利用dom解析xml需要一次性加载所有的xml内容 内容太大就要加大虚拟机的内存，如果超大，内存无法存放的话
就只能采用流的形式了
xml内容
- <ExecResult diffgr:id="ExecResult1" msdata:rowOrder="0" diffgr:hasChanges="inserted" xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<ResultValue>True</ResultValue>
<ResultInfo>登录成功！</ResultInfo>
<StatDateTime>2011-4-21</StatDateTime>
</ExecResult>
- <INTENT diffgr:id="INTENT2" msdata:rowOrder="1" xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<INTENTID>8304885</INTENTID>
<ADDCODE>4407</ADDCODE>
<SENDDATE>2011-04-15 21:47:52</SENDDATE>
<NMEMBERID>300479</NMEMBERID>
<SMEMBERID>167131</SMEMBERID>
<THEITEMID>6642238</THEITEMID>
<COMMODITYID>88491</COMMODITYID>
<BATCH>400</BATCH>
<PRICE>29.2200</PRICE>
<INNERID>20209</INNERID>
<PROJECTID>260</PROJECTID>
</INTENT>
- <SENDPRODUCT diffgr:id="SENDPRODUCT4602" msdata:rowOrder="4601" xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<THEITEMID>6360192</THEITEMID>
<ADDCODE>4418</ADDCODE>
<SENDQUANTITY>48</SENDQUANTITY>
<BATCHTXT>10071002</BATCHTXT>
<BILLNUMBER />
<VALIDITYDATE>2012-1-9 0:00:00</VALIDITYDATE>
<INVOICENUMBER />
<SENDDATE>2011-04-15 17:40:10</SENDDATE>
<PROJECTID>260</PROJECTID>
<INNERID>3066</INNERID>
<NMEMBERID>300370</NMEMBERID>
<SMEMBERID>166980</SMEMBERID>
<COMMONDITYID>49511</COMMONDITYID>
<GUIDCODE />
</SENDPRODUCT>
- <PUBLIC_MEMBER diffgr:id="PUBLIC_MEMBER1" msdata:rowOrder="0" xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<MEMBERID>305659</MEMBERID>
<MEMBERCLASSID>1</MEMBERCLASSID>
<MEMBERCLASSNAME>医疗机构</MEMBERCLASSNAME>
<MEMBERNAME>惠州市惠城区横沥医院</MEMBERNAME>
<ADDCODE>441302</ADDCODE>
<TELEPHONE>13652772813</TELEPHONE>
<FAX>0752-3185010</FAX>
<ZIP>516253</ZIP>
<THEADDRESS>惠州市惠城区横沥镇解放路184号</THEADDRESS>
<EMAIL>heng1958@163.com</EMAIL>
<CONTACT>邹宣平</CONTACT>
</PUBLIC_MEMBER>
- <PUBLIC_MEMBER_INFO diffgr:id="PUBLIC_MEMBER_INFO1" msdata:rowOrder="0" xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<MEMBERID>26508</MEMBERID>
<LICENSEID>粤HB20060033</LICENSEID>
<REG_ADDRESS>广州增城市中新镇风光路178号</REG_ADDRESS>
<DEPUTY>陈桂恩</DEPUTY>
<PRESIDENT>陈桂恩</PRESIDENT>
<QUANLITYPRINCIPAL />
<SALESMODE />
<PUBLICDEPARTMENT />
<PROCESSSPAN>2010-12-31 00:00:00</PROCESSSPAN>
</PUBLIC_MEMBER_INFO>
- <Product diffgr:id="Product478" msdata:rowOrder="477" xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<THEITEMID>412</THEITEMID>
<ADDCODE>4401</ADDCODE>
<SENDQUANTITY>1</SENDQUANTITY>
<BATCHTXT>11</BATCHTXT>
<BILLNUMBER />
<VALIDITYDATE>2</VALIDITYDATE>
<INVOICENUMBER>FP201103</INVOICENUMBER>
<SENDDATE>2011-03-28 17:45:26</SENDDATE>
<PROJECTID>142</PROJECTID>
<INNERID>1</INNERID>
<NMEMBERID>166764</NMEMBERID>
<SMEMBERID>156400</SMEMBERID>
<COMMONDITYID>328000</COMMONDITYID>
</Product>
- <COMMODITY diffgr:id="COMMODITY1" msdata:rowOrder="0" xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<COMMODITYID>53829</COMMODITYID>
<PROJECTID>260</PROJECTID>
<TRADENAME>注射用亚叶酸钙</TRADENAME>
<DOSE>注射用无菌粉末（冻干粉针）</DOSE>
<SPEC>0.1g</SPEC>
<PACKSPEC>1支/盒</PACKSPEC>
<UNIT>支</UNIT>
<PRODUCER_MEMBER_ID>155316</PRODUCER_MEMBER_ID>
<PNAME>山西普德药业股份有限公司</PNAME>
<APPROVE_NO>国药准字H14022464</APPROVE_NO>
<DRUG_NAME>亚叶酸钙</DRUG_NAME>
<DRUG_ID>5967</DRUG_ID>
<DRUG_TYPE>1</DRUG_TYPE>
<GMP_TYPE>1</GMP_TYPE>
<GMP_NUMBER>G3662</GMP_NUMBER>
<GMP_ENDDATE>2010-12-13 00:00:00</GMP_ENDDATE>
<CONTROLID>1</CONTROLID>
<INNERID>33824</INNERID>
<THESTATE>1</THESTATE>
<COMMODITYIDFORTC>53829</COMMODITYIDFORTC>
<ISBASECOMM>0</ISBASECOMM>
</COMMODITY>
</NewDataSet>
利用sax读取xml 内容是有技巧性的 比如如何处理 相同名字的节点 中文的话 他会一个字一个字的度的问题
一下代码给出解释：
package cn.net.tc.yjj.core.utils;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Date;
import java.util.List;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import cn.net.tc.yjj.system.dto.Commodity;
import cn.net.tc.yjj.system.dto.Intent;
import cn.net.tc.yjj.system.dto.PublicMember;
import cn.net.tc.yjj.system.dto.PublicMemberInfo;
import cn.net.tc.yjj.system.dto.SendProduct;
import cn.net.tc.yjj.system.dto.Intent;
import cn.net.tc.yjj.system.dto.PublicMember;
import cn.net.tc.yjj.system.dto.PublicMemberInfo;
import cn.net.tc.yjj.system.dto.SendProduct;