我正在尝试解析像这样的JSON字符串
[
{
"updated_at":"2012-03-02 21:06:01",
"fetched_at":"2012-03-02 21:28:37.728840",
"description":null,
"language":null,
"title":"JOHN",
"url":"http://rus.JOHN.JOHN/rss.php",
"icon_url":null,
"logo_url":null,
"id":"4f4791da203d0c2d76000035",
"modified":"2012-03-02 23:28:58.840076"
},
{
"updated_at":"2012-03-02 14:07:44",
"fetched_at":"2012-03-02 21:28:37.033108",
"description":null,
"language":null,
"title":"PETER",
"url":"http://PETER.PETER.lv/rss.php",
"icon_url":null,
"logo_url":null,
"id":"4f476f61203d0c2d89000253",
"modified":"2012-03-02 23:28:57.928001"
}
]
进入一个对象列表.
List<ChannelSearchEnum> lcs = (List<ChannelSearchEnum>) new Gson().fromJson( jstring , ChannelSearchEnum.class);
这是我正在使用的对象类.
import com.google.gson.annotations.SerializedName;
public class ChannelSearchEnum {
@SerializedName("updated_at")
private String updated_at;
@SerializedName("fetched_at")
private String fetched_at;
@SerializedName("description")
private String description;
@SerializedName("language")
private String language;
@SerializedName("title")
private String title;
@SerializedName("url")
private String url;
@SerializedName("icon_url")
private String icon_url;
@SerializedName("logo_url")
private String logo_url;
@SerializedName("id")
private String id;
@SerializedName("modified")
private String modified;
public final String get_Updated_at() {
return this.updated_at;
}
public final String get_Fetched_at() {
return this.fetched_at;
}
public final String get_Description() {
return this.description;
}
public final String get_Language() {
return this.language;
}
public final String get_Title() {
return this.title;
}
public final String get_Url() {
return this.url;
}
public final String get_Icon_url() {
return this.icon_url;
}
public final String get_Logo_url() {
return this.logo_url;
}
public final String get_Id() {
return this.id;
}
public final String get_Modified() {
return this.modified;
}
}
但它让我失望
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2
任何想法我该如何解决?
解决方法:
问题是你告诉Gson你有一个类型的对象.你没有.您有一个类型的对象数组.你不能试着像这样投射结果并期望它神奇地工作;)
Gson的用户指南解释了如何处理这个问题:
https://github.com/google/gson/blob/master/UserGuide.md
这将有效:
ChannelSearchEnum[] enums = gson.fromJson(yourJson, ChannelSearchEnum[].class);
但这更好:
Type collectionType = new TypeToken<Collection<ChannelSearchEnum>>(){}.getType();
Collection<ChannelSearchEnum> enums = gson.fromJson(yourJson, collectionType);