在Android中使用JPA生成的實體類作爲類liberary

Question

我正在開發客戶端服務器應用程序。在服務器端，我使用JPA2.0和EclipseLink作爲提供程序生成了我的實體數據模型。這裏是其中的一個類

@Entity 
@Table(name = "Customers") 
@XmlRootElement 
@NamedQueries({ 
    @NamedQuery(name = "Customers.findAll", query = "SELECT c FROM Customers c")}) 
public class Customers implements Serializable { 
    private static final long serialVersionUID = 1L; 
    @Id 
    @Basic(optional = false) 
    @Column(name = "SerialNoCST") 
    private Integer serialNoCST; 
    @Basic(optional = false) 
    @Column(name = "SerialNOCSTSGLCST") 
    private int serialNOCSTSGLCST; 
    @Column(name = "NameGrpCST") 
    private String nameGrpCST; 
    @Column(name = "CodeCST") 
    private String codeCST; 
    @Column(name = "NameCST") 
    private String nameCST; 
    @Column(name = "AddressCST") 
    private String addressCST; 
    @Column(name = "TelCST") 
    private String telCST; 
    @Column(name = "DebtCredit") 
    private Long debtCredit; 
    @Column(name = "DocCredit") 
    private Long docCredit; 
    @Column(name = "CshCredit") 
    private Long cshCredit; 
    @Column(name = "DebtValue") 
    private Long debtValue; 
    @Column(name = "ClassNoCST") 
    private String classNoCST; 
    @Column(name = "PasCheqAmntCST") 
    private Integer pasCheqAmntCST; 
    @Column(name = "NPasBillValueCST") 
    private Long nPasBillValueCST; 
    @Column(name = "NPasBillAmntCST") 
    private Integer nPasBillAmntCST; 
    // @Max(value=?) @Min(value=?)//if you know range of your decimal fields consider using these annotations to enforce field validation 
    @Column(name = "MapXCst") 
    private Float mapXCst; 
    @Column(name = "MapYCst") 
    private Float mapYCst; 
    @Column(name = "MapImgCst") 
    private Integer mapImgCst; 
    @Basic(optional = false) 
    @Column(name = "LastModified") 
    @Temporal(TemporalType.TIMESTAMP) 
    private Date lastModified; 
    @Basic(optional = false) 
    @Column(name = "IsDeleted") 
    private boolean isDeleted; 
    @Basic(optional = false) 
    @Column(name = "RowID") 
    private String rowID; 
    @Basic(optional = false) 
    @Column(name = "SerialNoDev") 
    private int serialNoDev; 

    public Customers() { 
    } 

    public Customers(Integer serialNoCST) { 
     this.serialNoCST = serialNoCST; 
    } 

    public Customers(Integer serialNoCST, int serialNOCSTSGLCST, Date lastModified, boolean isDeleted, String rowID, int serialNoDev) { 
     this.serialNoCST = serialNoCST; 
     this.serialNOCSTSGLCST = serialNOCSTSGLCST; 
     this.lastModified = lastModified; 
     this.isDeleted = isDeleted; 
     this.rowID = rowID; 
     this.serialNoDev = serialNoDev; 
    } 

    public Integer getSerialNoCST() { 
     return serialNoCST; 
    } 

    public void setSerialNoCST(Integer serialNoCST) { 
     this.serialNoCST = serialNoCST; 
    } 

    public int getSerialNOCSTSGLCST() { 
     return serialNOCSTSGLCST; 
    } 

    public void setSerialNOCSTSGLCST(int serialNOCSTSGLCST) { 
     this.serialNOCSTSGLCST = serialNOCSTSGLCST; 
    } 

    public String getNameGrpCST() { 
     return nameGrpCST; 
    } 

    public void setNameGrpCST(String nameGrpCST) { 
     this.nameGrpCST = nameGrpCST; 
    } 

    public String getCodeCST() { 
     return codeCST; 
    } 

    public void setCodeCST(String codeCST) { 
     this.codeCST = codeCST; 
    } 

    public String getNameCST() { 
     return nameCST; 
    } 

    public void setNameCST(String nameCST) { 
     this.nameCST = nameCST; 
    } 

    public String getAddressCST() { 
     return addressCST; 
    } 

    public void setAddressCST(String addressCST) { 
     this.addressCST = addressCST; 
    } 

    public String getTelCST() { 
     return telCST; 
    } 

    public void setTelCST(String telCST) { 
     this.telCST = telCST; 
    } 

    public Long getDebtCredit() { 
     return debtCredit; 
    } 

    public void setDebtCredit(Long debtCredit) { 
     this.debtCredit = debtCredit; 
    } 

    public Long getDocCredit() { 
     return docCredit; 
    } 

    public void setDocCredit(Long docCredit) { 
     this.docCredit = docCredit; 
    } 

    public Long getCshCredit() { 
     return cshCredit; 
    } 

    public void setCshCredit(Long cshCredit) { 
     this.cshCredit = cshCredit; 
    } 

    public Long getDebtValue() { 
     return debtValue; 
    } 

    public void setDebtValue(Long debtValue) { 
     this.debtValue = debtValue; 
    } 

    public String getClassNoCST() { 
     return classNoCST; 
    } 

    public void setClassNoCST(String classNoCST) { 
     this.classNoCST = classNoCST; 
    } 

