JDO 物件：Contact.java

package com.emprogria; import javax.jdo.annotations.IdGeneratorStrategy; import javax.jdo.annotations.IdentityType; import javax.jdo.annotations.PersistenceCapable; import javax.jdo.annotations.Persistent; import javax.jdo.annotations.PrimaryKey; @PersistenceCapable(identityType = IdentityType.APPLICATION) public class Contact { private static final long serialVersionUID = 6354029609824293366L; public String getMsn() { return msn; } public void setMsn(String msn) { this.msn = msn; } public String getRealName() { return realName; } public void setRealName(String realName) { this.realName = realName; } public String getTel() { return tel; } public void setTel(String tel) { this.tel = tel; } @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) private Long id; public Long getId() { return id; } @Persistent private String msn; @Persistent private String realName; @Persistent private String tel; public Contact() { } public Contact(String msn, String realName, String tel) { this.msn = msn; this.realName = realName; this.tel = tel; } }