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ÔÚservice(spring)ÖÐÍê³É
step 1:
´ò¿ªÒ»¸ösession
д sql Óï¾ä£¬
×¢Òâµã£ºÐ´sqlÓï¾äʱ,Ëù²éѯµÄÊÔͼΪ£ºkangaroo_VW_UnitView£¬´ËÊÔͼµÄÉú³É
ÓÐ kangaroo_unit±í×óÁ¬½Óµ½kangaroo_img±í¶øÉú³É¡£
step 2:
°ÑËù²éѯµÄ·ûºÏÌõ¼þµÄ¼¯ºÏ·ÅÈëÁÙʱµÄArrayListÖУ¬²¢¶ÔÁÙʱµÄArrayList½øÐÐ
µü´ú¡£
step 3:
°Ñµü´ú³öÀ´µÄ¼¯ºÏ¶ÔÏó°ü×°³ÉʵÌå¶ÔÏó(pojo)
step 4:
ÅжÏʵÌå¶ÔÏó(pojo)µÄ¸öÊý£¬×îºÃ±ê¼ÇΪ first,nextµÈ,²¢ÇÒµ÷ÓÃgetʵÌå¶ÔÏó
µÄget/set·½·¨È¡³öÒª¸ü¸ÄµÄÊôÐÔ¡£
step 5:
¹Ø±ÕÒ»¸ösession
step 6:
ÔÚʵÌå¶ÔÏó(pojo)ÖÐÖØдtoString()·½·¨
 @Override
 public String toString()
    {
        String ret = "";
        ret = "  <Unit>\n";
       ret = (new StringBuilder(String.valueOf(ret))).append("   
<UnitID>").append(unitid).append("</UnitID>\n").toString();       
......
       ret = (new StringBuilder(String.valueOf(ret))).append(" 
</Unit>\n").toString();
       return ret;
}