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

 

下面贴出hibernate 注解的实例代码

 

@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;}