    public Integer getPasCheqAmntCST() { 
     return pasCheqAmntCST; 
    } 

    public void setPasCheqAmntCST(Integer pasCheqAmntCST) { 
     this.pasCheqAmntCST = pasCheqAmntCST; 
    } 

    public Long getNPasBillValueCST() { 
     return nPasBillValueCST; 
    } 

    public void setNPasBillValueCST(Long nPasBillValueCST) { 
     this.nPasBillValueCST = nPasBillValueCST; 
    } 

    public Integer getNPasBillAmntCST() { 
     return nPasBillAmntCST; 
    } 

    public void setNPasBillAmntCST(Integer nPasBillAmntCST) { 
     this.nPasBillAmntCST = nPasBillAmntCST; 
    } 

    public Float getMapXCst() { 
     return mapXCst; 
    } 

    public void setMapXCst(Float mapXCst) { 
     this.mapXCst = mapXCst; 
    } 

    public Float getMapYCst() { 
     return mapYCst; 
    } 

    public void setMapYCst(Float mapYCst) { 
     this.mapYCst = mapYCst; 
    } 

    public Integer getMapImgCst() { 
     return mapImgCst; 
    } 

    public void setMapImgCst(Integer mapImgCst) { 
     this.mapImgCst = mapImgCst; 
    } 

    public Date getLastModified() { 
     return lastModified; 
    } 

    public void setLastModified(Date lastModified) { 
     this.lastModified = lastModified; 
    } 

    public boolean getIsDeleted() { 
     return isDeleted; 
    } 

    public void setIsDeleted(boolean isDeleted) { 
     this.isDeleted = isDeleted; 
    } 

    public String getRowID() { 
     return rowID; 
    } 

    public void setRowID(String rowID) { 
     this.rowID = rowID; 
    } 

    public int getSerialNoDev() { 
     return serialNoDev; 
    } 

    public void setSerialNoDev(int serialNoDev) { 
     this.serialNoDev = serialNoDev; 
    } 

    @Override 
    public int hashCode() { 
     int hash = 0; 
     hash += (serialNoCST != null ? serialNoCST.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 Customers)) { 
      return false; 
     } 
     Customers other = (Customers) object; 
     if ((this.serialNoCST == null && other.serialNoCST != null) || (this.serialNoCST != null && !this.serialNoCST.equals(other.serialNoCST))) { 
      return false; 
     } 
     return true; 
    } 

    @Override 
    public String toString() { 
     return "com.prs.model.Customers[ serialNoCST=" + serialNoCST + " ]"; 
    } 

} 

作爲一個普通的動作我的推杆我所有的實體類，並在一個jar文件我的persistence.xml文件，並添加到另一個項目，該項目將提供論文實體類的其餘部分的方法的CRUD操作。

之後，我也將我的模型jar文件添加到android項目，但在運行時我得到了太多的錯誤。

我要你幫我知道：

1是否有可能我的實體模型的jar文件添加到Android項目？ 2-我打算用這個jar文件編寫我自己的DAO層，它是否有使用我的實體類和Android API的ContentProvider的衝突。 3，我有選擇的結構有問題嗎？

編輯：添加錯誤堆棧跟蹤

2012-12-13 11:23:28 - MobileAndroidSolution] Dx 
trouble processing "javax/xml/stream/EventFilter.class": 

Ill-advised or mistaken usage of a core class (java.* or javax.*) 
when not building a core library. 

This is often due to inadvertently including a core library file 
in your application's project, when using an IDE (such as 
Eclipse). If you are sure you're not intentionally defining a 
core class, then this is the most likely explanation of what's 
going on. 

However, you might actually be trying to define a class in a core 
namespace, the source of which you may have taken, for example, 
from a non-Android virtual machine project. This will most 
assuredly not work. At a minimum, it jeopardizes the 
compatibility of your app with future versions of the platform. 
It is also often of questionable legality. 

If you really intend to build a core library -- which is only 
appropriate as part of creating a full virtual machine 
distribution, as opposed to compiling an application -- then use 
the "--core-library" option to suppress this error message. 

If you go ahead and use "--core-library" but are in fact 
building an application, then be forewarned that your application 
will still fail to build or run, at some point. Please be 
prepared for angry customers who find, for example, that your 
application ceases to function once they upgrade their operating 
system. You will be to blame for this problem. 

If you are legitimately using some code that happens to be in a 
core package, then the easiest safe alternative you have is to 
repackage that code. That is, move the classes in question into 
your own package namespace. This means that they will never be in 
conflict with core system classes. JarJar is a tool that may help 
you in this endeavor. If you find that you cannot do this, then 
that is an indication that the path you are on will ultimately 
lead to pain, suffering, grief, and lamentation. 

[2012-12-13 11:23:28 - MobileAndroidSolution] Dx 1 error; aborting 
[2012-12-13 11:23:28 - MobileAndroidSolution] Conversion to Dalvik format failed with error 1 

預先感謝您。

Answer 1

Android不支持JPA，也不支持Java EE等類。你應該確保你的類只引用了Android SDK提供的內容。

如果您想確保將jar依賴關係鏈接到您的應用中，則必須將它們放入最近版本的Eclipse ADT的libs /文件夾中。