快速解析大xml报文

如何快速解析大的xml文件。

案例：

package grp.pb.branch.qinhuangdao.batchvoucher.impl;import java.io.File;
import java.util.List;import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;public class XmlDemo {public static void main(String[] args) {try {// 创建SAXReaderSAXReader reader = new SAXReader();/*Document document = reader.read(new File("F:\\tipsFiles\\1521105905823\\wage.xml"));// 获取根节点Element root = document.getRootElement();// 查找指定节点名称QName的所有子节点elementsList<Element> list = root.elements("WAGE");*//* Document document = reader.read(new File("F:\\tipsFiles\\1521105905823\\unitvsitem.xml"));// 获取根节点Element root = document.getRootElement();// 查找指定节点名称QName的所有子节点elementsList<Element> list = root.elements("ITEM");*/Document document = reader.read(new File("F:\\tipsFiles\\1521105905823\\unit.xml"));// 获取根节点Element root = document.getRootElement();// 查找指定节点名称QName的所有子节点elementsList<Element> list = root.elements("UNIT");// 获取empfor (Element object : list) {System.out.println(object.getName());// System.out.println(object.attribute("department").getData());for (Element element : (List<Element>) object.elements()) {System.out.print(((Element) element).getName() + ":");System.out.print(element.getText() + " ");}System.out.println();}} catch (DocumentException e) {e.printStackTrace();}}
}

 

 

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       SAXReader reader = new SAXReader();
//        DocumentHelper.Document document = reader.read( new File(destDirStr+File.separator+"wage.xml"));Element root = document.getRootElement();// 得到根节点// 获取根节点List<Element> nodes = root.elements("WAGE");for(Element e : nodes){BatchPayRequest request = new BatchPayRequest();String admdiv_code = e.selectSingleNode("CANTONID").getText();//区划request.setAdmdiv_code(admdiv_code);String pay_amount = e.selectSingleNode("SFX").getText();//实发项request.setPay_amount(new BigDecimal(pay_amount));String payee_account_no = e.selectSingleNode("ACCOUNTNUM").getText();//收款账号request.setPayee_account_no(payee_account_no);String payee_account_name = e.selectSingleNode("NAME").getText();//姓名request.setPayee_account_name(payee_account_name);//给batchPayRequets付一些基础属性long id = IdGen.genNumId();request.setBatchpay_request_id(id);request.setBatchpay_request_code("gongzi_"+id);request.setVt_code("8207");request.setBill_type_id(71);request.setBiz_type_id(100230002);//TODO:这个可能不对request.setTrans_succ_flag(QHDConstant.BATCH_REQUEST_NOT_TRANS);//未交易requestList.add(request);}