Question

我很难解码我的json数据。请帮忙。这是我的代码：这就是我的json的样子：

[
   {"0":"6","ID":"6","1":"USA","Country":"USA","2":"1","Age":"1","3":"Type 5","Type":"Type 5","4":"Brand5","Brands":"Brand5","5":"ashfghdfhhgfdhhdfhhdfg\t\t\t\t\t\t","Contents":"ashfghdfhhgfdhhdfhhdfg\t\t\t\t\t\t","6":"0000-00-00 00:00:00","Time":"0000-00-00 00:00:00"},
   {"0":"7","ID":"7","1":"Europe","Country":"Europe","2":"1","Age":"1","3":"Type 5","Type":"Type 5","4":"Brand5","Brands":"Brand5","5":"\t\t\t\tafsfsdgfgh\t\t\t\t\t","Contents":"\t\t\t\tafsfsdgfgh\t\t\t\t\t","6":"0000-00-00 00:00:00","Time":"0000-00-00 00:00:00"},
   {"0":"9","ID":"9","1":"USA","Country":"USA","2":"4","Age":"4","3":"Type3","Type":"Type3","4":"Brand4","Brands":"Brand4","5":"sfdsggfhgfhfhg\t\t","Contents":"sfdsggfhgfhfhg\t\t","6":"0000-00-00 00:00:00","Time":"0000-00-00 00:00:00"},
   {"0":"10","ID":"10","1":"Europe","Country":"Europe","2":"6","Age":"6","3":"Type3","Type":"Type3","4":"Brand4","Brands":"Brand4","5":"\t\t\t\t\tsfgfdgfhhgfdhghg\t\t\t","Contents":"\t\t\t\t\tsfgfdgfhhgfdhghg\t\t\t","6":"2011-06-03 16:07:08","Time":"2011-06-03 16:07:08"}
]

这是我的班级：

public class Foo {

@SerializedName("0")
public String zero;

@SerializedName("ID")
public String ID;

@SerializedName("1")
public String unu;

@SerializedName("Country")
public String Country;

@SerializedName("2")
public String doi;

@SerializedName("Age")
public String Age;

@SerializedName("3")
public String trei;

@SerializedName("Type")
public String Type;

@SerializedName("4")
public String patru;

@SerializedName("Brands")
public String Brands;

@SerializedName("5")
public String cinci;

@SerializedName("Contents")
public String Contents;

@SerializedName("6")
public String sase;

@SerializedName("Time")
public String Time;
  }

这是我的Foo类型列表：

public class FooList {

public List<Foo> listFoo;

}

这就是我尝试解码的方法：

        Gson gson = new Gson();
        Type fooType=new TypeToken<FooList>() { }.getType();
        FooList vaccines=gson.fromJson(json, fooType);

感谢您的帮助。

Answer 1

如果你尝试怎么办？

Gson gson = new Gson();
FooList vaccines = gson.fromJson(json, FooList.class);

你得到什么错误/例外？

<强>更新

问题是您正在尝试将List个项目解码为包含项目列表的对象。如果要解码为FooList，那么您的JSON字符串应如下所示：

{ "listFoo":
  [
    {"0":"6","ID":"6","1":"USA","Country":"USA","2":"1","Age":"1","3":"Type 5","Type":"Type 5","4":"Brand5","Brands":"Brand5","5":"ashfghdfhhgfdhhdfhhdfg\t\t\t\t\t\t","Contents":"ashfghdfhhgfdhhdfhhdfg\t\t\t\t\t\t","6":"0000-00-00 00:00:00","Time":"0000-00-00 00:00:00"},
    {"0":"7","ID":"7","1":"Europe","Country":"Europe","2":"1","Age":"1","3":"Type 5","Type":"Type 5","4":"Brand5","Brands":"Brand5","5":"\t\t\t\tafsfsdgfgh\t\t\t\t\t","Contents":"\t\t\t\tafsfsdgfgh\t\t\t\t\t","6":"0000-00-00 00:00:00","Time":"0000-00-00 00:00:00"},
    {"0":"9","ID":"9","1":"USA","Country":"USA","2":"4","Age":"4","3":"Type3","Type":"Type3","4":"Brand4","Brands":"Brand4","5":"sfdsggfhgfhfhg\t\t","Contents":"sfdsggfhgfhfhg\t\t","6":"0000-00-00 00:00:00","Time":"0000-00-00 00:00:00"},
    {"0":"10","ID":"10","1":"Europe","Country":"Europe","2":"6","Age":"6","3":"Type3","Type":"Type3","4":"Brand4","Brands":"Brand4","5":"\t\t\t\t\tsfgfdgfhhgfdhghg\t\t\t","Contents":"\t\t\t\t\tsfgfdgfhhgfdhghg\t\t\t","6":"2011-06-03 16:07:08","Time":"2011-06-03 16:07:08"}
  ]
}

如果你别无选择，只能使用你提供的JSON字符串，那么你可能会做出像这样的工作：

List listOfObjects = g.fromJson(json, List.class);

for(Object obj : listOfObjects) {
  FooList.listFoo.add((Foo) obj);
}

Answer 2

你几乎得到了它。以下示例均按预期反序列化并运行。

反序列化为Foo数组：

public class Foo
{
  @SerializedName("0")
  String zero;

  @SerializedName("ID")
  String ID;

  @SerializedName("1")
  String unu;

  @SerializedName("Country")
  String Country;

  @SerializedName("2")
  String doi;

  @SerializedName("Age")
  String Age;

  @SerializedName("3")
  String trei;

  @SerializedName("Type")
  String Type;

  @SerializedName("4")
  String patru;

  @SerializedName("Brands")
  String Brands;

  @SerializedName("5")
  String cinci;

  @SerializedName("Contents")
  String Contents;

  @SerializedName("6")
  String sase;

  @SerializedName("Time")
  String Time;

  @Override
  public String toString()
  {
    return String.format(
        "{Foo: zero=%s, ID=%s, unu=%s, Country=%s, doi=%s, Age=%s, trei=%s, Type=%s, patru=%s, Brands=%s, cinci=%s, Contents=%s, sase=%s, Time=%s}", 
        zero, ID, unu, Country, doi, Age, trei, Type, patru, Brands, cinci, Contents, sase, Time);
  }

  public static void main(String[] args) throws Exception
  {
    Gson gson = new Gson();
    Foo[] foos = gson.fromJson(new FileReader("input.json"), Foo[].class);
    System.out.println(Arrays.toString(foos));
  }
}

反序列化为Foo列表：

  public static void main(String[] args) throws Exception
  {
    Gson gson = new Gson();
    Type listOfFooType = new TypeToken<List<Foo>>(){}.getType();
    List<Foo> foos = gson.fromJson(new FileReader("input.json"), listOfFooType);
    System.out.println(foos);
  }

使用Tanner更改的JSON反序列化为FooList：

public class Foo
{
  ...


  public static void main(String[] args) throws Exception
  {
    Gson gson = new Gson();
    FooList fooList = gson.fromJson(new FileReader("input.json"), FooList.class);
    System.out.println(fooList.listFoo);
  }
}

class FooList
{
  List<Foo> listFoo;
}

解码json android

2 个答案: