org.postgresql.util.PSQLException： ERROR： value too long for type charactervariing（255）

当我执行我的项目时，我收到这个错误：

目标是使用休眠将文本保存到数据库中。json

Users.java & UsersBooks.java同样，

书籍.java：

@Entity
@Table(name="tblbooks")
public class Books {


@Id
@Column(name = "bookshareId")
private int bookshareId;

@Column(name="author")
private String author;

@Column(name = "availableToDownload")
private int availableToDownload;

@Column(name = "briefSynopsis")
private String briefSynopsis;

@Column(name="category")
private String category;

@Column(name = "completeSynopsis")
private String completeSynopsis;

@Column(name = "contentId")
private int contentId;

@Column(name = "copyright")
private Date copyright;

@Column(name="downloadFormat")
private String downloadFormat;

@Column(name="dtbookSize")
private int dtbookSize;

@Column(name = "freelyAvailable")
private int freelyAvailable;

@Column(name = "brf")
private int brf;

@Column(name = "daisy")
private int daisy;

@Column(name = "images")
private int images;

@Column(name = "isbn13")
private String isbn13;

@Column(name="language")
private String language;

@Column(name = "publishDate")
private Date publishDate;

@Column(name = "publisher")
private String publisher;

@Column(name = "quality")
private String quality;

@Column(name = "title")
private String title;

@OneToMany(mappedBy="book")
private List<UsersBooks> usersBooks;



//Getters & Setters