我有一个java应用程序，使用jpa显示名为MasterScrip的表中的数据。我希望在我的桌子上添加一个额外的字段，但是， 当我向我的数据库表MasterScrip添加一个名为'change'的额外字段时，我得到以下异常，当我删除该字段时，该应用程序正常工作
Exception [EclipseLink-0] (Eclipse Persistence Services - 2.3.0.v20110604-r9504): org.eclipse.persistence.exceptions.IntegrityException
Descriptor Exceptions:
---------------------------------------------------------
Exception [EclipseLink-59] (Eclipse Persistence Services - 2.3.0.v20110604-r9504): org.eclipse.persistence.exceptions.DescriptorException
Exception Description: The instance variable [change] is not defined in the domain class [entity.MasterScrip], or it is not accessible.
Internal Exception: java.lang.NoSuchFieldException: change
Mapping: org.eclipse.persistence.mappings.DirectToFieldMapping[change-->StockCommodityDB.MasterScrip.Change]
Descriptor: RelationalDescriptor(entity.MasterScrip --> [DatabaseTable(StockCommodityDB.MasterScrip)])
这个例外可能是什么原因？我该如何解决？
编辑： MasterScrip.java
@Entity
@Table(name = "MasterScrip", catalog = "StockCommodityDB", schema = "")
@XmlRootElement
@NamedQueries({
@NamedQuery(name = "MasterScrip.findAll", query = "SELECT m FROM MasterScrip m"),
@NamedQuery(name = "MasterScrip.findByScripID", query = "SELECT m FROM MasterScrip m WHERE m.scripID = :scripID"),
@NamedQuery(name = "MasterScrip.findByScripSymbol", query = "SELECT m FROM MasterScrip m WHERE m.scripSymbol = :scripSymbol"),
@NamedQuery(name = "MasterScrip.findByType", query = "SELECT m FROM MasterScrip m WHERE m.type = :type"),
@NamedQuery(name = "MasterScrip.findByCompanyName", query = "SELECT m FROM MasterScrip m WHERE m.companyName = :companyName"),
@NamedQuery(name = "MasterScrip.findByLastTradedPrice", query = "SELECT m FROM MasterScrip m WHERE m.lastTradedPrice = :lastTradedPrice"),
@NamedQuery(name = "MasterScrip.findByLastTradedQuantity", query = "SELECT m FROM MasterScrip m WHERE m.lastTradedQuantity = :lastTradedQuantity"),
@NamedQuery(name = "MasterScrip.findByOpenPrice", query = "SELECT m FROM MasterScrip m WHERE m.openPrice = :openPrice"),
@NamedQuery(name = "MasterScrip.findByHighPrice", query = "SELECT m FROM MasterScrip m WHERE m.highPrice = :highPrice"),
@NamedQuery(name = "MasterScrip.findByLowPrice", query = "SELECT m FROM MasterScrip m WHERE m.lowPrice = :lowPrice"),
@NamedQuery(name = "MasterScrip.findByTotalTradedQuantity", query = "SELECT m FROM MasterScrip m WHERE m.totalTradedQuantity = :totalTradedQuantity"),
@NamedQuery(name = "MasterScrip.findByVolume", query = "SELECT m FROM MasterScrip m WHERE m.volume = :volume"),
@NamedQuery(name = "MasterScrip.findByExchange", query = "SELECT m FROM MasterScrip m WHERE m.exchange = :exchange"),
@NamedQuery(name = "MasterScrip.findByBrokerageCharge", query = "SELECT m FROM MasterScrip m WHERE m.brokerageCharge = :brokerageCharge"),
@NamedQuery(name = "MasterScrip.findByPreviousClose", query = "SELECT m FROM MasterScrip m WHERE m.previousClose = :previousClose"),
@NamedQuery(name = "MasterScrip.findByChange", query = "SELECT m FROM MasterScrip m WHERE m.change = :change")})
public class MasterScrip implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Basic(optional = false)
@NotNull
@Column(name = "ScripID", nullable = false)
private Integer scripID;
@Size(max = 15)
@Column(name = "ScripSymbol", length = 15)
private String scripSymbol;
@Size(max = 10)
@Column(name = "Type", length = 10)
private String type;
@Size(max = 50)
@Column(name = "CompanyName", length = 50)
private String companyName;
// @Max(value=?) @Min(value=?)//if you know range of your decimal fields consider using these annotations to enforce field validation
@Column(name = "LastTradedPrice", precision = 22)
private Double lastTradedPrice;
@Column(name = "LastTradedQuantity")
private Integer lastTradedQuantity;
@Column(name = "OpenPrice", precision = 22)
private Double openPrice;
@Column(name = "HighPrice", precision = 22)
private Double highPrice;
@Column(name = "LowPrice", precision = 22)
private Double lowPrice;
@Column(name = "TotalTradedQuantity")
private Integer totalTradedQuantity;
@Column(name = "Volume")
private Integer volume;
@Size(max = 30)
@Column(name = "Exchange", length = 30)
private String exchange;
@Column(name = "BrokerageCharge", precision = 22)
private Double brokerageCharge;
@Column(name = "PreviousClose", precision = 22)
private Double previousClose;
@Column(name = "Change", precision = 22)
private Double change;
@JoinColumn(name = "CommoditySubCategoryID", referencedColumnName = "CommoditySubCategoryID")
@ManyToOne(fetch = FetchType.EAGER)
private CommoditySubCategoryMaster commoditySubCategoryID;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "scripID", fetch = FetchType.EAGER)
private Collection<UserStock> userStockCollection;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "scripID", fetch = FetchType.EAGER)
private Collection<UserTrack> userTrackCollection;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "scripID", fetch = FetchType.EAGER)
