java - 无法在 foreach 中使用 hibernate 实体

Question

我是 hibernate 初学者，我的代码中有 1 个错误，我不知道如何解决它。为什么我不能在 foreach 中使用我的实体。 Error in foreach

这是由idea创建的BookEntity类。

hibernate 版本5.0.1；java SDK版本10.0.1

@Entity
 @Table(name = "book", schema = "library")
 public class BookEntity {

private boolean edit;
private long id;
private String name;
private long author;
private int publishYear;
private long publisherId;

public boolean isEdit(){return edit; }
public void setEdit(boolean edit){this.edit = edit;}

@Id
@Column(name = "id", nullable = false)
public long getId() {
    return id;
}
public void setId(long id) {
    this.id = id;
}

@Basic
@Column(name = "author_id", nullable = false, length = 20)
public long getAuthor() {return author; }
public void setAuthor(long author) {this.author = author;}

@Basic
@Column(name = "name", nullable = false, length = 45)
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}

@Basic
@Column(name = "publish_year", nullable = false)
public int getPublishYear() {
    return publishYear;
}
public void setPublishYear(int publishYear) {
    this.publishYear = publishYear;
}


@Basic
@Column(name = "publisher_id", nullable = false)
public long getPublisherId() {
    return publisherId;
}
public void setPublisherId(long publisherId) {
    this.publisherId = publisherId;
}

    }

我将非常感谢您的帮助

Answer 1

可能是因为您没有定义 bookList以正确的方式。

如果您有以下情况之一:

• List bookList = new ArrayList();
• List<Object> bookList = new ArrayList<>();

将其更改为 List<BookEntity> booklist = new ArrayList<>();它会工作得很好。