Java(Android)解析KML文件
參考自：http://blog.csdn.net/yyywyr/article/details/38359049
http://blog.csdn.net/warrenwyf/article/details/5703279
http://zhidao.baidu.com/question/568729363.html
1 KML文件
現有一個在ARCGIS中生成的點要素shapefile文件，將其轉換成kmz文件。可是這個kmz文件并非純文本的KML服務。而是一個壓縮文件，用壓縮軟件打開這個kmz之后會發現當中包括了一個“doc.kml”和一個“*.png”圖標文件。因此。我們須要解析的就是這個doc.kml文件。
其格式例如以下：
<?xml version="1.0" encoding="UTF-8"?
>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.opengis.net/kml/2.2 http://schemas.opengis.net/kml/2.2.0/ogckml22.xsd http://www.google.com/kml/ext/2.2 http://code.google.com/apis/kml/schema/kml22gx.xsd">
<Document id="4thalter">
<name>4thalter</name>
<Snippet></Snippet>
<Folder id="FeatureLayer0">
<name>4thalter</name>
<Snippet></Snippet>
<Placemark id="ID_00000">
<name>456</name>
<Snippet></Snippet>
<description>
這里是一個HTML文檔
</description>
<styleUrl>#IconStyle00</styleUrl>
<Point>
<altitudeMode>clampToGround</altitudeMode>
<coordinates> 119.46,30.96,0</coordinates>
</Point>
</Placemark>
<Placemark id="ID_00002">
<name>457</name>
<Snippet></Snippet>
<description>
這里是一個HTML文檔
</description>
<styleUrl>#IconStyle00</styleUrl>
<Point>
<altitudeMode>clampToGround</altitudeMode>
<coordinates> 120.46,30.96,0</coordinates>
</Point>
</Placemark>
<Placemark id="ID_00022">
<name>xc64</name>
<Snippet></Snippet>
<description>
這里是一個HTML文檔
</description>
<styleUrl>#IconStyle00</styleUrl>
<Point>
<altitudeMode>clampToGround</altitudeMode>
<coordinates> 118.81,30.93,0</coordinates>
</Point>
</Placemark>
</Folder>
<Style id="IconStyle00">
<IconStyle>
<Icon><href>Layer0_Symbol_11269a08.png</href></Icon>
<scale>0.437500</scale>
</IconStyle>
<LabelStyle>
<color>ff000000</color>
<scale>0.833333</scale>
</LabelStyle>
<PolyStyle>
<color>ff000000</color>
<outline>0</outline>
</PolyStyle>
</Style>
</Document>
</kml>
我們須要解析的屬性標簽存放在description結點下的HTML中，例如以下：
<![CDATA[<html xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:msxsl="urn:schemas-microsoft-com:xslt">
<head>
<META http-equiv="Content-Type" content="text/html">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body>
<table>
<tr>
<td>第四組</td>
</tr>
<tr>
<td>
<table>
<tr>
<td>FID</td>
<td>22</td>
</tr>
<tr bgcolor="#D4E4F3">
<td>soiltype</td>
<td>6</td>
</tr>
<tr>
<td>x</td>
<td>673556</td>
</tr>
<tr bgcolor="#D4E4F3">
<td>y</td>
<td>3424365</td>
</tr>
<tr>
<td>dem</td>
<td>14</td>
</tr>
<tr bgcolor="#D4E4F3">
<td>planc</td>
<td>0</td>
</tr>
<tr>
<td>profc</td>
<td>0</td>
</tr>
<tr bgcolor="#D4E4F3">
<td>slope</td>
<td>0</td>
</tr>
<tr>
<td>PYNAME</td>
<td>第四組</td>
</tr>
<tr bgcolor="#D4E4F3">
<td>ID</td>
<td>664</td>
</tr>
<tr>
<td>name</td>
<td>xc64</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>
]]>在本案例中。我須要從HTML中提取出坐標x,y和name這三個屬性。代碼例如以下：
package com.test.parsekml;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.jsoup.Jsoup;
import org.jsoup.select.Elements;
import android.util.Log;
public class ReadKml {
public void parseKml(String pathName) throws Exception
{