private Collection<OrderStock> orderStockCollection;
@OneToMany(cascade = CascadeType.ALL, mappedBy = "scripID", fetch = FetchType.EAGER)
private Collection<TradeStock> tradeStockCollection;
public MasterScrip() {
}
public MasterScrip(Integer scripID) {
this.scripID = scripID;
}
public Integer getScripID() {
return scripID;
}
public void setScripID(Integer scripID) {
this.scripID = scripID;
}
public String getScripSymbol() {
return scripSymbol;
}
public void setScripSymbol(String scripSymbol) {
this.scripSymbol = scripSymbol;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getCompanyName() {
return companyName;
}
public void setCompanyName(String companyName) {
this.companyName = companyName;
}
public Double getLastTradedPrice() {
return lastTradedPrice;
}
public void setLastTradedPrice(Double lastTradedPrice) {
this.lastTradedPrice = lastTradedPrice;
}
public Integer getLastTradedQuantity() {
return lastTradedQuantity;
}
public void setLastTradedQuantity(Integer lastTradedQuantity) {
this.lastTradedQuantity = lastTradedQuantity;
}
public Double getOpenPrice() {
return openPrice;
}
public void setOpenPrice(Double openPrice) {
this.openPrice = openPrice;
}
public Double getHighPrice() {
return highPrice;
}
public void setHighPrice(Double highPrice) {
this.highPrice = highPrice;
}
public Double getLowPrice() {
return lowPrice;
}
public void setLowPrice(Double lowPrice) {
this.lowPrice = lowPrice;
}
public Integer getTotalTradedQuantity() {
return totalTradedQuantity;
}
public void setTotalTradedQuantity(Integer totalTradedQuantity) {
this.totalTradedQuantity = totalTradedQuantity;
}
public Integer getVolume() {
return volume;
}
public void setVolume(Integer volume) {
this.volume = volume;
}
public String getExchange() {
return exchange;
}
public void setExchange(String exchange) {
this.exchange = exchange;
}
public Double getBrokerageCharge() {
return brokerageCharge;
}
public void setBrokerageCharge(Double brokerageCharge) {
this.brokerageCharge = brokerageCharge;
}
public Double getPreviousClose() {
return previousClose;
}
public void setPreviousClose(Double previousClose) {
this.previousClose = previousClose;
}
public Double getChange() {
return change;
}
public void setChange(Double change) {
this.change = change;
}
public CommoditySubCategoryMaster getCommoditySubCategoryID() {
return commoditySubCategoryID;
}
public void setCommoditySubCategoryID(CommoditySubCategoryMaster commoditySubCategoryID) {
this.commoditySubCategoryID = commoditySubCategoryID;
}
@XmlTransient
public Collection<UserStock> getUserStockCollection() {
return userStockCollection;
}
public void setUserStockCollection(Collection<UserStock> userStockCollection) {
this.userStockCollection = userStockCollection;
}
@XmlTransient
public Collection<UserTrack> getUserTrackCollection() {
return userTrackCollection;
}
public void setUserTrackCollection(Collection<UserTrack> userTrackCollection) {
this.userTrackCollection = userTrackCollection;
}
@XmlTransient
public Collection<OrderStock> getOrderStockCollection() {
return orderStockCollection;
}
public void setOrderStockCollection(Collection<OrderStock> orderStockCollection) {
this.orderStockCollection = orderStockCollection;
}
@XmlTransient
public Collection<TradeStock> getTradeStockCollection() {
return tradeStockCollection;
}
public void setTradeStockCollection(Collection<TradeStock> tradeStockCollection) {
this.tradeStockCollection = tradeStockCollection;
}
@Override
public int hashCode() {
int hash = 0;
hash += (scripID != null ? scripID.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 MasterScrip)) {
return false;
}
MasterScrip other = (MasterScrip) object;
if ((this.scripID == null && other.scripID != null) || (this.scripID != null && !this.scripID.equals(other.scripID))) {
return false;
}
return true;
}
@Override
public String toString() {
return "entity.MasterScrip[ scripID=" + scripID + " ]";
}
}
表格结构：
CREATE TABLE `MasterScrip` (
`ScripID` int(11) NOT NULL AUTO_INCREMENT,
`ScripSymbol` varchar(15) DEFAULT NULL,
`Type` varchar(10) DEFAULT NULL,
`CommoditySubCategoryID` int(11) DEFAULT NULL,
`CompanyName` varchar(50) DEFAULT NULL,
`LastTradedPrice` double DEFAULT NULL,
`LastTradedQuantity` int(11) DEFAULT NULL,
`OpenPrice` double DEFAULT NULL,
`HighPrice` double DEFAULT NULL,
`LowPrice` double DEFAULT NULL,
`TotalTradedQuantity` int(11) DEFAULT NULL,
`Volume` int(11) DEFAULT NULL,
`Exchange` varchar(30) DEFAULT NULL,
`BrokerageCharge` double DEFAULT NULL,
`PreviousClose` double DEFAULT NULL,
`Change` double DEFAULT NULL,
PRIMARY KEY (`ScripID`),
KEY `comSubCatID_fk_constraint` (`CommoditySubCategoryID`),
CONSTRAINT `comSubCatID_fk_constraint` FOREIGN KEY (`CommoditySubCategoryID`) REFERENCES `CommoditySubCategoryMaster` (`CommoditySubCategoryID`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1
答案 0 :(得分：0)
检查您是否使用了包含该字段的orm.xml文件。还要重新启动服务器并确保没有两次映射该类。