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

1 @Entity 2 @Table(name = "ICT_COMPUTER_LOCATION") 3 public class IctComputerLocation { 4     private static final long serialVersionUID = 1L; 5  6     private Integer id; 7     /** IDC编号 */ 8     private String idcNum; 9 10     private Integer ictBaseId;11 12     /** IctBase实体类 */13     private IctBase ictBase;14 15     @Id16     @GeneratedValue(strategy = GenerationType.AUTO)17     @Column(name = "ID")18     public Integer getId() {19         return id;20     }21 22     public void setId(Integer id) {23         this.id = id;24     }25 26     @Column(name = "IDC_NUM")27     public String getIdcNum() {28         return idcNum;29     }30 31     public void setIdcNum(String idcNum) {32         this.idcNum = idcNum;33     }34 35     @Column(name = "ICT_BASE_ID")36     public Integer getIctBaseId() {37         return ictBaseId;38     }39 40     public void setIctBaseId(Integer ictBaseId) {41         this.ictBaseId = ictBaseId;42     }43 44     @ManyToOne(fetch = FetchType.LAZY)45     @JoinColumn(name = "ICT_BASE_ID", referencedColumnName = "ID", unique = false, nullable = false, insertable = false, updatable = false)46     @NotFound(action=NotFoundAction.IGNORE)47     public IctBase getIctBase() {48         return ictBase;49     }50 51     public void setIctBase(IctBase ictBase) {52         this.ictBase = ictBase;53     }