【转】hibernate annotation方式配置实体关联关系，解决关联外键数据不存在时抛出异常的问题

使用hibernate 注解配置实体类的关联关系，在many-to-one,one-to-one关联中，一边引用自另一边的属性，如果属性值为某某的数据在数据库不存在了，hibernate默认会抛出异常。解决此问题，加上如下注解就可以了：

@NotFound(action=NotFoundAction.IGNORE)，意思是找不到引用的外键数据时忽略，NotFound默认是exception

@Entity
@Table(name = "ICT_COMPUTER_LOCATION")
public class IctComputerLocation {
    private static final long serialVersionUID = 1L;

    private Integer id;
    /** IDC编号 */
    private String idcNum;

    private Integer ictBaseId;

    /** IctBase实体类 */
    private IctBase ictBase;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "ID")
    public Integer getId() {
        return id;
    }

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

    @Column(name = "IDC_NUM")
    public String getIdcNum() {
        return idcNum;
    }

    public void setIdcNum(String idcNum) {
        this.idcNum = idcNum;
    }

    @Column(name = "ICT_BASE_ID")
    public Integer getIctBaseId() {
        return ictBaseId;
    }

    public void setIctBaseId(Integer ictBaseId) {
        this.ictBaseId = ictBaseId;
    }

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "ICT_BASE_ID", referencedColumnName = "ID", unique = false, nullable = false, insertable = false, updatable = false)
    @NotFound(action=NotFoundAction.IGNORE)
    public IctBase getIctBase() {
        return ictBase;
    }

    public void setIctBase(IctBase ictBase) {
        this.ictBase = ictBase;
    }