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();

}

}