String getTimezoneId() {
return timezoneId;
}
public Id getId() {
return id;
}
public Id getParentId() {
return parentId;
}
public List<Id> getChildren() {
return children;
}
}
public class Id {
private String type;
private Integer id;
public String getType() {
return type;
}
public Integer getId() {
return id;
}
}
public List<Id> getAllAllowedChildren() {
return allAllowedChildren;
}
public Map<String, LocalLocationId> getLocalLocationId() {
return localLocationId;
}
}
最佳答案
@Kedar
我假设您可以控制 JSON 输入字符串的创建方式。 我认为对于 Map 类型的默认 GSON 反序列化,JSON 字符串的格式不正确。
我已经修改了输入字符串供您考虑,这会导致 LocalLocationId 非空
{
"LocalLocationId":[
[
"1",
{
"type":"folderlocation",
"id":{
"type":"locallocationid",
"id":1
},
"parentId":{
"type":"locallocationid",
"id":0
},
"name":"Test",
"accessibleToUser":true,
"defaultLocation":false,
"timezoneId":"Asia/Calcutta",
"children":[]
}
],
[
"2",
{
"type":"folderlocation",
"id":{
"type":"locallocationid",
"id":0
},
"parentId":null,
"name":"Locations",
"accessibleToUser":false,
"defaultLocation":false,
"timezoneId":"Asia/Calcutta",
"children":[{
"type":"locallocationid",
"id":1
}]
}
]
],
"allAllowedChildren":[{
"type":"locallocationid",
"id":1
}]
}
如果我对输入字符串的假设不正确,请发表评论。
编辑1: 由于无法修改输入,请考虑编写自定义反序列化器。 下面是注册自定义反序列化类的方法
GsonBuilder gsonb = new GsonBuilder();
gsonb.registerTypeAdapter(Tree.class, new TreeDeserializer());
Gson gson = gsonb.create();
下面是 TreeDeserializer
public class TreeDeserializer implements JsonDeserializer<Tree> {
public Tree deserialize(JsonElement json, Type typeOfT,
JsonDeserializationContext context) throws JsonParseException {
Tree out = new Tree();
if (json != null) {
JsonObject obj = json.getAsJsonObject();
Set<Map.Entry<String,JsonElement>> entries = obj.entrySet();
for (Map.Entry<String, JsonElement> e: entries) {
if (e.getKey().equals("allAllowedChildren")) {
Type ft = List.class;
System.out.println(context.deserialize(e.getValue(), ft));
// TODO add this back into the Tree out object
} else {
// LocalLocationId
System.out.println(e.getKey());
System.out.println(context.deserialize(e.getValue(), Tree.LocalLocationId.class));
// TODO add this back into the Tree out object
}
}
}
return out;
}
}
这是 Sysouts 的控制台输出。
LocalLocationId [id=1]
org.test.StackOverflowAnswers.Tree$LocalLocationId@464bee09
LocalLocationId [id=0]
org.test.StackOverflowAnswers.Tree$LocalLocationId@f6c48ac
[{type=locallocationid, id=1.0}]
org.test.StackOverflowAnswers.Tree@589838eb
我已将 TODO 留在反序列化器中,您需要编写自定义代码以将反序列化中的值注入(inject)到刚刚创建的 Tree 类中。希望这可以帮助。无法提供完整的实现,但我认为这将是部分解决方案
关于java - 如何将json字符串反序列化为对象,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32860614/