Hibernate异常No row with the given identifier exists 解决方法

产生此问题的原因:
             有两张表,删除主键数据，导致外键数据找不到引用了，这样就会报No row with the given identifier exists这个错.(一句话,就是数据的
现在hibernate配置可以基于xml配置文件和注解方式，这两种方式都能发生这个异常
xml配置文件解决方法（或者手动恢复数据）：

<many-to-one class="com.art.model.user.UserInfo" fetch="join" name="userInfo" >  
   <column name="userId" unique="true"/>  
</many-to-one> 

修改后的：

<many-to-one class="com.art.model.user.UserInfo" fetch="join" name="userInfo" not-found="ignore">  
   <column name="userId" unique="true"/>  
</many-to-one> 

红色是修改的部分。意思是当对应的数据不存在时 忽略掉，用null值填充。该属性默认值：exception 。

注解配置解决方法：
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
如果是使用的freemarker的话
使用

<#if rankchange.dictNowRanks?exists>${rankchange.dictNowRanks.vcName}</#if>

由于dictNowRanks找不到会抛出exception，所以?exists都是true，都是会进入的。使用@NotFound(action=NotFoundAction.IGNORE之后，找不到则忽略，相当于返回空
下面贴出hibernate 注解的实例代码

@Entity
@Table(name = "PM_BSC_RANK_CHANGE")
@SequenceGenerator(name="sg", sequenceName="SEQ_PM_BSC_RANK_CHANGE", allocationSize=1)
@org.hibernate.annotations.Entity(dynamicInsert = true, dynamicUpdate = true)
public class PmBscRankChange extends BizEntity{

	// Fields

	private Long pid;
	private PmBscStaffInfo pmBscStaffInfo;
	private Date vcNowDate;
	private Date vcChgDate;
	private String vcRemark;
	private Long vcIfedit;
	private Long vcType;
	private Date vcEndDate;
	
	//private Date vcCreateDate;

	private PmBscDict dictNowRanks;//调动前职级
	private PmBscDict dictChgRanks;//调动后职级
	// Constructors

	/** default constructor */
	public PmBscRankChange() {
	}

	/** minimal constructor */
	public PmBscRankChange(Long pid) {
		this.pid = pid;
	}

	// Property accessors
	@Id
	@Column(name = "PID", unique = true, nullable = false, precision = 20, scale = 0)
	@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="sg")
	public Long getPid() {
		return this.pid;
	}

	public void setPid(Long pid) {
		this.pid = pid;
	}

	@ManyToOne(fetch = FetchType.LAZY)
	@JoinColumn(name = "VC_STAFF_ID")
	public PmBscStaffInfo getPmBscStaffInfo() {
		return this.pmBscStaffInfo;
	}

	public void setPmBscStaffInfo(PmBscStaffInfo pmBscStaffInfo) {
		this.pmBscStaffInfo = pmBscStaffInfo;
	}

	@Column(name = "VC_NOW_DATE")
	public Date getVcNowDate() {
		return this.vcNowDate;
	}

	public void setVcNowDate(Date vcNowDate) {
		this.vcNowDate = vcNowDate;
	}

	@Column(name = "VC_CHG_DATE")
	public Date getVcChgDate() {
		return this.vcChgDate;
	}

	public void setVcChgDate(Date vcChgDate) {
		this.vcChgDate = vcChgDate;
	}

	@Column(name = "VC_REMARK", length = 1000)
	public String getVcRemark() {
		return this.vcRemark;
	}

	public void setVcRemark(String vcRemark) {
		this.vcRemark = vcRemark;
	}

	
	@ManyToOne(fetch = FetchType.LAZY)
	@JoinColumn(name = "VC_NOW_RANK", columnDefinition="NUMBER(20)", nullable=false)
	@NotFound(action=NotFoundAction.IGNORE)    
	public PmBscDict getDictNowRanks() {
		return dictNowRanks;
	}
	
	public void setDictNowRanks(PmBscDict dictNowRanks) {
		this.dictNowRanks = dictNowRanks;
	}

	@ManyToOne(fetch = FetchType.LAZY)
	@JoinColumn(name = "VC_CHG_RANK", columnDefinition="NUMBER(20)", nullable=false)
	@NotFound(action=NotFoundAction.IGNORE)
	public PmBscDict getDictChgRanks() {
		return dictChgRanks;
	}

	public void setDictChgRanks(PmBscDict dictChgRanks) {
		this.dictChgRanks = dictChgRanks;
	}

	@Column(name = "VC_IFEDIT")
	public Long getVcIfedit() {
		return vcIfedit;
	}

	public void setVcIfedit(Long vcIfedit) {
		this.vcIfedit = vcIfedit;
	}

	@Column(name = "VC_TYPE")
	public Long getVcType() {
		return vcType;
	}

	public void setVcType(Long vcType) {
		this.vcType = vcType;
	}

	@Column(name = "VC_END_DATE")
	public Date getVcEndDate() {
		return vcEndDate;
	}

	public void setVcEndDate(Date vcEndDate) {
		this.vcEndDate = vcEndDate;
	}