如何将oracle.sql.TIMESTAMP 转换为 java date

private String getDate(Object value) { 

Timestamp timestamp = null; 
try { 
timestamp = (Timestamp) value; 
} catch (Exception e) { 
timestamp = getOracleTimestamp(value); 
} 
if(timestamp!=null) 
return (new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S"))     .format(timestamp); 
else return null; 
} 
/** 
     * @reference oracle.sql.Datum.timestampValue(); 
     * @return 
     */ 
private Timestamp getOracleTimestamp(Object value) { 
try { 
Class clz = value.getClass(); 
Method m = clz.getMethod("timestampValue", null); 
                       //m = clz.getMethod("timeValue", null); 时间类型 
                       //m = clz.getMethod("dateValue", null); 日期类型 
return (Timestamp) m.invoke(value, null); 

} catch (Exception e) { 
return null; 
} 
}