请帮我这个降压:无法将START_ARRAY标记的java.lang.String实例反序列化;
Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Can not deserialize instance of java.lang.String out of START_ARRAY token; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_ARRAY token
at [Source: [email protected]; line: 1, column: 31]
我发送以下JSON请求:
{"title": "Test", "category": ["2","4","3",1], "description": "Test", "username": ""}
在 “类别” 栏中出现的错误。
我用一个PostgreSQL数据库 和我有以下型号:
@Id
@Column(name = "ID")
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "idea_seq")
@SequenceGenerator(name = "idea_seq", sequenceName = "idea_seq", allocationSize = 1)
private Integer id;
@Column(name = "TITLE", length = 100)
@NotNull
@Size(min = 1, max = 100)
private String title;
@Column(name = "CATEGORY", length = 10)
@NotNull
@Size(min = 1, max = 100)
private String[] category;
@Column(name = "DESCRIPTION", length = 1000)
@NotNull
@Size(min = 1, max = 1000)
private String description;
@Column(name = "USERNAME", length = 100)
@NotNull
@Size(min = 1, max = 100)
private String username;
我会很高兴的任何帮助。我已经有这个bug几天了。
发布相关代码,以及完整的excatption堆栈跟踪。另外,修复你的JSON:',1]'应该是',“1”]'。 –
当我谷歌此错误消息在StackOverflow显示了三个其他线程。你有没有检查过它们是否适合你的问题? – Lothar
嗨JB Nizet,我已经发布了整个异常堆栈跟踪。什么是你的相关代码? @洛塔尔:你真的认为我不会先检查那些人吗? – justus