JSON 解析错误：无法从 START_OBJECT 令牌反序列化 java.util.ArrayList 的实例
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/45663891/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
JSON parse error: Can not deserialize instance of java.util.ArrayList out of START_OBJECT token
提问by
I'm using spring boot and and spring data in my project and i have two classes:
我在我的项目中使用 spring boot 和 spring 数据，我有两个类：
@Entity
public class Mission implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue( strategy = GenerationType.IDENTITY )
private Long id;
private String departure;
private String arrival;
private Boolean isFreeWayEnabled;
@OneToMany( mappedBy = "mission" )
private List<Station> stations;
// getters and setters
}
and the second class:
第二类：
@Entity
public class Station implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue( strategy = GenerationType.IDENTITY )
private Long id;
private String station;
@ManyToOne( fetch = FetchType.LAZY )
@JsonBackReference
private Mission mission;
//getters and setters
}
and the controller:
和控制器：
@RequestMapping( value = "mission/addMission", method = RequestMethod.POST, consumes = "application/json;charset=UTF-8" )
public Reponse addMission( @RequestBody Mission mission ) throws ServletException {
if ( messages != null ) {
return new Reponse( -1, messages );
}
boolean flag = false;
try {
application.addMision( mission );
application.addStation( mission.getStations(), mission.getId() );
flag = true;
} catch ( Exception e ) {
return new Reponse( 5, Static.getErreursForException( e ) );
}
return new Reponse( 0, flag );
}
The problem is when I'm trying to add a new mission with JSON:
问题是当我尝试使用 JSON 添加新任务时：
{"departure":"fff","arrival":"ffff","isFreeWayEnabled":false,stations:{"id":1}
{"出发":"fff","到达":"ffff","isFreeWayEnabled":false,stations:{"id":1}
采纳答案by Amer Qarabsa
You are trying to deserialize an object into a list. You need Stations to be JSON array
您正在尝试将对象反序列化为列表。您需要 Stations 为 JSON 数组
{"departure":"fff","arrival":"ffff","isFreeWayEnabled":false,stations:[{"id":1}, {"id":2}]}
