解析错误字段作为对象或数组 [英] Error parsing field as object or array
问题描述
我有以下的JSON字符串，这我假设反序列化。现在的问题是：由于这串来自于一台服务器，我不能改变它，我需要反序列化的POJO。你可以看到 Grafs 键为每个分区不同的值。之一是一个对象的其他阵列。我该如何处理呢？
i have the following Json string, which I'm suppose to deserialize. The problem is: since this string comes from a server I can't change it and I need to deserialize as POJO. You can see that the Grafs keys have different values for each subarea. One is an object an the other an array. How can I handle this?
{
"Status": "true",
"Result: {
"rows": {
"row": {
"status": true,
"subareas": [
{
"nome": "Associacao Utente",
"id": 9,
"grafs": {
"rows": {
"id": 6,
"nome": "Associacao Utente",
"tipo": "PIE",
"serv": "MV_AS_UTENTE_POR_NEGOCIO",
"periodo": "ANO"
}
}
}, {
"nome": "Chaves",
"id": 60,
"grafs": {
"rows": [
{
"id": 35,
"nome": "Chaves Criados por ano",
"tipo": "LINHA",
"serv": "MV_ASSOC_TOTAL_CHAVES",
"periodo": "ANO"
}, {
"id": 592,
"nome": "Chaves Associado Ao User Portal",
"tipo": "BAR",
"serv": "MV_ASSOC_USER_CHAVES",
"periodo": "TODOS"
}, {
"id": 593,
"nome": "Chaves Associado Ao Negocios",
"tipo": "BAR",
"serv": "MV_ASSOC_CHAVES",
"periodo": "TODOS"
}
]
}
}
]
}
}
}
}
下面我如下班。
public class Example {
private String Status;
private Result Result;
public String getStatus() {
return Status;
}
public void setStatus(String status) {
Status = status;
}
public Result getResult() {
return Result;
}
public void setResult(Result result) {
Result = result;
}
@Override
public String toString() {
return "Example [Status=" + Status + ", Result=" + Result + "]";
}
}
public class Result {
private Rows rows;
public Rows getRows() {
return rows;
}
public void setRows(Rows rows) {
this.rows = rows;
}
@Override
public String toString() {
return "Result [rows=" + rows + "]";
}
}
public class Grafs {
private List<Rows_> rows = new ArrayList<>();
public List<Rows_> getRows() {
return rows;
}
public void setRows(List<Rows_> Rows) {
this.rows = Rows;
}
@Override
public String toString() {
return "Grafs [rows=" + rows + "]";
}
}
public class Row {
private Boolean status;
private List<Subarea> subareas = new ArrayList<>();
public Boolean getStatus() {
return status;
}
public void setStatus(Boolean status) {
this.status = status;
}
public List<Subarea> getSubareas() {
return subareas;
}
public void setSubareas(List<Subarea> subareas) {
this.subareas = subareas;
}
@Override
public String toString() {
return "Row [status=" + status + ", subareas=" + subareas + "]";
}
}
public class Row_ {
private Integer id;
private String nome;
private String serv;
private String periodo;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getNome() {
return nome;
}
public void setNome(String nome) {
this.nome = nome;
}
public String getServ() {
return serv;
}
public void setServ(String serv) {
this.serv = serv;
}
public String getPeriodo() {
return periodo;
}
public void setPeriodo(String periodo) {
this.periodo = periodo;
}
@Override
public String toString() {
return "Row_ [id=" + id + ", nome=" + nome + ", serv=" + serv
+ ", periodo=" + periodo + "]";
}
}
public class Rows {
private Row row;
public Row getRow() {
return row;
}
public void setRow(Row row) {
this.row = row;
}
@Override
public String toString() {
return "Rows [row=" + row + "]";
}
}
public class Rows_ {
private Row_ row;
public Row_ getRow() {
return row;
}
public void setRow(Row_ row) {
this.row = row;
}
}
public class Subarea {
private String nome;
private Integer id;
private Grafs grafs;
public String getNome() {
return nome;
}
public void setNome(String nome) {
this.nome = nome;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Grafs getGrafs() {
return grafs;
}
public void setGrafs(Grafs grafs) {
this.grafs = grafs;
}
@Override
public String toString() {
return "Subarea [nome=" + nome + ", id=" + id + ", grafs=" + grafs
+ "]";
}
}
使用这些类，我发现了以下错误：
Using these classes I'm getting the following error:
Expected BEGIN_ARRAY but was BEGIN_OBJECT at line 13 column 18.
我宣布Rows_作为一个ArrayList和它遇到的物体来代替。但第二Rows_确实是一个数组。我怎样才能解决这个问题？
I declared Rows_ as an arraylist and it encounters an object instead. But the second Rows_ is an array indeed. How can i address this?
一个数组元素应该仍然呈现为数组。这就是为什么我使用的阵列。但它给我描述的错误。
Arrays with one element should still be rendered as arrays. That's why I used arrays. But it's giving the error I described.
感谢您的帮助。我真的AP preciate它。
Thanks for your help. I really appreciate it.
推荐答案
您可以使用<一个href=\"https://google-gson.google$c$c.com/svn/trunk/gson/docs/javadocs/com/google/gson/TypeAdapterFactory.html\"相对=nofollow> TypeAdapterFactory 做转换。这里是一个工厂，这将是功能添加到您所有的列表成员类型 -
You can use TypeAdapterFactory to do the conversion. Here is a factory that will add that functionality to all of your List member types --
import com.google.gson.Gson;
import com.google.gson.TypeAdapter;
import com.google.gson.TypeAdapterFactory;
import com.google.gson.reflect.TypeToken;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;
import java.io.IOException;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Collections;
import java.util.List;
public class SingletonListTypeAdapterFactory implements TypeAdapterFactory {
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> typeToken) {
Type type = typeToken.getType();
if (typeToken.getRawType() != List.class
|| !(type instanceof ParameterizedType)) {
return null;
}
Type elementType = ((ParameterizedType) type).getActualTypeArguments()[0];
TypeAdapter<?> elementAdapter = gson.getAdapter(TypeToken.get(elementType));
TypeAdapter<T> arrayAdapter = gson.getDelegateAdapter(this, typeToken);
return (TypeAdapter<T>) newSingtonListAdapter((TypeAdapter<Object>) elementAdapter, (TypeAdapter<List<Object>>) arrayAdapter);
}
private <E> TypeAdapter<List<E>> newSingtonListAdapter(
final TypeAdapter<E> elementAdapter,
final TypeAdapter<List<E>> arrayAdapter) {
return new TypeAdapter<List<E>>() {
public void write(JsonWriter out, List<E> value) throws IOException {
if(value == null || value.isEmpty()) {
out.nullValue();
} else if(value.size() == 1) {
elementAdapter.write(out, value.get(0));
} else {
arrayAdapter.write(out, value);
}
}
public List<E> read(JsonReader in) throws IOException {
if (in.peek() != JsonToken.BEGIN_ARRAY) {
E obj = elementAdapter.read(in);
return Collections.singletonList(obj);
}
return arrayAdapter.read(in);
}
};
}
}
作为奖励，它也序列化以同样的方式，如果需要的话。如果你也想为序列化数组，替换写方法通过调用 arrayAdapter.write 。
要你，当构建添加到您的GSON -
To you, add to your gson when building --
Gson gson = new GsonBuilder().registerTypeAdapterFactory(new SingletonListTypeAdapterFactory())
.create();
这篇关于解析错误字段作为对象或数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
