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dom4j½âÎöʱÅ×XML file has no top-element.  All well-formed XML files have a single top-level element. DOM4J´úÂ룺     String xml=".....";     SAXReader reader = new SAXReader();     Document document = reader.read(xml);     ..... String xml ¸ñʽ£º <?xml version = '1.0' encoding = 'gb2312'?> <ROOT> <ER>0</ER> <MSG>null</MSG>    <RESULT num="1">       <C_ITEMNO>430300200400052</C_ITEMNO>       <C_ITEMID>53</C_ITEMID>       <C_ITEMNAME>12ÔÂ19ÈÕ²âÊÔ</C_ITEMNAME>       <C_INITPERMMITFILE NULL="TRUE"/>       <C_YEARPLANNO1>123</C_YEARPLANNO1>       <C_YEARPLANNO2>2004</C_YEARPLANNO2>       <C_YEARPLANNO3>3</C_YEARPLANNO3>       <C_CODE_ZIP>430300</C_CODE_ZIP>       <C_ITEMADDR>Öйú</C_ITEMADDR>       <C_CODE_ITEMPROP>1</C_CODE_ITEMPROP>       <C_CODE_INVESTMENT>1</C_CODE_INVESTMENT>       <C_CODE_FUNDSOURCE>1</C_CODE_FUNDSOURCE>       <C_SHOPDRAWINGCENSORNO NULL="TRUE"/>       <C_MAPNO NULL="TRUE"/>       <C_WATERCITYINTERFACE NULL="TRUE"/>       <C_GASCITYINTERFACE NULL="TRUE"/>       <C_FRAMEACCOUNTEDITION NULL="TRUE"/>       <C_LICENCENO NULL="TRUE"/>       <D_INCEPTDATE>2001-01-01 00:00:00.0</D_INCEPTDATE>       <C_MEMO NULL="TRUE"/>       <D_OPERATE>2004-12-19 16:33:36.0</D_OPERATE>       <C_OPERATER>111</C_OPERATER>       <C_PUNISHNOTENO NULL="TRUE"/>    </RESULT> </ROOT> Òì³£ÐÅϢΪ£ºXML file has no top-element.  All well-formed XML files have a single top-level element. °ÑÕâ¸öXML¿½±´³öÀ´·ÅÔÚÒ»¸öxxx.xmlÎļþÖУ¬ÔÙÀ´ÓÃdom4j½âÎö¾ÍÍêȫûÓÐÎÊÌâ¡£     File f = new File("xxx.xml");     SAXReader reader = new SAXReader();     Document document = reader.read(f); лл¡£    Êղؠ  ·ÖÏí   ¶¥(0)