java程序如下:
package gao.map.preprocess;import java.io.BufferedWriter;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStreamWriter;import javax.xml.parsers.ParserConfigurationException;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;import org.xml.sax.helpers.DefaultHandler;import org.xml.sax.Attributes;import org.xml.sax.SAXException;/** * 处理从OpenStreetMap下载的原始数据,将抽取的数据输出为text文件 * @author Administrator * */public class OpenStreetMap { static String s = null; //实现自己的解析方式 static class MySAXHandler extends DefaultHandler { FileOutputStream fosPoint; FileOutputStream fosArc; OutputStreamWriter oswPoint; OutputStreamWriter oswArc; BufferedWriter bwPoint; BufferedWriter bwArc; //开始解析时调用 public void startDocument() throws SAXException { // 点信息 File pointFile = new File("D:\\项目\\mongo\\MapPre\\Point.txt"); // 弧信息 File arcFile = new File("D:\\项目\\mongo\\MapPre\\Arc.txt"); try { fosPoint = new FileOutputStream(pointFile); fosArc = new FileOutputStream(arcFile); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } oswPoint = new OutputStreamWriter(fosPoint); oswArc = new OutputStreamWriter(fosArc); bwPoint = new BufferedWriter(oswPoint); bwArc = new BufferedWriter(oswArc); System.out.println("开始解析文档!"); } //完成解析时调用 public void endDocument() throws SAXException { try { bwPoint.close(); oswPoint.close(); fosPoint.close(); bwArc.close(); oswArc.close(); fosArc.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println("文档解析完成!"); } /** * 开始一个元素的解析 * @param uri * @param localName * @param qName 标签名 * @param attributes 属性 * @throws SAXException */ public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { if ((attributes != null)&&attributes.getLength() > 0) { if(qName.equals("node")){ StringBuilder sb = new StringBuilder(); sb.append(attributes.getValue("id")+" "); sb.append(attributes.getValue("lat")+" "); sb.append(attributes.getValue("lon")); try { bwPoint.write(sb.toString()+"\r\n"); bwPoint.flush(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println(sb.toString()); }else if(qName.equals("way")){ s = attributes.getValue("id")+" " +attributes.getValue("version")+" "; }else if(qName.equals("nd")){ if(s==null) return; try { bwArc.write(s+attributes.getValue("ref")+" \r\n"); bwArc.flush(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println(s+attributes.getValue("ref")+" "); }else if(qName.equals("tag")){ if(s==null) return; try { bwArc.write(s+" "+attributes.getValue("k")+"\r\n"); bwArc.flush(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println(s+" "+attributes.getValue("k")); }else if(qName.equals("relation")){ if(s!=null) s = null; } } } /** * 结束一个元素的解析,遇到结束标签时调用此方法 通常在此方法对标签取值并处理 * @param uri * @param localName * @param qName * @throws SAXException */ public void endElement(String uri, String localName, String qName) throws SAXException { } //该方法是获得元素间的text文本内容,可以通过new String(ch, start, length)来获得 public void characters(char[] ch, int start, int length) throws SAXException {// System.out.print(new String(ch, start, length)); } } public static void main(String[] args) { SAXParserFactory saxfac = SAXParserFactory.newInstance(); try { SAXParser saxparser = saxfac.newSAXParser(); InputStream is = new FileInputStream("D:\\项目\\map"); MySAXHandler handler = new MySAXHandler(); saxparser.parse(is, handler);; } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (ParserConfigurationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SAXException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } }}