Java生成kml文件

一个kml文件其实就是一个xml文件加上一个png图标文件压缩而成，我们要生成kml，思路就很简单了：
1. 生成xml文件，将坐标信息写入到此xml，但是在输出时要将扩展名改为kml；
2. 找到一个png文件，和上面生成的kml压缩成一个压缩文件即可，注意压缩文件的扩展名为kml；

下面是代码

package com.xml.demo;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.util.zip.ZipEntry;import java.util.zip.ZipOutputStream;import org.dom4j.Document;import org.dom4j.DocumentHelper;import org.dom4j.Element;import org.dom4j.io.OutputFormat;import org.dom4j.io.XMLWriter;public class XmlDemo {    public static void main(String[] args) throws Exception {        Element root = DocumentHelper.createElement("kml");  //根节点是kml        Document document = DocumentHelper.createDocument(root);          //给根节点kml添加属性          root.addAttribute("xmlns", "http://www.opengis.net/kml/2.2")        .addAttribute("xmlns:gx", "http://www.google.com/kml/ext/2.2")        .addAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance")        .addAttribute("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");          //给根节点kml添加子节点  Document        Element documentElement = root.addElement("Document");          documentElement.addElement("name").addText("kml文件名"); //添加name节点         documentElement.addElement("Snippet").addText(""); //Snippet节点        Element folderElement = documentElement.addElement("Folder");//Folder节点        folderElement.addAttribute("id", "FeatureLayer0");        //给Folder节点添加子节点        folderElement.addElement("name").addText("kml文件名");         folderElement.addElement("Snippet").addText("");         //循环添加每一个Placemark节点，有几个坐标点就有几个Placemark节点，这里仅作示例        for (int i = 0; i < 5; i++) {            Element placeMarkElement = folderElement.addElement("Placemark");            placeMarkElement.addAttribute("id", String.valueOf(i));            placeMarkElement.addElement("name").addText("每一个坐标点的名字");             placeMarkElement.addElement("Snippet").addText("");            placeMarkElement.addElement("description").addText("");            placeMarkElement.addElement("styleUrl").addText("#IconStyle00");            Element pointElement = placeMarkElement.addElement("Point");            pointElement.addElement("altitudeMode").addText("clampToGround");            //添加每一个坐标点的经纬度坐标，这里仅作示例            pointElement.addElement("coordinates").addText("119.39986000,31.13396700000143,0");        }        Element styleElement = documentElement.addElement("Style");//Style节点        styleElement.addAttribute("id", "IconStyle00");        // IconStyle        Element iconStyleElement = styleElement.addElement("IconStyle");        Element iconElement = iconStyleElement.addElement("Icon");        iconElement.addElement("href").addText("Layer0_Symbol_107dde08.png");        iconStyleElement.addElement("scale").addText("0.250000");        // LabelStyle          Element labelStyleElement = styleElement.addElement("LabelStyle");        labelStyleElement.addElement("color").addText("00000000");        labelStyleElement.addElement("scale").addText("0.000000");        // PolyStyle        Element polyStyleElement = styleElement.addElement("PolyStyle");        polyStyleElement.addElement("color").addText("ff000000");        polyStyleElement.addElement("outline").addText("0");       //将kml写出本地        OutputFormat format = OutputFormat.createPrettyPrint();          format.setEncoding("utf-8");//设置编码格式          XMLWriter xmlWriter = new XMLWriter(new FileOutputStream("doc.kml"),format);          xmlWriter.write(document);         xmlWriter.close();          //开始对文件进行压缩，一个kml文件其实是一个压缩文件，里面包含一个kml文件和一个png图标        String[] strs = new String[2];        strs[0]="doc.kml";        strs[1]="Layer0_Symbol_107dde08.png";//这里写图片的路径        writeKml(strs, "kml文件名");        System.out.println("success");    }    public static void writeKml(String[] strs, String kmlName) throws IOException    {         String[] files = strs;         //File kmlFile = new File("person.kml");        OutputStream os = new BufferedOutputStream( new FileOutputStream(kmlName + ".kml"));         ZipOutputStream zos = new ZipOutputStream(os);        byte[] buf = new byte[8192];        int len;        for (int i=0;i < files.length;i++) {              File file = new File(files[i]);            if ( !file.isFile() )                continue;            ZipEntry ze = new ZipEntry( file.getName() );            zos.putNextEntry( ze );            BufferedInputStream bis = new BufferedInputStream( new FileInputStream( file ) );            while ( ( len = bis.read( buf ) ) > 0 ) {                zos.write( buf, 0, len );            }            zos.closeEntry();        }        zos.closeEntry();         zos.close();    }}