具体方法：

1. 在jaxb的setClasstobebounds中，只需要子类的class，无需父类。

2. 父类的前面加如下声明：

@XmlAccessorType(XmlAccessType.FIELD)@XmlSeeAlso({    子类.class})public class 父类 extends Entity{    @XmlElement    public String platformid;    @XmlElement    public String pointid;        public String getPlatformid() {        return platformid;    }    public void setPlatformid(String platformid) {        this.platformid = platformid == null ? null : platformid.trim();    }    public String getPointid() {        return pointid;    }    public void setPointid(String pointid) {        this.pointid = pointid == null ? null : pointid.trim();    }}

3. 子类如下：

@XmlAccessorType(XmlAccessType.FIELD)@XmlRootElement(name="parameters")public class TPointInfo extends TPointInfoKey{    @XmlElement    private String pointname;    @XmlElement    private String longitude;    @XmlElement    private String latitude;    @XmlElement    private String groupid;        public String getPointname() {        return pointname;    }    public void setPointname(String pointname) {        this.pointname = pointname == null ? null : pointname.trim();    }    public String getLongitude() {        return longitude;    }    public void setLongitude(String longitude) {        this.longitude = longitude == null ? null : longitude.trim();    }    public String getLatitude() {        return latitude;    }    public void setLatitude(String latitude) {        this.latitude = latitude == null ? null : latitude.trim();    }    public String getGroupid() {        return groupid;    }    public void setGroupid(String groupid) {        this.groupid = groupid == null ? null : groupid.trim();    }}