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I am developing a program that needs to communicate with an online store, all communication is done via HTTP requests and has as response a JSON.
Displays the error com.google.gson.stream.MalformedJsonException. I have already checked several times and even using websites that check the syntax of JSON and the syntax seems to be correct.
I developed a minimal and executable example, replacing the whole part of HTTP requests with a string that stores JSON to simplify since the other parts do not present errors and have data that I cannot pass.
My question is how to solve this mistake com.google.gson.stream.MalformedJsonException in my program. (Follows error log)
Json.class
import com.google.gson.reflect.TypeToken;
import java.lang.reflect.Type;
import java.util.List;
import javax.swing.JOptionPane;
public class Json {
public static void main(String[] args) {
JOptionPane.showMessageDialog(null, "O resultado é exibido no console.");
String strJson = "[\n" +
"{\n" +
"“id”: 1,\n" +
"“createdAt”: “2016-12-27T10:58:13-02:00”,\n" +
"“updatedAt”: “2016-12-27T14:57:39-02:00”,\n" +
"“erpId”: “Armazém 1”,\n" +
"“name”: “Armazém Revenda”,\n" +
"“priority”: 1,\n" +
"“branch”: {\n" +
"“id”: 1,\n" +
"“erpId”: “Filial 1”,\n" +
"“name”: “Filial 1”,\n" +
"“documentId”: “”,\n" +
"“createdAt”: “2016-12-27T10:58:13-02:00”,\n" +
"“updatedAt”: “2016-12-27T10:58:13-02:00”\n" +
"},\n" +
"“default”: true,\n" +
"“quantity”: 1\n" +
"}\n" +
"]";
List<Warehouses> lista = JSONtoList(strJson);
for(Warehouses w: lista) {
System.out.println(w.getId());
System.out.println(w.isDef());
}
}
public static List<Warehouses> JSONtoList(String strJson) {
Type type = new TypeToken<List<Warehouses>>() {
}.getType();
Gson gson = new GsonBuilder().setDateFormat("dd/MM/yyyy").create();
List<Warehouses> lista = gson.fromJson(strJson, type);
return lista;
}
}
Branch.class
import java.util.Date;
public class Branch {
private int id;
private String erpId;
private String name;
private String documentId;
private Date createdAt;
private Date updateAt;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getErpId() {
return erpId;
}
public void setErpId(String erpId) {
this.erpId = erpId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDocumentId() {
return documentId;
}
public void setDocumentId(String documentId) {
this.documentId = documentId;
}
public Date getCreatedAt() {
return createdAt;
}
public void setCreatedAt(Date createdAt) {
this.createdAt = createdAt;
}
public Date getUpdateAt() {
return updateAt;
}
public void setUpdateAt(Date updateAt) {
this.updateAt = updateAt;
}
}
Warehouses.class
import java.util.Date;
import com.google.gson.annotations.SerializedName;
public class Warehouses {
private int id;
private Date createdAt;
private Date updateAt;
private String erpId;
private String name;
private int priority;
private Branch branch;
@SerializedName("default")
private boolean def;
private int quantity;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Date getCreatedAt() {
return createdAt;
}
public void setCreatedAt(Date createdAt) {
this.createdAt = createdAt;
}
public Date getUpdateAt() {
return updateAt;
}
public void setUpdateAt(Date updateAt) {
this.updateAt = updateAt;
}
public String getErpId() {
return erpId;
}
public void setErpId(String erpId) {
this.erpId = erpId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getPriority() {
return priority;
}
public void setPriority(int priority) {
this.priority = priority;
}
public Branch getBranch() {
return branch;
}
public void setBranch(Branch branch) {
this.branch = branch;
}
public boolean isDef() {
return def;
}
public void setDef(boolean def) {
this.def = def;
}
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
}
Error
Exception in thread "main" com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Unterminated object at line 4 column 29 path $[0].null
at com.google.gson.Gson.fromJson(Gson.java:942)
at com.google.gson.Gson.fromJson(Gson.java:892)
at com.google.gson.Gson.fromJson(Gson.java:841)
at json.Json.JSONtoList(Json.java:56)
at json.Json.main(Json.java:42)
Caused by: com.google.gson.stream.MalformedJsonException: Unterminated object at line 4 column 29 path $[0].null
at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:1568)
at com.google.gson.stream.JsonReader.doPeek(JsonReader.java:491)
at com.google.gson.stream.JsonReader.hasNext(JsonReader.java:414)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:216)
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:41)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:82)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:61)
at com.google.gson.Gson.fromJson(Gson.java:927)
... 4 more
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Is this string ai your json file? Lacked the class q converts json.
– user28595
Yes, it’s json. I put the method that converts json to list in Json.class. Its name is Jsontolist
– lys