如何在java中获取我的模型的save（）？

Question

Netbeans很友善地为我创造了这个课程。但我想知道如何将数据保存到数据库中？

我认为会是这样......

Content $content = new Content();

$content->setName();
$content->save();

但我没有看到任何保存功能或暗示可以保存此内容的任何内容。我可以编写查询等等，但是使用它创建的注释似乎已经内置了支持。

@Entity
@Table(name = "content")
@XmlRootElement
@NamedQueries({
    @NamedQuery(name = "Content.findAll", query = "SELECT c FROM Content c"),
    @NamedQuery(name = "Content.findById", query = "SELECT c FROM Content c WHERE c.id = :id"),
    @NamedQuery(name = "Content.findByUserId", query = "SELECT c FROM Content c WHERE c.userId = :userId")})
public class Content implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @NotNull
    @Column(name = "id")
    private Integer id;
    @Basic(optional = false)
    @NotNull
    @Column(name = "user_id")
    private int userId;
    @Basic(optional = false)
    @NotNull
    @Lob
    @Size(min = 1, max = 65535)
    @Column(name = "body")
    private String body;

    public Content() {
    }

    public Content(Integer id) {
        this.id = id;
    }

    public Content(Integer id, int userId, String body) {
        this.id = id;
        this.userId = userId;
        this.body = body;
    }

    public Integer getId() {
        return id;
    }

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

    public int getUserId() {
        return userId;
    }

    public void setUserId(int userId) {
        this.userId = userId;
    }

    public String getBody() {
        return body;
    }

    public void setBody(String body) {
        this.body = body;
    }

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (id != null ? id.hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof Content)) {
            return false;
        }
        Content other = (Content) object;
        if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "model.Content[ id=" + id + " ]";
    }

}