I ve在谷歌应用引擎数据库中创建了一个表格。 它包含以下<代码>FIELDS(GROUPNAME,GROUPID,GROUPDESC)。 我如何将<代码>GROUPID作为主要钥匙?
我的法典如下:
@Entity
@Table(name="group" , schema="PUBLIC")
public class Creategroup {
@Basic
private String groupname;
@Basic
private String groupid;
@Basic
private String groupdesc;
public void setGroupname(String groupname) {
this.groupname = groupname;
}
public String getGroupname() {
return groupname;
}
public void setGroupid(String groupid) {
this.groupid = groupid;
}
public String getGroupid() {
return groupid;
}
public void setGroupdesc(String groupdesc) {
this.groupdesc = groupdesc;
}
public String getGroupdesc() {
return groupdesc;
}
public Creategroup(String groupname, String groupid, String groupdesc
) {
// TODO Auto-generated constructor stub
this.groupname = groupname;
this.groupid = groupid;
this.groupdesc = groupdesc;
}
}