小编Zel*_*eel的帖子

我正在尝试使用Hibernate来持久化这样的类:

public class Item implements Serializable, Comparable<Item> {

// Item id
private Integer id;

// Description of item in inventory
private String description;

// Number of items described by this inventory item
private int count;

 //Category item belongs to 
private String category;

// Date item was purchased 
private GregorianCalendar purchaseDate;

    public Item() {
}

    public Integer getId() {
    return id;
}

public void setId(Integer id) {
    this.id = id;
}

    public String getDescription() {
    return description;
}

public void setDescription(String …