File file = new File(pathName);//pathName為KML文件的路徑
try {
ZipFile zipFile = new ZipFile(file);
ZipInputStream zipInputStream = null;
InputStream inputStream = null;
ZipEntry entry = null;
zipInputStream = new ZipInputStream(new FileInputStream(file));
while ((entry = zipInputStream.getNextEntry()) != null) {
String zipEntryName = entry.getName();
Log.d("壓縮實體的名稱：", zipEntryName);
if (zipEntryName.endsWith("kml") || zipEntryName.endsWith("kmz")) {
inputStream = zipFile.getInputStream(entry);
parseXmlWithDom4j(inputStream);
}else if (zipEntryName.endsWith("png")) {
/*ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
byte[] b = new byte[512];
int readedByteSize = 0;
while ((readedByteSize = zipInputStream.read(b)) != -1) {
byteArrayOut.write(b, 0, readedByteSize);
}
byteArrayOut.flush();
byteArrayOut.close();
InputStream isBitmap = new ByteArrayInputStream(byteArrayOut.toByteArray());
Bitmap bitmap = BitmapFactory.decodeStream(isBitmap);
isBitmap.close();*/
}
}
zipInputStream.close();
inputStream.close();
} catch (ZipException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void parseXmlWithDom4j(InputStream input) throws Exception
{
SAXReader reader = new SAXReader();
Document document = null;
try {
document = reader.read(input);
} catch (DocumentException e) {
// TODO: handle exception
e.printStackTrace();
}
Element root = document.getRootElement();//獲取doc.kml文件的根結點
listNodes(root);
}
//遍歷當前節點下的全部節點
public void listNodes(Element node){
Log.d("當前結點的名稱:", node.getName());
//首先獲取當前節點的全部屬性節點
/* List<Attribute> list = node.attributes();
//遍歷屬性節點
for(Attribute attribute : list){
Log.d("屬性", attribute.getName() +":" + attribute.getValue());
} */
//假設當前節點內容不為空，則輸出
if(!(node.getTextTrim().equals("")) && "description".equals(node.getName())){
//Log.d("當前結點內容：", node.getText());
parseHtml(node.getText());
}
//同一時候迭代當前節點以下的全部子節點
//使用遞歸
Iterator<Element> iterator = node.elementIterator();
while(iterator.hasNext()){
Element e = iterator.next();
listNodes(e);
}
}
public void parseHtml(String htmlData)
{
org.jsoup.nodes.Document document = Jsoup.parse(htmlData);
Elements trs = document.select("table").select("tr");
String trContent = "";
String trContentSplit[] = null;
String x = "";
String y = "";
String name = "";
for (int i = 2; i < trs.size(); i++) {//在KML文件里的HTML文本中，共同擁有13個tr，每一個tr包括了一個屬性，當中第二個tr包括了全部的屬性，因此我們在處理時從第三個tr開始
trContent = trs.get(i).text();
trContentSplit = trContent.split(" ");
if ("name".equals(trContentSplit[0])) {
name = trContentSplit[1];
}
if ("x".equals(trContentSplit[0]) || "X".equals(trContentSplit[0])) {
x = trContentSplit[1].trim();
}
if ("y".equals(trContentSplit[0]) || "Y".equals(trContentSplit[0])) {
y = trContentSplit[1].trim();
}
/*Elements tds = elements.get(i).select("td");
for (int j = 0; j < tds.size(); j++) {
htmlContent = tds.get(j).text();
}*/
}
Log.d("X:", x);
Log.d("Y:", y);
Log.d("Name:", name);
}
}
本文中使用了dom4j包來解析XML和jsoup包來解析HTML
總結
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